A priori tests in repeated measures designs: Effects of nonsphericity

The validity conditions for univariate repeated measures designs are described. Attention is focused on the sphericity requirement. For av degree of freedom family of comparisons among the repeated measures, sphericity exists when all contrasts contained in thev dimensional space have equal variances. Under nonsphericity, upper and lower bounds on test size and power of a priori, repeated measures,F tests are derived. The effects of nonsphericity are illustrated by means of a set of charts. The charts reveal that small departures from sphericity (.97 <1.00) can seriously affect test size and power. It is recommended that separate rather than pooled error term procedures be routinely used to test a priori hypotheses.Appreciation is extended to Milton Parnes for his insightful assistance.     

Testing the identity of trends under the restriction of monotonicity in repeated measures designs

Procedures are described for the analysis of profiles of means in repeated measures designs under order restriction for patterns of mean change. The exact likelihood ratio is derived for the case of two groups of subjects, and a computationally simple alternative to the exact likelihood ratio test is provided for designs involving more than two groups. Tables of critical values are provided for the case of simple-order alternatives.The author wishes to thank Joseph C. Saunders for his editorial assistance.     

Psychometric characteristics of a multidimensional measure to assess impairment: The Child and Adolescent Functional Assessment Scale

The Child and Adolescent Functional Assessment Scale (CAFAS) is a multidimensional measure of degree of impairment in functioning. Interrater reliability data are presented for lay raters, graduate students, and frontline staff. Reliability was high for the total score and behaviorally-oriented scales. Construct, concurrent, and discriminant validity were assessed with the sample of children and adolescents evaluated at the Fort Bragg Demonstration Evaluation Project. Youth and their caregivers were evaluated via interview and selfcompleted instruments at four time points. Significant correlations were found between the CAFAS and other related constructs. Concurrent validity was demonstrated by logistic regression analyses examining the relationship between CAFAS ratings and problematic behaviors endorsed on measures completed by parents, teachers, or the youth. Youth with higher CAFAS total scores were much more likely to have poor social relationships, difficulties in school, and problems with the law. Discriminant validity was assessed with a repeated measures analysis of variance with intensity of care at intake and time as factors. Youth who were inpatients or in residential treatment centers at intake had higher CAFAS scores than those who were outpatients. These findings provide strong evidence for the reliability and validity of the CAFAS.     

USE OF SOCIAL-SKILLS TRAINING IN THE TREATMENT OF EXTREME ANXIETY AND DEFICIENT VERBAL SKILLS IN THE JOB-INTERVIEW SETTING

A 30-year-old recent college graduate, exhibiting extreme anxiety and deficient verbal skills in job interviews, was treated with a social-skills training procedure that included instructions, modelling, behavior rehearsal, and videotape feedback. Three target behaviors—focused responses, overt coping statements, and subject-generated questions—were presented using a multiple-baseline design. Galvanic skin-response activity was monitored during pre- and posttraining in vivo job interviews. In addition, independent judges unobstrusively rated the subject's social-communicative behaviors in his temporary work-setting before and after training. Training resulted in expected changes for all three target behaviors and a decrease in the rate of speech disturbances. Physiological data supported the subject's report that training enabled him to deal with his anxiety more effectively during job interviews. Training was found to generalize to novel interview questions and different interviewers. Furthermore, unobtrusive measures of eye contact, fluency of speech, appropriateness of verbal content, and composure supported the subject's report that training generalized to his daily social interactions on the job.     

Implicit and explicit attitudes in transportation research: A literature review

Dual-Process Models of Attitudes (DPMA) have provided new concepts and methods for attitude-behavior research in the field of transportation. Notwithstanding, there is a lack of critical reviews on this topic; leaving researchers with an unclear picture of the key issues to consider in developing new research. This paper reviews previous studies on DPMA in traffic and transportation research. A systematic review of English and non-English language articles using Transport Research International Documentation (TRID) as main database was conducted. Additional studies were identified by searching in ScienceDirect and Google Scholar. A total of 1674 references were revised. Twenty-eight articles met the inclusion criteria. Four central issues were examined: (a) the role of implicit and explicit attitudes in transport behavior, (b) the degree of relationship between implicit and explicit attitudes, (c) the types of measures used to assess implicit attitudes, and (d) the malleability of implicit attitudes. The review has identified that: (a) implicit attitudes were associated with a wide variety of transport-related behavior, (b) implicit and explicit attitudes were weakly correlated (mean correlation, weighted by sample size was r = 0.11), and little knowledge exists on factors moderating the implicit-explicit relationship, (c) the evidence on the indirect measures’ better resistance to social desirability bias as compared with traditional techniques is scant and inconclusive, (d) some studies exhibit problems in the application of indirect measures, and (e) few studies (n = 2) aimed to evaluate interventions for attitude change. The analysis showed the sustained growth of the applications, the potential of DPMA, and the need for more rigorous research. Most studies of area do not consider the theoretical and methodological shortcomings of the DPMA, and tend to be based on a controversial notion of implicit and explicit attitudes.     

Multitrait Multimethod validation of Implicit Association Test as a measure of individual differences in personality: Is there personality at all?

The objective of the study was to investigate the validity of IAT in the assessment of the Big five personality traits. We employed the Multi-Trait Multi-Method (MTMM) approach on a sample of 146 respondents. We collected measures on IATs assessing Big five personality traits, self-reports, and two ratings of close others of different gender on NEO PI-R. Additionally, we assessed behavior related to the Big five personality traits in a structured interview where three experts independently provided rating measures. MTMM analyses suggest that personality IAT measures have little in common with personality traits measured traditionally using explicit methods. The evidence does not support the claim that personality IAT can serve as a valid measure of individual differences in personality traits.     

Judging the Probability of Hypotheses Versus the Impact of Evidence: Which Form of Inductive Inference Is More Accurate and Time‐Consistent?

Inductive reasoning requires exploiting links between evidence and hypotheses. This can be done focusing either on the posterior probability of the hypothesis when updated on the new evidence or on the impact of the new evidence on the credibility of the hypothesis. But are these two cognitive representations equally reliable? This study investigates this question by comparing probability and impact judgments on the same experimental materials. The results indicate that impact judgments are more consistent in time and more accurate than probability judgments. Impact judgments also predict the direction of errors in probability judgments. These findings suggest that human inductive reasoning relies more on estimating evidential impact than on posterior probability.     

Testing 1, 2, 3, …4? The personality of repeat SAT test takers and their testing outcomes

The current study considered the correlates of test retaking. In particular, the personality trait of neuroticism was proposed to be related to retaking the SAT test. Results revealed that, accounting for initial SAT score and the other Big Five factors of personality, neuroticism predicted the number of times an individual took the SAT before attending college. Further, the results of a latent growth model indicated that, for those who retook the SAT, test scores showed improvement over time. None of the Big Five predicted changes in SAT scores. Results are discussed in light of the possible benefits of high levels of neuroticism for SAT score improvement.     

On the predictive validity of indirect attitude measures: Prediction of consumer choice behavior on the basis of affective priming in the picture-picture naming task

Recent studies have revealed that robust and replicable affective priming of naming responses can be obtained when pictures are used as primes and targets. The aim of the present research was to examine the predictive validity of affective priming effects that are obtained with the picture-picture naming task. In two studies that were modeled after [Karpinski, A., & Hilton, J. L. (2001). Attitudes and the Implicit Association Test. Journal of Personality and Social Psychology, 81, 774-778], we observed that individual difference scores that are obtained with the naming task exhibit good predictive validity. Both practical and theoretical implications of this finding are discussed.