Seemingly Anomalous WISC-IV Full Scale IQ Scores in the American and Canadian Standardization Samples

The American and Canadian standardization samples for the fourth edition of the Wechsler Intelligence Scale for Children were used to ascertain the prevalence of “seemingly anomalous” Full Scale IQ (FSIQ) scores for all possible sums of scaled scores combinations of the Verbal Comprehension Index, Perceptual Reasoning Index, Working Memory Index, and Processing Speed Index. About 1% of FSIQ scores in both samples were anomalous (that is, fell outside the range of the four indices). Interestingly, the prevalence of anomalous scores was higher at the extremes of the FSIQ distribution. Moreover, anomalous FSIQ scores occurring above or below the mean of the FSIQ distribution (that is, 100) were larger or smaller, respectively, than any of the four indices. Furthermore, if the range of the four indices did contain the FSIQ (the non-anomalous case), when the FSIQ was below or above 100 it tended to be located distally in the half-segment of the range furthest below or above 100, respectively. A non-technical intuitive analogy from Olympic sports and a statistical explanation for the findings are provided. Important implications for practitioners are also presented. Portions of this paper were presented March 17, 2006 at the 20th annual Joseph R. Royce Research Conference, Department of Psychology, University of Alberta, Edmonton, Alberta.     

Comparison of Tetradic WAIS-III Short Forms in Predicting Full Scale IQ Scores in Neuropsychiatric Clinic Settings

Patients from two neuropsychology clinics (n = 283) were divided into model development (n = 189) and validation samples (n = 94) with proportional representation from each clinic. Three regression based models of four WAIS-III subtests were developed and cross-validated to evaluate their FSIQ estimation accuracy: (1) an optimized stepwise regression model derived from the development sample (Comprehension, Matrix Reasoning, Similarities, and Picture Arrangement), (2) an a priori WASI based model (Similarities, Matrix Reasoning, Vocabulary, and Block Design), and (3) an a priori model with relatively rapidly administered subtests from each Index Score factor of the WAIS-III (Information, Picture Completion, Arithmetic, and Digit Symbol-Coding). The models produced good (92 to 97%) FSIQ estimation accuracy within 10 points of FSIQ with none of these models performing significantly better than another. The utility of clinical use of short form FSIQ estimation is a function of accuracy needed versus administration time reduction and ease for the patient.     

The association between IQ in adolescence and a range of health outcomes at 40 in the 1979 US National Longitudinal Study of Youth

A link between pre-morbid intelligence and all cause mortality is becoming well established, but the aetiology of the association is not understood. Less is known about links with cause specific mortality and with morbidity. The aim of this study is to examine the association between intelligence measured in adolescence and a broad range of health outcomes ascertained at 40 years of age. We use data on 7476 participants in the US National Longitudinal Survey of Youth 1979 who had their cognitive ability measured at baseline and completed the ‘Health at 40’ interview module between 1998 and 2004. The Health at 40 module includes assessments of general health and depression, nine medically diagnosed conditions, and 33 common health problems. Higher mental test scores were associated with lower depression scores, better general health, significantly lower odds of having five of the nine diagnosed conditions and 15 of the 33 health problems. A health disadvantage of higher cognitive ability was evident for only three of the 33 health problems.     

Factor structure of the Brief Psychiatric Rating Scale for Children (BPRS-C) among Hospital Patients and Community Clients

The factor structure, reliability and concurrent validity of the Brief Psychiatric Rating Scale for Children (BPRS-C) was examined. The BPRS-C was designed to measure child psychopathology with seven scales consisting of three items each. Two large samples of intake assessments at admission to the public mental health system of state psychiatric hospitals (n = 6712) and community mental health centers (n = 21,459) for children aged 3–17 were examined. In both samples exploratory and confirmatory factor analysis found seven factors that generally supported the BPRS-C seven scale structure. Reliability as measured by internal consistency was acceptable with an average alpha of .72 (SD = .09). Mean scale scores across diagnoses and concurrent correlations with the Child Behavior Checklist (CBCL) were consistent with expectations.     

The Portuguese version of the Basic Empathy Scale (BES): Dimensionality and measurement invariance in a community adolescent sample

Empathy is the heightened ability to cognitively perceive and/or affectively share the emotions of others, which has been consistently associated with desirable social interactions. This paper aimed to test the bi-factorial structure of a Portuguese version of the Basic Empathy Scale and examine its variation by gender and age using a large community sample (n = 1029) of adolescents. The two-factor model, originally developed and supported by other cross-cultural validations, presented good fit indicators which was similar across genders and adolescent age groups. Girls were more empathic than boys and younger adolescents were more empathic than the older ones. Further support for the validity of the new scale comes from its relations to measures of social skills and aggression which were similar to theoretical predictions. In conclusion, the Portuguese version of the BES is a consistent and valid instrument for the assessment of empathy in samples of adolescents aged 12–18 years old in Portugal, which can now be used in cross-cultural studies of this important psychological construct.     

Comparing neurocognitive impairment in schizophrenia and bipolar I disorder using the Screen for Cognitive Impairment in Psychiatry Scale

The purpose of this study was to compare the psychometric properties of the Screen for Cognitive Impairment in Psychiatry (SCIP) when applied to patients diagnosed with schizophrenia (n = 126) or bipolar I disorder (n = 76), and also to compare the cognitive impairment in both samples of patients and a control group (n = 83) using the SCIP and a complete neuropsychological battery. The SCIP is a scale intended to quickly and easily assess cognitive impairment in patients with severe psychiatric disorders. The results showed firstly that, in terms of internal consistency, temporal stability, dimensional structure, and criterion-referenced validity, the SCIP provides reliable and valid scores at an equivalent level in both schizophrenia and bipolar I disorder samples. Secondly, it showed that differential cognitive impairment between the two patient groups occurs only in verbal memory, although the effect size of the difference is small. Finally, compared with the control group, cognitive impairment was present at all levels in both groups of patients using both the SCIP and the neuropsychological battery, which indicates that the SCIP is a good screening tool for cognitive deficits in schizophrenia and bipolar and useful in clinical practice for healthcare professionals.     

Development of the Anxiety Change Expectancy Scale (ACES) and validation in college, community, and clinical samples

This study investigated the psychometric properties of a newly developed 20-item instrument that assesses one's anticipation of being able to change anxiety: the Anxiety Change Expectancy Scale (ACES). Study 1 evaluated the ACES in undergraduate university students, self-identified as experiencing difficulties with anxiety. Study 2 examined the ACES in a community sample of persons with anxiety difficulties. Study 3 tested the utility of the ACES in predicting treatment change in a group of individuals with generalized anxiety disorder participating in group cognitive behavioral therapy for anxiety. Across these samples, the ACES demonstrated excellent internal reliability (coefficient alphas=.89–.92) as well as good convergent, divergent, and factorial validity. The ACES was also significantly predictive of treatment-related changes in somatic anxiety symptoms and worry. The results of these studies provide strong support for the ACES as a reliable and valid measure of expectancies for changing anxiety.     

Relationships between the Beck Depression Inventory and the Hamilton Psychiatric Rating Scale for Depression in depressed outpatients

The Beck Depression Inventory (BDI) and the Hamilton Psychiatric Rating Scale for Depression (HRSD) were used with 300 outpatients diagnosed with DSM-III major depression disorders. A principal-components analysis was performed on the intercorrelations among the 21 BDI and 24 HRSD symptoms. Three orthogonal components were found and interpreted as reflecting differences in self-report and clinical rating methods for measuring the severity of depression. The importance of using both self-reports and clinical ratings for evaluating depression in psychiatric outpatients was discussed.     

Strength-Based Assessment of Rural African American Early Adolescents: Characteristics of Students in High and Low Groups on the Behavioral and Emotional Rating Scale

Early adolescents strengths were examined in relation to factors that are associated with developmental risk or resilience in two rural low-income southern communities. The sample was comprised 279 students (101 boys, 178 girls), all of whom were African American and reflected the public school attendance of this community. Parent reports on the Behavioral and Emotional Rating Scale (BERS) were used to assess strengths. BERS scores were examined in relation to academic, behavioral, and social characteristics of participants. For girls, total strength scores on the BERS were positively associated with indices of high competence and negatively associated with problematic characteristics. For boys, high and low total strength scores differentiated between youth who did and did not have risks associated with externalizing behavior problems. The results are discussed in terms of their implications for assessment and prevention.