Anti-stigma films and medical students’ attitudes towards mental illness and psychiatry: randomised controlled trial

AIMS AND METHOD To explore the feasibility of a randomised controlled trial of the effects of two anti-stigma films on medical students’attitudes to serious mental illness and psychiatry. Attitudes to serious mental illness, perceived dangerousness, social distance and psychiatry, were measured before and after watching the films and at 8 weeks. RESULTS Intervention films significantly improved general attitudes to serious mental illness and social distance, with a trend towards reducing perceived dangerousness. These effects appeared to attenuate during the students’ clinical placements, suggesting a possible interaction with their clinical experiences. CLINICAL IMPLICATIONS Our results suggest both that it may be possible to conduct a substantive trial of the effects of the intervention films on a larger cohort of medical students and that the films may be effective in reducing stigmatising attitudes in medical students.

Anti-stigma films and medical students' attitudes towards mental illness and psychiatry: randomised controlled trial

AIMS AND METHOD
To explore the feasibility of a randomised controlled trial of the effects of two anti-stigma films on medical students'attitudes to serious mental illness and psychiatry. Attitudes to serious mental illness, perceived dangerousness, social distance and psychiatry, were measured before and after watching the films and at 8 weeks.

RESULTS
Intervention films significantly improved general attitudes to serious mental illness and social distance, with a trend towards reducing perceived dangerousness. These effects appeared to attenuate during the students'clinical placements, suggesting a possible interaction with their clinical experiences.

CLINICAL IMPLICATIONS
Our results suggest both that it may be possible to conduct a substantive trial of the effects of the intervention films on a larger cohort of medical students and that the films may be effective in reducing stigmatising attitudes in medical students.
The stigma and discrimination associated with mental illness continue to blight the lives of those so diagnosed (Corrigan & Penn, 1999;Hayward, 1997;Crisp et al, 2000), despite extensive attempts to counter their effects (Estroff et al, 2004;Sartorius & Schulze, 2005). Given that medical professionals are inevitably embedded in the fabric of society it is perhaps unsurprising that they can also hold stigmatising attitudes (Ûc ok et al, 2004) and thus contribute to discrimination (Byrne, 1999;Crisp et al, 2000). Indeed, surveys of mental health service users have revealed a relatively high prevalence of stigma and discrimination from healthcare professionals (Wahl, 1999). Although several studies have found that medical students and doctors often regard psychiatric patients as difficult and unrewarding to treat (Nielsen & Eaton, 1981;Lawrie et al, 1998), other research has reported that medical students' attitudes towards mental illness and psychiatry become more positive following undergraduate training (Creed & Goldberg, 1987;Singh et al, 1998), particularly where that training involves both patient contact and education about the effects of stigma (Corrigan & Penn, 1999). Given the labour-intensive nature of existing anti-stigma interventions (Pinfold et al, 2003) and the power of audiovisual media to influence societal constructions of mental illness (Wahl, 1995), researchers have postulated that documentary films depicting people diagnosed with mental health problems may offer a more efficient approach to reducing stigma and discrimination among student groups (Penn et al, 2003). Indeed, existing research suggests that antistigma films can garner small and temporary improvements in specific areas such as social distance (Chung, 2005;Altindag et al, 2006), though with little change in general attitudes (Penn et al, 2003). This latter finding was attributed to the lack of an unambiguous disconfirmation of the mental illness stereotype within the film deployed (Penn et al, 2003). We sought to determine the effects of an anti-stigma intervention based on films produced by mental health service users and combining both education and stereotype disconfirmation elements, on medical students' attitudes to both serious mental illness and psychiatry.

Study design
The study was conceived as a pilot project to refine the research methodology in anticipation of a larger scale trial. The two anti-stigma films used were made in partnership with non-statutory mental health organisations in Nottingham. Participants were 4th year medical undergraduates on their psychiatry training attachment.
We used a single-masked, randomised controlled trial design to compare a group who watched the intervention films with a group who watched a control film of the same format and length. We tested whether general attitudes to serious mental illness changed in the intervention group, whether the films changed specific attitudes concerning social distance, perceived dangerousness, and psychiatry. After baseline assessment, participants were randomised to either intervention or control groups and were then reassessed immediately after watching the films, and again at 8 weeks post-intervention. Ethical approval for the study was granted by the University of Nottingham Medical School research ethics committee. Written informed consent was not required as the project was an assessment of an educational intervention, although students were assured that their responses would have no influence on their grades or exam scores.

Intervention and control films
The first film, A Human Experience (Smith, 2005), was made in collaboration with service users at Rethink Nottingham. It is 15 min long and adopts a 'talking head' documentary style approach. Its content revolves around three mental health professionals (a teacher/researcher, a Mental Health Act Commissioner and a psychiatrist) discussing their experiences after being diagnosed with a serious mental illness (psychosis, schizophrenia and severe depression -all of which resulted in hospitalisation) and, in particular, their experiences of stigma and discrimination. The film challenges particular stereotyped beliefs, including dangerousness, inability to work and inability to maintain relationships, and mentions positive aspects of serious mental illness (such as the importance of the experience of mental distress in the forging of personal identity, a sense of overcoming adversity, the celebration of difference, and a formulation of mental distress as a deepening of lived experience). The second film, A Day in the Mind of . . . (Green, 2005), was made by service users at Framework Housing Association Nottingham (a non-statutory organisation providing practical and emotional support for people experiencing mental distress and living in the community). It is 12 min long and adopts a first-person perspective throughout. Its narrative focuses on the subjective experience of psychosis over the course of a typical day. The film attempts to convey to the viewer the first-hand experience of being diagnosed with a serious mental illness, thereby challenging the stereotype of psychosis as a condition opaque to understanding. The control film was a 25-min documentary unrelated to mental illness or psychiatry and matched for visual format.

Outcome measures
. General attitudes to serious mental illness, as measured by the AttitudesToward Serious Mental Illness Scale -Adolescent Version (Watson et al, 2005), a 21-item validated measure of general attitudes in young people where higher scores indicate more negative attitudes. . Perceived dangerousness, measured by the Dangerousness Scale (Link & Cullen,1986), a 5-item questionnaire with good internal consistency where ratings are made on a 5-point Likert scale, with higher scores indicating greater perceived dangerousness. . Social distance, measured by the Social Distance Scale (Penn et al,1994), a 6-item questionnaire with good internal consistency where higher scores are indicative of a tendency to maintain a greater social distance from people diagnosed with a serious mental illness. . Attitudes to psychiatry, measured by the Attitudes to Psychiatry Scale (Burra et al,1982), a well-validated 30-item questionnaire where higher scores indicate a more positive attitude towards psychiatry.
In addition to the main outcomes we also collected data on students' previous contact with people diagnosed with a mental illness, affect at the time of assessment, and behavioural intentions towards such people.

Procedure
At baseline, on the first day of their psychiatric attachment, participants self-completed all four outcome measures. After baseline assessment, they were randomly allocated using a concealed randomisation method. Those randomised to the intervention group watched the two films on the second day of the attachment and the control group watched the control film. The outcome measures were repeated immediately postintervention and at 8 weeks follow-up, at the end of the psychiatry attachment. Statistical analyses were undertaken by an independent researcher masked to allocation status and all participants were asked not to reveal their group allocation. They were analysed on an intention-totreat basis, with Mann-Whitney U-tests employed to compare non-parametric data and independent samples t-tests used for parametric data. All results were corrected using the Bonferroni method to adjust for multiple comparisons. There was evidence that at baseline and post-intervention time points there had been confusion over the polarity of the rating scale for the Attitudes to Psychiatry questionnaire and scores were discarded for these time points. The rating scale was clarified in the final administration of the Attitudes to Psychiatry questionnaire and the 8 weeks follow-up scores were analysed.

Results
Although 82 medical students were eligible to participate in the trial, only 46 took part (56%) and were randomly allocated, 23 to each of the study arms (Fig. 1). Almost three-quarters of the sample were female (n=34; 74%) and the mean age was 21 years. A great majority (n=37; 80%) were White European; 28 (60%) had previous contact with a person diagnosed with a serious mental illness. There were no significant differences between the groups at any of the three assessment time points (Table 1). However, inspection of the data suggested some changes within groups and therefore for each group the scores for total attitudes to mental illness, dangerousness and social distance were analysed to determine whether they changed significantly over time, using a Friedman test. Post hoc Wilcoxon matched-pairs test was then used to determine between which time points the significant differences were located. Figure 2 shows that, with regard to total score for attitudes to mental illness, there was a significant change in score in the intervention group over the three time points (n=23, d.f.=2, P=0.026), with scores demonstrating a significant decrease from baseline to post-intervention (z=72.614, P=0.009) suggesting that students' attitudes were less stigmatising after the intervention. There was a trend towards significance for scores to increase from postintervention to 8-week follow-up (z=71.916, P=0.055), suggesting that this anti-stigma effect attenuated over time. Figure 3 demonstrates that there were significant changes in perceived dangerousness scores over the three time points in the intervention group (n=23, d.f.=2, P=0.062), with scores decreasing significantly from baseline to post-intervention (z=72.782, P=0.005). There was no significant difference in scores from the post-intervention to 8-week follow-up time points, suggesting there was less attenuation than for general attitudes. Figure 4 shows that there was a significant change in social distance scores in the intervention group over the three time points (n=23, d.f.=2, P50.0001), with a highly significant decrease in social distance from baseline to post-intervention (z=73.546, P50.0001). This suggests that the students' inclination to be socially distant from people diagnosed with a serious mental illness lessened after watching the films, though this was not sustained at follow-up, with scores significantly increasing (z=72.169, P=0.03). No significant differences in the scores for either total attitudes to mental illness, dangerousness, or social distance were found between each time point for the control group.

Discussion
On the whole, the study was successful, with several methodological problems being highlighted; not least of these being the fact that only 56% of potential   participants eventually agreed to take part, thereby making the study vulnerable to type II error and introducing a selection bias. The effects of this lack of power are most tellingly revealed by the absence of any significant between-group differences (with any specific differences being overwhelmed by the much greater variance of individual participants' characteristics in between group comparisons). However, this attrition rate compares favourably with those of some recent reports of randomised controlled trials in the mainstream psychiatric literature (Wykes et al, 2007). Strengths of the study were the use of self-report questionnaires and data analysis masked to group membership which both served to minimise possible assessment bias.
Comparisons with existing normative data (derived in the main from US studies) suggest that, at baseline, participants in the present study both held more stigmatising attitudes towards serious mental illness and were more inclined to maintain social distance from people diagnosed with such illness (Watson et al, 2005;Penn et al, 1994) than the general population, but they also appeared to view them as less dangerous (Link & Cullen, 1986). Although the possibility of confounding caused by differences in sociocultural context must be considered when interpreting research results, it is unlikely that cultural differences would have wholly accounted for these discrepancies. The participants maintained attitudes to psychiatry consonant with previous evaluations of medical students in Nottingham (Singh et al, 1998). The former findings appear to be supported by research examining the extent to which mental health professionals stigmatise their patients (Lauber et al, 2006). Interestingly, the latter finding would appear to be at odds with the same work which found that mental health professionals are as likely as the general population to stereotype people diagnosed with mental illness as dangerous. This dissonance may reflect a selection bias, but the fact that this apparently 'untypical' group exists may be important, given that the intervention films were able to further reduce perceived dangerousness in a group with relatively benign extant attitudes. It was considered unfeasible to conduct subgroup analyses (such as by gender) because of the study's lack of power. Any subsequent research can remedy this and can also seek to examine the impact of the films on participants with more negative attitudes towards dangerousness.
The within-group results, though highly provisional, are encouraging, suggesting that the intervention films may improve medical students' attitudes to serious mental illness and decrease perceived dangerousness and social distance. However, our results suggest that the effects on general attitudes and social distance were attenuated over the 8-week attachment in psychiatry.
Kerby et al Medical students' attitudes towards mental illness and psychiatry original papers  Although no firm conclusions can be drawn from our data, this may have been due to the effects of the attachment, and any subsequent investigation may include both quantitative and qualitative attempts to understand how the films and experience of medical education within a psychiatric service interact. Further research is needed to investigate strategies to sustain these short-term improvements in students' attitudes to people with serious mental illness, perhaps with an emphasis on the importance of the patient experience, as has been argued elsewhere (Yang et al, 2007). Such strategies might also include 'booster' films designed to mitigate the corrosive effects of time and experience. A further substantive trial is currently being planned, with the intention of recruiting sufficient numbers of medical students to definitively answer some of the tantalising questions opened up by this pilot work.