Vocational interests as a determinant of career choice (Humphreys & Yao, Reference Humphreys and Yao2002) have been gaining attention as theories and measurements of this concept have been widely applied in vocational counselling (Campbell & Borgen, Reference Campbell and Borgen1999; Rayman & Atanasoff, Reference Rayman and Atanasoff1999) and its potential value in personnel selection was revealed (Van Iddekinge, Putka, & Campbell, Reference Van Iddekinge, Putka and Campbell2011). In China, since the enrolment expansion of higher education exacerbated competition in the Chinese labour market and made the choice of vocation crucial to an individual's life, the government, students, educators, and researchers are paying even more attention to vocational interests and its practical application. Therefore, accurate measurement of Chinese vocational interests has become increasingly significant.
Holland's RIASEC typology and hexagonal structure are the most popular theoretic framework and organisational structure in vocational interest inventories (Rottinghaus & Dik, Reference Rottinghaus, Dik and Geisinger2013). But studies have shown that the hexagonal structure is not easily applicable to Chinese populations (e.g., Long & Tracey, Reference Long and Tracey2006; Tang, Reference Tang2009). More specifically, there is not adequate and coherent evidence indicating the applicability of the RIASEC typology for Chinese populations (e.g., Tang, Reference Tang2001; Y. Zhang, Kube, Wang, & Tracey, Reference Zhang, Kube, Wang and Tracey2013). However, most vocational interest measurement instruments used in China are still directly adapted from Western countries, based on Holland's model. This procedure may cause a major problem of failing to address important culture-specific types or dimensions that are indigenous to the Chinese cultural background. Besides, vocational interests may also vary in the fast-changing working patterns and lifestyles of this rapidly modernising society.
Thus, to provide a valid assessment instrument for Chinese vocational interests and to explore its general content and construct for the future career choices of young Chinese, this study aimed to establish an inventory based on indigenous Chinese samples and items.
Definition and Theoretic Background of Vocational Interests
Vocational interests, a key component of a person's work personality, has long been a central focus of career intervention and vocational psychology (Larson, Bonitz, & Pesch, Reference Larson, Bonitz, Pesch, Walsh, Savickas and Hartung2013). It refers to interests in choice of vocation and is defined as a relatively stable individual preference for certain types of work activities and environments (Dik & Hansen, Reference Dik and Hansen2008; Harmon, Hansen, Borgen, & Hammer, Reference Harmon, Hansen, Borgen and Hammer1994; Low, Yoon, Roberts, & Rounds, Reference Low, Yoon, Roberts and Rounds2005).
Vocational interests have proven to be important for achievement in working environments and educational settings, given their relationship with outcome variables like job performance and job satisfaction (Spokane, Reference Spokane1985; Hansen, Reference Hansen, Brown and Lent2005). Also, the measurement of vocational interests has important significance in practice, as Carless (Reference Carless1999) noted: vocational interests assessment can enhance client self-understanding, promote self-exploration, and assist realistic decision making by providing feedback, new perspectives, and information. Vocational interest inventories are among the most commonly used measures in career counselling practice (Hansen, Reference Hansen, Brown and Lent2005).
The most influential and best-known theory of vocational interests is Holland's hexagonal model (Holland, Reference Holland1973, Reference Holland1997; Holland & Gottfredson, Reference Holland and Gottfredson1992). Holland (Reference Holland1997) categorised preferences for activities in the workplace into six general types: Realistic (R), Investigative (I), Artistic (A), Social (S), Enterprising (E), and Conventional (C) (RIASEC). These types were arranged in a hexagon in the order of R-I-A-S-E-C. Briefly, Realistic interests reflect the appreciation of things, being outdoors, and working with one's hands. Investigative interests are typified by interests in science, thinking, and problem solving. Artistic interests define those who are creative and who rely on feelings and appreciate aesthetics. Social interests refer to the disposition to help and teach others. Enterprising interests are characterised by business and entrepreneurial pursuits, as well as motivating, persuading, and leading others. Conventional interests capture a preference for conscientious, organised, and detail-oriented practices (Holland, Reference Holland1997). In light of Holland's (Reference Holland1997) theory, vocational interests are an expression of the congruence between one's personality and work, and the fit between the person and the work environment will have profound effects on vocational satisfaction, stability, and achievement.
Anchored conceptually in Holland's theory, some vocational interest measurements have been developed, such as the Vocational Preference Inventory (VPI) and the Self-Directed Search (SDS) (Holland, Reference Holland1985a, Reference Holland1985b, Reference Holland1994; Holland & Messer, Reference Holland and Messer2013). Several other popular interest inventories, such as the Campbell Interest and Skills Survey (CISS; Campbell, Hyne, & Nilsen, Reference Campbell, Hyne and Nilsen1992) and the Strong Interest Inventory (SII; Donnay, Morris, Shaubhut, & Thompson, Reference Donnay, Morris, Shaubhut and Thompson2005; Harmon et al., Reference Harmon, Hansen, Borgen and Hammer1994) have adopted Holland's RIASEC typology to some extent since the 1970s to organise results (Savickas, Taber, & Spokane, Reference Savickas, Taber and Spokane2002).
Challenges for the Holland's RIASEC Typology
Although Holland's model of vocational interests is broad and inclusive, and has served as the basis of conceptions of research and assessment for over 50 years (Nauta, Reference Nauta2010), there have been arguments concerning this theory for a long time. The first issue is the validity of the six types themselves. Are the six RIASEC types arbitrary? Tracey and Rounds (Reference Tracey and Rounds1995) examined whether interests’ item responses could be clustered into six natural groups, but found that items were uniformly arranged in a circle, and both an eight-scales model and the six-RIASEC-scales model fit the data equally well. Deng, Armstrong, and Rounds (Reference Deng, Armstrong and Rounds2007) found that the RIASEC types were not sufficient to represent the full range of occupations in the United States. These results indicate that there might not be a strong enough empirical basis for the existence and representativeness of the six RIASEC types.
Realising that the RIASEC types may not adequately represent the complexity of the vocational interest space, some researchers noted the issue of more specificity in interest assessment (Borgen & Lindley, Reference Borgen, Lindley and Walsh2003; Day & Rounds, Reference Day and Rounds1997), especially given the incremental validity of using more specific basic interests in predicting job satisfaction (Rottinghaus, Hees, & Conrath, Reference Rottinghaus, Hees and Conrath2009). More specific interest types are conceptions analogous to facets in personality theory, with more specific facets underlying a more global scale such as the RIASEC types. From such a perspective, vocational interests can be viewed from a variety of levels of specificity depending on the purpose of assessment (Tracey & Sodano, Reference Tracey, Sodano, Walsh, Savickas and Hartung2013). Since the six types initially proposed by Holland might not be the perfect solution, we should reconsider what should be the content of vocational interests. And this is an issue that should be discussed with consideration of cultural background and international differences.
Problems of Applying the Holland's Model in Chinese Populations
Since the validity of the six RIASEC types themselves has been challenged by scholars from the United States, we have reason to doubt whether the six RIASEC types originally proposed by Holland can fully represent Chinese vocational interests. A similar example could be addressed from the field of personality. Cheung et al. (Reference Cheung, Leung, Zhang, Sun, Gan, Song and Xie2001) investigated the universality and sufficiency of the Big Five Personality Traits in China with the Revised NEO Personality Inventory (NEO-PI-R) and an indigenous measure — the Chinese Personality Assessment Inventory (CPAI; Cheung et al., Reference Cheung, Leung, Fan, Song, Zhang and Zhang1996). Instead of the well-known, five-factor model, they found a six-factor model with an additional and unique Chinese factor named Interpersonal Relatedness in their Chinese samples. This cross-cultural difference may be suggestive of a similar condition underlying the issue of Chinese vocational interests.
Unfortunately, there has been a lack of examination of interest content and structure across cultures (Tracey & Sodano, Reference Tracey, Sodano, Walsh, Savickas and Hartung2013). Tang (Reference Tang2001) examined the structures of 25 basic interest scales in the Strong Interest Inventory using Chinese samples, but did not completely duplicate the RIASEC themes, with a merger of basic interest scales between Social and Artistic, and a missing Conventional type. On the other hand, the application of the Personal Globe Inventory, one instrument incorporating both a six-RIASEC-type model and an eight-extended-type model in China showed comparable fit between six-RIASEC types and eight types (Long, Adams, & Tracey, Reference Long, Adams and Tracey2005; Y. Zhang et al., Reference Zhang, Kube, Wang and Tracey2013). Due to the differences in measurement instruments and inconclusive results, definitive conclusions cannot be drawn from these studies. Moreover, when Holland's hexagonal structure is applied in China, researchers are confronted with problems. Farth, Leong, and Law (Reference Farth, Leong and Law1998) found a lack of fit of the RIASEC model in Hong Kong populations. Yang, Stokes, and Hui (Reference Yang, Stokes and Hui2005) demonstrated the inapplicability of Holland's RIASEC hexagon in both Mainland China and Hong Kong using the SDS. And in a structural meta-analysis for Chinese participants, Holland's model showed unacceptable fit (Long & Tracey, Reference Long and Tracey2006). Tang (Reference Tang2009) revealed that the interrelationships among the six RIASEC types for Chinese students are not exactly the same pattern as predicted by Holland.
Also, there is a lack of qualified studies focusing on Chinese indigenous vocational interests. The only reference is from H. Zhang, Feng, and Yuan (Reference Zhang, Feng and Yuan2004). They developed an interest scale for college entrance and for career guidance, targeted at Chinese high school students. With factor analysis, they produced seven vocational interest dimensions, including a new type named ‘Natural’, which refers to those who have a curiosity and passion for natural things such as animals and plants (H. Zhang et al., Reference Zhang, Feng and Yuan2004). When looking into the content of vocational interests, the emergence of a main dimension, ‘Natural’, seems to conflict with the original RIASEC themes, where the preferences for nature is only a facet or subscale underlying the general type ‘Realistic’. This study reminds us again of the power of cultural differences and that the six RIASEC themes might not be the perfect solution for Chinese.
After all, the primary objective of vocational interest assessment is to help individuals learn about their interests and match these with apposite occupations. Therefore, renewed attention to this issue is needed.
A Call for Chinese Indigenous Measures
While many instruments measuring vocational interests, such as the SII, the CISS, and the SDS, have been built and are utilised in Western cultures, especially in the United States, Chinese studies focusing on domestic scale development are rare. In most cases, Chinese researchers directly translate or adapt measurement instruments from foreign countries, which is a typical etic approach. However, this procedure should be treated with caution because: (a) it fails to address important culture-specific constructs that are indigenous to a particular culture; (b) responses to the items may not work similarly and may be influenced by culture; and (c) work activities and occupational titles could vary a great deal across cultures (Church, Reference Church1987; Liu & Rounds, Reference Liu and Rounds2003; Tracey & Sodano, Reference Tracey, Sodano, Walsh, Savickas and Hartung2013; Yung et al., Reference Yung, Chan, Cheung, Leung, Law and Zhang2000). Therefore, instead of adapting and validating existing vocational interest inventories from Western cultures, we could consider the emic approach, focusing on identifying indigenous constructs to further explore Chinese vocational interests (see Ægisdóttir, Gerstein, Leung, Kwan, & Lonner, Reference Ægisdóttir, Gerstein, Leung, Kwan, Lonner, Gerstein, Heppner, Ægisdóttir, Leung and Norsworthy2009). An illuminating example is from Iceland, where researchers have developed a set of Icelandic indigenous basic interest scales, including eight general vocational interest clusters, after they found that Holland's RIASEC model did not perfectly correspond to the sample data (Einarsdóttir, Rounds, & Su, Reference Einarsdóttir, Rounds and Su2010; Einarsdóttir, Eyjólfsdóttir, & Rounds, Reference Einarsdóttir, Eyjólfsdóttir and Rounds2013).
On the other hand, vocational interests depicting work preferences closely related to occupations will be shaped by the actual jobs and work environment of a society. China's accelerated development in this century has brought emerging occupations, changing work patterns, and new lifestyles. For instance, the number of undergraduate majors at universities in China was 506 in 2012 (Ministry of Education of the People's Republic of China, 2012). Many new occupations, such as web editor, landscape architect and flavourist, have emerged. In the meantime, people's work tasks and work environment have been constantly updated, resulting in a transformation of behavioural preferences for work. For example, with traditional manual labour in manufacturing being replaced by machines, there will be fewer simple mechanical operation jobs, resulting in a shift in people's pragmatic orientation towards that sort of work. And with the booming development of information technology, there will be more technical work in programming and data analysis. Thus, operational definitions of vocational interests may change over time just as the environment of work changes. Specific measurement items may become outdated. In this case, the construction of new vocational interest assessment instruments is indeed necessary.
The Present Study
Holland's vocational interest typology generated from Western cultures may not be perfectly applicable to Chinese populations. Directly employing instruments from Western countries will probably omit key constructs or dimensions specifically tied to the Chinese cultural background (Liu & Rounds, Reference Liu and Rounds2003; Yung et al., Reference Yung, Chan, Cheung, Leung, Law and Zhang2000). With a fast-changing society, the definitions of original vocational interest types may alter, and items may need to be reconstructed. These problems call for a new vocational interest inventory built on indigenous Chinese samples.
Based on the above, the first goal of the present study was to develop a vocational interest scale based on indigenous Chinese samples to provide a practical measurement tool for researchers and educators. The second goal was to explore the latent structure of vocational interests in China, enhancing the theoretical framework for cross-cultural studies. In the present study, the method of factor analysis was employed instead of commonly used analysis like multidimensional scaling that is often tied to the RIASEC typology. The reason we chose factor analysis is that the Holland's typology tends to classify people into different groups, but there is the possibility that individuals can have different magnitudes of disposition on different types; for example, high scores on opposing types. We assumed that vocational interests or career preferences that resemble personality traits can be measured in independent terms of factors.
STUDY 1
In study 1, we mainly aimed to formulate a new scale of Chinese vocational interests and explore its basic structure.
Method
Item Generation
In order to build a comprehensive item pool of contemporary Chinese vocational interests, the items forming the scale came from two different sources: one part was generated from descriptions produced by a sample of Chinese students and the other part consisted of items from existing vocational interest inventories.
Considering the main purpose of the Chinese vocational interest scale is to help young Chinese, especially those at college/university levels at the starting point of a career, to find out their job preferences, the source of item pool was targeted at typical college students. First, we administered a survey to a sample of 327 undergraduates. The participants were junior students from three educational psychology classes. Because educational psychology is a public required course open for all students who want to obtain a National Teacher Certificate, students were distributed throughout various departments with different majors. The survey asked the participants to imagine a perfect situation where they could live a life as they wanted, and to choose a dream job. Then participants were required to list at least three activities they thought they would most like to engage in under this imaginary working situation. From this procedure, we obtained a total of 291 unique brief descriptions of activities. An example of a student's response was ‘edit video clips’.
Second, the responses were coded into items and the frequency of each item was counted. Then items under the same kind of activity with minor differences were merged. For instance, ‘write a poem’ and ‘write a piece of prose’ were combined into ‘create literary works’. Third, items were sorted in descending order depending on the frequency. Only the items with a frequency no lower than 5 were retained, and 70 items remained.
Fourth, we used 66 items from the ‘Activities’ subtest of the SDS (Holland, Reference Holland1994) as the other part of item resource, considering its popularity. The total 136 items were examined carefully by two psychometric professionals and seven psychology undergraduates. Repeated items and outdated items were deleted, and ambiguous expressions were modified.
Finally, we formed a new item inventory with 96 items. Further, four identical items were added to the end of the scale to check whether the participants rated the questionnaire seriously.
With regard to response format, we chose the 1–6 Likert-type (1 = strongly dislike; 6 = strongly like) via asking participants the degree to which they would enjoy the activities described by the items. When assessing vocational interests, the intention was to understand respondents’ magnitude of preferences, instead of having them make choices between items (Schermer, Reference Schermer2012). Also, the even multipoint Likert scale is better suited for multivariate statistical methods (such as factor analysis) rather than forced-choice measures (or ipsative measures) (Baron, Reference Baron1996) as it reduces the tendency for respondents to select a neutral attitude (e.g., scale midpoint). Therefore, individual items were rated using a 6-point Likert scale with no midpoint.
Participants
The original Chinese Vocational Interests Scale of 100 items was administered to 1,110 participants. Using the four repeated items, we were able to confirm whether participants had completed these items faithfully. After excluding those participants with inconsistent responses on repeated items (the discrepancy between any two identical items cannot be greater than 2), 989 participants (89.10%) were included in the analysis.
The final sample consisted of 989 college students from six different universities across northern and southern China. The participants’ majors covered a wide range of professional fields, such as mathematics, clinical medicine, public administration, international trade, Chinese literature, and art and design.
Of the participants, 441 students were female (44.6%), 460 were male (46.5%), and 88 students did not report their gender (8.9%); 629 were freshmen (63.6%), 175 were sophomores (17.7%), 86 were junior students (8.7%), 1 was senior student (0.1%), and the remaining 98 students (9.9%) did not report their grade.
Statistical Analysis
The responses to the 96 original items in the Chinese Vocational Interests Scale were submitted to an exploratory factor analysis (EFA) in Mplus 7.11, applying the recommended GEOMIN oblique rotation (Muthén & Muthén, Reference Muthén and Muthén1998–2012). In terms of normality, the absolute values of skewness for all 96 variables were under 1.0, and 93 variables had an absolute value of kurtosis smaller than 1.0 (the other 3 variables had an absolute value of kurtosis under 1.5). Considering the normality and the lack of a midpoint in the data (i.e., 6-point scale used), the Weighted Least Square Parameter Estimates with standard errors and mean- and variance-adjusted (WLSMV) chi-square test statistic was used in order to get more veracious estimation (Finney & DiStefano, Reference Finney, DiStefano, Hancock and Mueller2013; Muthén & Muthén, Reference Muthén and Muthén1998–2012). The rate of missing data was no more than 0.3%, and the default mode of using all available data was employed (Muthén & Muthén, Reference Muthén and Muthén1998–2012). Model fit indices including chi-square, root mean square error of approximation (RMSEA), comparative fit index (CFI), Tucker-Lewis index (TLI) and standardised root mean square residual (SRMR) were adopted to evaluate model fitness.
Results
The data produced 17 eigenvalues larger than 1.0 (between 20.467 and 1.029). Among these, 9 eigenvalues were larger than 2.0 and 6 eigenvalues were larger than 3.0. An inspection of the scree plot (Cattell, Reference Cattell1966) suggested that 9- to 11-factor solutions should be considered. Based on these results, as well as the four-dimension structure from previous studies (Tracey & Rounds, Reference Tracey and Rounds1996a, Reference Tracey and Rounds1996b), we examined nine models, with 3 to 11 factors being extracted to determine the number of factors in the data (Fabrigar, Wegener, MacCallum, & Strahan, Reference Fabrigar, Wegener, MacCallum and Strahan1999).
As presented in Table 1, fit indices supported the 9-factor model as most appropriate for the current data. The 9-factor model exhibited acceptable fitness (Hu & Bentler, Reference Hu and Bentler1999; McDonald & Ho, Reference McDonald and Ho2002), which was substantially better than the 8-factor model (ΔCFI = 0.021), and comparable to the 10-factor model (ΔCFI = -0.013; Cheung & Rensvold, Reference Cheung and Rensvold2002; Meade, Johnson, & Braddy, Reference Meade, Johnson and Braddy2008). Moreover, when we investigated the rotated factor loadings of each item in the 10-factor model, only five items loading on the tenth factor exceeded 0.30, none of the five values was beyond 0.45, and three of the items had cross loadings (loaded at or above 0.3) on more than one factor. The same pattern appeared for the 11-factor model, with only five items loading between 0.30 and 0.50 on the 10th and 11th factors respectively, indicating that a latent structure of more than 9 factors was not sufficiently succinct or interpretable. Therefore, the 9-factor solution was employed in view of the goodness of fit and the interpretability of solutions (Fabrigar et al., Reference Fabrigar, Wegener, MacCallum and Strahan1999).
Summary of Fitness Statistics for Contrasting Alternative Models of the Scale With 96 Items (n = 989)
Note: RMSEA = root mean square error of approximation; CI = confidence interval; SRMR = standardised root mean square residual; CFI = comparative fit index; TLI = Tucker-Lewis index.
**p < .01.
Items with all factor loadings under 0.30 were viewed as a poor fit to the factor structure, and items with cross loadings were treated as not interpretable. These items were deleted from further analyses. Also, considering the length of the scale, the reduction of items was necessary for the purpose of avoiding some measurement issues like boredom or fatigue with long scales. We further selected the items carefully following three rules: (a) the loading of the item on the intended factor should be relatively high; (b) the item-subscale total correlation of the item should be relatively high; (c) the content of the items under the same factor should be representative and heterogeneous as much as possible. Finally, 54 items from the Chinese original scale were retained with six items under each factor. The goodness of the model fit is shown in Table 2.
Summary of Fitness Statistics of the Nine-Factor Model With 54 Final Items (n = 989)
Note: RMSEA = root mean square error of approximation; CI = confidence interval; SRMR = standardised root mean square residual; CFI = comparative fit index; TLI = Tucker-Lewis index.
**p < .01
We initially defined nine factors as Artistic (A), Biotic (B), Conventional (C), Expressive (X), Investigative (I), Operational (O), Social (S), Enterprising (E), and Adventurous (V). Table 3 shows the contents and loadings of the 54 items on each of the nine factors (please find the English and Chinese wordings of the items in the Appendix). Table 4 depicts the descriptive statistics, correlations, and internal consistency reliabilities of the resulting subscales.
EFA Rotated Factor Loadings of the 54 Items of the Chinese Vocational Interests Scale (n = 989)
Note: Factor loadings greater than .30 in boldface type. These items were in Chinese when used in testing.
The Internal Consistency Reliability, Means, Standard Deviations and Correlation Matrix of the Nine Subscales for the EFA Sample (n = 989)
Note: Subscales’ correlations were reported.
*p < .05
Discussion
In study 1 we developed a new interests scale, the Chinese Vocational Interests Scale, with 54 items. The results of the EFA showed that the vocational interests of the Chinese sample yielded nine factors. These factors are detailed below. The first factor, Artistic (A), measures whether individuals like activities where imagination and creativity are needed, and whether they like to pursue artistic values and beauty. Examples of relevant occupations are writers, photographers, and graphic designers. The second factor, Biotic (B), measures whether individuals have a great interest in living things and the nature. People with a relatively higher level of Biotic like to raise and observe the growth of animals and plants. Examples of relevant occupations are agricultural researchers, horticulturists, and animal trainers. The third factor, Conventional (C), measures whether individuals like highly rational, regular, and systematic activities. People of this kind prefer well-regulated environments. Examples of relevant occupations are actuaries, auditors, and secretaries. The fourth factor, Expressive (X), measures whether individuals like being in public, being the focus of attention, and influencing the public. Examples of relevant occupations are emcees, actors, and reporters. The fifth factor, Investigative (I), measures whether individuals are filled with curiosity, highly critical, and prefer to solve problems by observing, analysing, and reasoning. Examples of relevant occupations are scientific researchers, medical researchers, and communication engineers. The sixth factor, Operational (O), measures whether individuals like activities requiring handcraft, operation of tools, and the use of materials in order to make objects. Examples of relevant occupations are surgeons, construction engineers, and machinists. The seventh factor, social (S), measures whether individuals like social interactions and helping others, as well as communicating with others. Examples of relevant occupations are social workers, middle school teachers, and football coaches. The eighth factor, Enterprising (E), measures whether individuals like to manage and control others’ thoughts and behaviours. People with a relatively higher level of Enterprising are usually sensitive to economic benefits. They often want to take power and dominate social resources. Examples of relevant occupations are managers, government administrators, and chief executive officers (CEOs). The ninth factor, Adventurous (V), measures whether individuals like highly challenging activities and taking risk. People of this kind are interested in sports and outdoor activities. Examples of relevant occupations are professional sports people, firemen, and lifesavers.
STUDY 2
The aim of study 2 was to replicate the 9-factor model from study 1 with CFA (Worthington & Whittaker, Reference Worthington and Whittaker2006). In addition, we provided more construct validity evidence by testing the correlations between the Chinese Vocational Interests Scale and the SDS, based on Holland's vocational interests theory (Holland, Reference Holland1994). We also provided reliability evidence with Cronbach's alpha and test–retest reliability.
Method
Participants
In this study, 1,118 participants completed the Chinese Vocational Interests Scale, Self-Directed Search and demographic information. After deleting cases with inconsistent responses on the repeated items (the discrepancy between any two identical items must not exceed 2), 970 participants (86.76%) were included in the final analysis.
The sample consisted of 970 college students from the same six universities across China as in study 1. Participants’ majors also presented diversity, such as Computer Science, Civil Engineering, Accountancy, Marketing, Nursing, and English. Among these participants, 432 students were female (44.5%), 439 students were male (45.3%), and 99 students did not report their gender (10.2%); 599 were freshmen (61.8%), 162 were sophomores (16.7%), 95 were junior students (9.8%), and 114 students (11.8%) did not report their grade.
Two classes of college students (86 students) were selected from the participants who had taken part in the previous investigation in order to retest the Chinese Vocational Interests Scale. Seventy-seven cases (89.53%) were included in the final sample of the retest (nine cases were excluded due to inconsistent responses on the repeated items). Of these, 46 participants were female (59.7%), 46 (59.7%) were freshmen, 30 (39.0%) were sophomores, and 1 was a junior student. The time interval of retest was 2 weeks.
Measures
The Chinese Vocational Interests Scale (VIS)
The nine-factor Vocational Interests Scale with 58 items (54 original items and 4 repeated items) developed in study 1 was used.
Self-Directed Search (Form R — 4th Edition; SDS)
The Activities subtest of the SDS (Holland, Reference Holland1994) was also used to measure vocational interests and to supply evidence for concurrent validity. This measure contains 11 items for each dimension and 66 items in total. Participants have to choose between ‘Like’ and ‘Dislike’ for each item (Like = 1; Dislike = 0). An example of the items is ‘Operate motorised machines or equipment’. To ensure the accuracy of translation, the scale was translated into Chinese, then blind back-translated into English, and translated into Chinese again by two researchers proficient in Chinese and English. The internal consistency of subscales ranges from .72 to .92, and the test–retest stability correlations ranges from .76 to .89 (Holland, Powell, & Fritzsche, Reference Holland, Powell and Fritzsche1997)
Statistical Analysis
The rate of missing data in this study was below 0.5%. All of the absolute values of skewness of the 54 variables were under 1.0, and 51 variables had an absolute value of kurtosis under 1.0 (the remaining three values were no larger than 1.5). Based on the same considerations as in study 1, the CFA was conducted by Mplus 7.11 with WLSMV and the default mode of handling missing data (Muthén & Muthén, Reference Muthén and Muthén1998–2012). Correlations among factors were freely estimated. The chi-square, RMSEA, CFI, and TLI were adopted as the four indexes to evaluate model fitness. The internal consistency reliability, test–retest reliability, and convergent validity were also examined with SPSS 18.0 using the ‘listwise’ method for removing missing data.
Results
Confirmatory Factor Analysis
The nine-factor model of the vocational interest scale was tested, and Table 5 showed that the model fit well to the data. RMSEA was below the accepted .05 cutoff for good fit (McDonald & Ho, Reference McDonald and Ho2002). CFI and TLI was above the accepted .90 cutoff (Hu & Bentler, Reference Hu and Bentler1999). All the items loaded significantly on the corresponding factor. Only two factor loadings fell below .60 (.52 and .51 respectively). Over half of the factor loadings were above .70 in this sample (see Table 6). As above, the results of the CFA provided us with good construct validity evidence for the Chinese Vocational Interests Scale.
CFA Model Fit Statistics for the Nine-Factor Chinese Vocational Interest Model (n = 970)
Note: RMSEA = root mean square error of approximation; CI = confidence interval; CFI = comparative fit index; TLI = Tucker-Lewis index.
**p < .01
Standardised CFA Factor Loadings for the Nine-Factor Chinese Vocational Interest Model (n = 970)
Note: Values in parentheses are standard errors of factor loadings.
Reliability
Internal consistency reliabilities of the subscales and test–retest correlations were found to be adequate (see Table 7).
Reliability, Means, Standard Deviations and Correlation Matrix of the Nine Subscales
Note: Subscales’ correlations were reported.
** p < .01; * p < .05.
Concurrent Validity
To assess the concurrent validity of the Chinese Vocational Interests Scale, we computed the correlations between the subscales of our Vocational Interests Scale with subscales of the SDS (Table 8). Due to the sample size (n = 970), most correlations were significant. If the new scale has high construct validity, similar dimensions in the new scale and types in SDS would show as least moderate correlations. Result found that the correlations of six pairs, including Realistic (equals Operational in the Chinese Vocational Interests Scale), Investigative, Artistic, Social, Enterprising, and Conventional did present moderate correlations, which were higher than others (see Table 9), as expected.
Means, Standard Deviations and Correlation Matrix of Self-Directed Search (SDS)
Note: Subscales’ correlations were reported. H_Realistic, H_Investigative, H_Artistic, H_Social, H_Enterprising, H_Conventional are the six dimensions in the Self-Directed Search (SDS).
**p < .01; *p < .05.
Correlations of the Subscales Between the Chinese Vocational Interests Scale and the Self-Directed Search
Note: H_Realistic, H_Investigative, H_Artistic, H_Social, H_Enterprising, H_Conventional are the six dimensions in the SDS.
**p < .01; *p < .05.
Discussion
In study 2, we confirmed the construct validity of the Vocational Interests Scale. The results of a CFA revealed that the 9-factor model fit the data well. Then, we computed the internal consistency reliabilities of the scale and found all the subscales were reliable enough, with most of the Cronbach's alphas above .70. Evidence from convergent validity supported the construct of the Chinese Vocational Interests Scale. Specifically, similar types and dimensions (Realistic, Investigative, Artistic, Social, Enterprising, and Conventional) between the Holland's model and the new developed scale showed the highest correlations.
General Discussion
We used an emic approach to develop an item pool of 96 indigenous vocational interests, then explored and validated the structure of these items with a factor analytic approach. In the item generation phase, we used an open-ended survey to produce new items and also referred to an existing instrument in order to obtain a comprehensive representation of Chinese vocational interests. The EFA results yielded nine meaningful factors, and the CFA results proved good fit of the nine-factor model to another sample in China. All the internal consistency reliabilities and most of the test–retest correlations of the subscales were above 0.70. The correlations of resembling subscales between the new scale and the SDS were relatively higher, providing convergent validity. In conclusion, the present study brought an expansion to the view of vocational interest research with an emic approach from a cross-cultural perspective, and the Chinese Vocational Interests Scale was found to have good psychometric properties and therefore could be used as an applicable and relatively short measure of vocational interests for Chinese populations.
The results of the present study indicated that there were nine latent dimensions of young Chinese people's vocational interests: Artistic (A), Biotic (B), Conventional (C), Expressive (X), Investigative (I), Operational (O), Social (S), Enterprising (E), and Adventurous (V). The six RIASEC interest types from Holland's model were included in the new model; for example, the dimension ‘Operational’ (O) in the nine-factor model is quite similar to the type ‘Realistic’ (R) in the Holland's model, both referring to a preference for practical works requiring operating tools and using machines. However, the nine-factor model in the present study is totally different from the Holland's RIASEC model in methodology, and consequently, the meaning of those vocational interests of two models are not the same even though they have similar descriptions. In the present study, researchers assumed that occupation preference reflected personal traits, so we could extract latent attributes behind different vocational activities; for example, the factor called ‘Social’, which reflects interest in social services and prosocial behaviors, and those who obtain a high score in this factor are usually outgoing and helpful.
There were three dimensions — Expressive (X), Adventurous (V), and Biotic (B) — simultaneously presented in the Chinese sample compared to Holland's RIASEC model. The appearance of each of the three dimensions is buttressed by indirect evidence from the literature.
The presence of the dimension ‘Expressive’ complies with the dimensions of the Jackson Vocational Interest Survey (JVIS; Jackson, Reference Jackson1977, Reference Jackson2000), whose reliability and validity has been confirmed by Schermer and MacDougall (Reference Schermer and MacDougall2011). A distinct dimension of ‘Performing Arts’ (similar to ‘Expressive’ here) should be separated from ‘Artistic’ to describe those who enjoy performing in front of an audience. We believe that there are social reasons for the emergence of the ‘Expressive’ dimension. The prosperity of the entertainment industry and the prevalence of Fan Culture have had a significant impact on teenagers and young adults, making them long for the opportunity to present themselves and become the focus of attention. When becoming an idol becomes an actual profession, it is better to recognise the dimension of ‘Expressive’ to help us understand those who prefer to perform in public and influence others through their performance and personal charm.
As for the dimension ‘Adventurous’, this is included in the Oregon Vocational Interest Scales (Pozzebon, Visser, Ashton, Lee, & Goldberg, Reference Pozzebon, Visser, Ashton, Lee and Goldberg2010) as one of eight major dimensions, and is also included in the Campbell Interest and Skills Survey as one of its seven orientations. This dimension reflects a different and important aspect of ‘Realistic’ in Holland's RIASEC model, which involves activities requiring risk taking, physical endurance, and excitement seeking. In fact, society is always in need of risk-taking occupations such as firemen and aviators. Besides, many extreme sports have become popular in China. Therefore, we cannot ignore this dimension of ‘Adventurous’ that focuses on people's orientation toward pursuing excitement and challenges.
In terms of the dimension ‘Biotic’, a previous study derived from Chinese samples suggested a similar type, ‘Natural’, to add to Chinese vocational interests (H. Zhang et al., Reference Zhang, Feng and Yuan2004). The eight-type model from the Personal Globe Inventory also includes the ‘Nature/Outdoors’ basic type (Y. Zhang et al., Reference Zhang, Kube, Wang and Tracey2013). The presence of this dimension may be a result of the demand for environmental protection. The Chinese government has taken the issue of ecological conservation more seriously because of rapid urbanisation and industrial development, not to mention that it is already a global issue. This country, and even the world, is calling for more professionals in eco-industries such as eco-breeding or forestry, and some new professionals, such as environmental engineers, have emerged. Leadership from government will transfer more public attention to nature to facilitate biotic-related job availability. This job availability may further encourage young students to freely develop their passion for the natural environment. Thus, the Biotic dimension will have its place in Chinese general vocational interest categories.
Cross-cultural research on vocational interests using cluster and factor analytic approaches has shown divergence from the RIASEC types. It is judicious to always keep the measurement of vocational interests veracious and in accordance with our times and our societies. Liu and Rounds (Reference Liu and Rounds2003) examined the fitness of five of Holland's RIASEC related models in China, but did not find adequate support for the six vocational interest types. Einarsdóttir, Eyjólfsdóttir, and Rounds (Reference Einarsdóttir, Eyjólfsdóttir and Rounds2013) identified eight broad interest categories in Iceland that differ from RIASEC types and partly converge with the Chinese categories in the present study. Primavera et al. (Reference Primavera, Church, Katigbak, Bruna, White and Peradilla2010) identified nine broad interest categories in the Philippines, which is quite different from the Chinese categories. And factor analytic research in the United States also did not find the common interest factors in different populations with a similar culture (Liao, Armstrong, & Rounds, Reference Liao, Armstrong and Rounds2008; Rounds, Reference Rounds, Lubinski and Dawis1995).
This exploratory research also has its limitations. First, although the SDS had been criticised for its unfitness in Chinese culture, we nevertheless had to choose it as an indicator of construct validity. This was because that we could not find a suitable vocational interest scale in China or a better scale than the SDS, which is well constructed and has been validated in the United States and other countries. As a result, the validity of the nine-factor model needs to be verified with more evidence, especially regarding criterion-related validity. We recommend various criteria be used at the same time (e.g., job satisfaction, job selection, and achievement in career). Second, the psychometric invariance of the present model is waiting to be tested under diverse populations, rather than be limited to the college students group as in the present study. Third, although this study has initially proved the existence of the nine-factor model of Chinese vocational interests, its spatial structure still remains unknown. Future studies could keep exploring the vocational interests in China and uncover its spatial structure.
Appendix
54 items in the Chinese Vocational Interests Scale (English version)
54 items in the Chinese Vocational Interests Scale (Chinese version)
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