ABSTRACT
Rasch analysis was used to illustrate the usefulness of item-level analyses for evaluating a common therapy outcome measure of general clinical distress, the Symptom Checklist-90-Revised (SCL-90-R; Derogatis, 1994). Using complementary therapy research samples, the instrument's 5-point rating scale was found to exceed clients' ability to make reliable discriminations and could be improved by collapsing it into a 3-point version (combining scale points 1 with 2 and 3 with 4). This revision, in addition to removing 3 misfitting items, increased person separation from 4.90 to 5.07 and item separation from 7.76 to 8.52 (resulting in alphas of .96 and .99, respectively). Some SCL-90-R subscales had low internal consistency reliabilities; SCL-90-R items can be used to define one factor of general clinical distress that is generally stable across both samples, with two small residual factors.
Subject(s)
Bipolar Disorder/diagnosis , Depressive Disorder/diagnosis , Models, Statistical , Psychiatric Status Rating Scales/statistics & numerical data , Psychotherapy/statistics & numerical data , Adult , Bipolar Disorder/psychology , Bipolar Disorder/therapy , Depressive Disorder/psychology , Depressive Disorder/therapy , Discrimination, Psychological/physiology , Female , Humans , Male , Psychometrics/methods , Reproducibility of Results , Stress, Psychological/diagnosis , Stress, Psychological/psychology , Stress, Psychological/therapy , Treatment OutcomeABSTRACT
Observer ratings were collected using instruments designed to measure the Diagnostic and Statistical Manual of Mental Disorders (4th ed.; American Psychiatric Association, 1994) personality disorders (Personality Diagnostic Questionnaire-4+ [PDQ-4+]; Hyler, 1994), the Big Five model (B5M; Goldberg's [1999] International Personality Item Pool), and Rorschach-derived constructs. For the latter, we revised the Rorschach Rating Scale (Meyer, Bates, & Gacono, 1999) to lower its reading level and renamed it the Rorschach Construct Scale (RCS) to emphasize its reliance on rated constructs. The RCS consists of 6 factors. Joint factor analysis of RCS, PDQ-4+, and B5M items also resulted in 6 factors: Self-Centeredly Exploitative, Poor Ego Resiliency, Extraversion, Task Conscientiousness, Openness to Ideas, and Emotional and Expressive Constriction. The first 2 factors received high loadings from RCS, PDQ-4+, and B5M variables. The sixth factor received high loadings from just RCS variables.
Subject(s)
Diagnostic and Statistical Manual of Mental Disorders , Models, Psychological , Observer Variation , Personality Disorders/classification , Rorschach Test , Adult , Female , Humans , Male , Psychiatric Status Rating Scales , United StatesABSTRACT
To test the hypothesis that higher scores on alexithymia are associated with reduced tolerance for cold pressor pain, 116 college undergraduates completed the Toronto Alexithymia Scale-20 of Bagby, Parker and Taylor and engaged in the cold pressor test. Their alexithymia scores were not associated with tolerance for cold pressor pain, suggesting that individuals scoring high on alexithymia do not show a general hypersensitivity to a cold stimulus.
