An afterword: the utility of cognitive models for the field of psychopathology

Cognitive models of psychopathology provide opportunities and challenges for both the research psychopathologist and the clinician concerned with practical applications to individuals. Heterogeneity of individual pathology within diagnostic categories, heterogeneity of content within symptom categories, undue reliance on judgment-based ratings, and frequent emphasis on deficit rather than the overt behavior of the patients are some of the major issues. Others include the complex interaction between cognitive and affective processes and the fact that input-output functions are often nonlinear and marked by critical threshold values for the appearance of overt pathology. An important feature of models is the discipline that they introduce into theorizing about psychopathology plus the focus on precise quantification.     

A Psychometric Normative Database for Pre-Lung Transplantation Evaluations

This study describes the quality of life and psychological characteristics of a large sample (N = 201) of adult patients evaluated for lung transplantation. In light of the interdisciplinary nature of pre-lung transplant evaluations, establishing norms for measures commonly used in the assessment of transplant candidates has been a priority for the University of Florida transplant programs. Forty-eight percent of the patients reported symptoms of mild to moderate depression. Although quality of life indices were associated with disease severity and exercise tolerance, psychosocial measures generally were not. These data contribute uniquely to the transplant literature and provide valuable normative information on the largest lung transplant cohort reported to date.     

Development of a Patient Adherence Scale for Exposure and Response Prevention Therapy

Exposure and response prevention (EX/RP) is an evidence-based treatment for obsessive-compulsive disorder (OCD). For EX/RP to be maximally effective, it is believed that patients must adhere outside of sessions to the procedures they learn in therapy. To date, there is no standard measure of patient EX/RP adherence, despite the importance of accurately assessing EX/RP adherence in both clinical research and practice. This paper describes the development of the Patient EX/RP Adherence Scale (PEAS), which assesses the patient's between-session adherence to the therapist's EX/RP instructions, and presents initial data on the scale's reliability and validity. The scale was designed to focus on the key procedures of EX/RP and to be brief enough to be used at each treatment session. The scale demonstrates excellent interrater reliability and good face and content validity. The usefulness of the scale is considered in the context of being an important tool to researchers trying to understand and improve outcomes of EX/RP for OCD as well as to EX/RP therapists in clinical practice. Future research will need to test the scale's reliability and validity in a larger sample of patients over the course of treatment.     

The Concept of Inductive Probability

The word ‘probability’ in ordinary language has two different senses, here called inductive and physical probability. This paper examines the concept of inductive probability. Attempts to express this concept in other words are shown to be either incorrect or else trivial. In particular, inductive probability is not the same as degree of belief. It is argued that inductive probabilities exist; subjectivist arguments to the contrary are rebutted. Finally, it is argued that inductive probability is an important concept and that it is a mistake to try to replace it with the concept of degree of belief, as is usual today.     

Psychometric schizotypy and motor performance

Motor abnormalities have long been a focus in discussions of schizophrenia. The present study used a newly developed line drawing task to examine fine motor performance and psychometrically assessed schizotypy in a large, randomly ascertained sample of young adults (N = 120) with no history of psychosis. Poor motor performance on the line drawing task, indexed by root-mean-square error (RMS), was significantly related to 4 separate psychometric measures of schizotypy in the overall sample. The psychometric schizotypy-RMS association remained significant for 2 of the schizotypy measures even when the effects of intellectual functioning, mental state factors, and sustained attention were statistically controlled in a regression analysis. The status of the line drawing index as a schizophrenia liability measure is discussed.