The term quality of life (QOL) generally refers to the overall evaluation of an individual's life condition, on both objective and subjective dimensions. Quality of life research has focused on global evaluations of life satisfaction in adults. The life quality of adolescents and the performance of central life domains have largely been ignored. This study describes the psychometric properties of the Comprehensive Quality of Life Scale (ComQol) with an adolescent sample. In line with recent conceptualisations of QOL, ComQol assesses subjective and objective QOL on seven life domains. ComQol was administered along with two other self-report instruments (measuring fear and anxiety) to a sample of 264 school-based adolescents aged between 12 and 18 years. The scale yielded life satisfaction data that lay within the normative range for adults. Test-retest reliability and internal consistency analyses indicated that the scale has adequate reliability. In support of convergent validity, fear and anxiety were generally found to be significantly associated with lower levels of life quality. The present study supports the psychometric adequacy of ComQol as an instrument to measure the life quality of adolescents.

Clinical reasoning is one of the central components of psychological assessment. The identification of a client's psychological difficulties and the subsequent depiction of their onset, development, and interrelationships enables clinicians to plan treatment in a systematic and effective manner. In a recent paper (Ward & Haig, 1997), we presented an abductive theory of method and showed how it offered a useful framework for highlighting and integrating the major phases of psychological assessment. These phases involve detecting clinical phenomena, postulating psychological mechanisms, developing a case formulation, and evaluating a case formulation. In this paper we outline the abductive theory and elaborate on the related clinical dimensions of assessment, while illustrating them with an ongoing case example.

Evidence suggests that there are substantial costs (in a variety of spheres: personal, social, financial, etc.) associated with psychotic relapse. Furthermore, relapse increases the likelihood of future relapses and increased costs. This paper explores the application of a model of relapse prevention (RP) outlined by Marlatt and Gordon (1985) to the field of psychosis. The original model was designed to help individuals who abuse substances to maintain control over their habit. The advantages and limitations of applying the original model to the prevention of psychotic relapse are explored in detail in the context of an amended model. One major advantage of the RP model is that it provides a framework for the coordination of treatment interventions. The complex intervention packages, which may be useful in the management of psychotic illnesses, are described. The RP framework may be used to coordinate treatments in a manner that maximises their potential and emphasises patient control.

The present study evaluated the efficacy of an Assertive Community Treatment (ACT) program for the seriously mentally ill. Outcomes of the program were assessed at baseline and 12-month follow-up and were compared with that of a control group, which received standard community care. Thirty-six subjects with serious mental disorders participated in the study. Dependent measures included number of hospital admissions and hospital bed days per year, life skills, quality of life, and psychiatric symptoms. Results of 2 x 2 (treatment/control group x baseline / 12-month follow-up) repeated measures ANOVAs indicated that, after 1 year, both treatments lead to a significant reduction in hospital admissions and bed days, and to improvement in life skills. ACT subjects evidenced a greater decrease in psychiatric symptoms compared to control group subjects. In general, markedly more ACT subjects showed reliable clinical change in life skills, quality of life, and psychiatric symptoms than control subjects. Although the ACT did produce greater clinical change than standard case management, it did not produce statistically greater improvement across most domains of functioning in the short term.

This paper undertakes a conceptual and methodological examination of construct validation from the viewpoint of a scientific realist philosophy of science. It is argued that there is an important need to revise our thinking about the methodology of construct validation and to incorporate the revisions into clinical psychological practice. After a brief characterisation of construct validation, the paper points out the inadequacies of operationalism and cautions against the heavy appeal to definitions in science. Thereafter, psychology's standard construct validation strategies of hypothetico-deductive testing and null hypothesis significance testing are criticised, and the importance of abductive reasoning for construct validation is spelled out.

There are many criticisms of the use of inferential statistics in behavioural research, including those made by Sidman (1960). This paper reports the frequency of use of inferential statistics in the Journal of the Experimental Analysis of Behavior in every fifth year from 1960. The usage is apparently growing. It is argued that is it time to return to appropriate experimental control.