Factor structure of the private self-consciousness scale: role of item wording

In 3 studies, I have tested the structure of different phrasing versions of the Private Self-Consciousness Scale (PrSC; Fenigstein, Scheier, & Buss, 1975) using exploratory and confirmatory factor-analytic methods and examined their predictive validity. For the original version of the PrSC, a 2-factorial model similar to Nystedt and Ljungberg's (2002) solution was found to best fit the data. When all scale items included extreme rate of occurrence words such as always, a single-factor solution emerged. Finally, when all words reflecting rate of occurrence were removed, again a 2-factor structure emerged, although different in item composition from that of the original version. In addition, different patterns of association emerged between the PrSC factors and depression and self-esteem for the extreme and neutral versions. I discuss the importance of reconceptualizing self-consciousness and the need for a new, theoretically based scale for self-consciousness.     

A role theoretical interpretation of personality scale item responses

This paper proposes that test-taking behavior can be regarded as a kind of self-presentation formally identical to that which goes on in most social interaction. It follows from this analysis that the success of such self-presentations should be affected by the actor's role-taking ability or empathy. Evidence is presented that supports this conjecture; the paper then suggests that role-taking ability may limit in a systematic manner validity coefficients in much assessment research.     

Rasch analysis and item reduction of the hypomanic personality scale

The aim of the current study was to reduce the number of items in the 48-item hypomanic personality scale (HPS) and determine whether a unidimensional scale of the hypomanic trait could be derived. Previously collected HPS data from University students (n = 318) were applied to the Rasch model (one-parameter item response theory). Overall scale and individual item fit statistics were used to judge fit to the model and item maps employed to determine coverage of the trait. Cronbach’s Alpha and correlations with other questionnaires pre- and post-item reduction were evaluated. Rasch analysis indicated that the original HPS was not unidimensional, had significant redundancy and differential item functioning by age and gender. An iterative process of item reduction produced a 20-item HPS (HPS-20) that retained the concepts of the original HPS and had excellent fit to the Rasch model (χ² p = 0.27). Unidimensionality of the HPS-20 was confirmed. The traditional psychometric properties of the HPS-20 and coverage of the underlying hypomanic construct were similar to the original. It was possible to derive a unidimensional measure of the hypomanic trait. Further use of the HPS-20 is encouraged as it may increase understanding of the risk factors for affective disorders.     

Note on computation of bi-serial correlations in item evaluation

By the use of an algebraic variant of the ordinary formula for bi-serial correlation, tables, and graphic devices, a time-saving systematic procedure for the computation of bi-serial correlation co-efficients is outlined for application to the evaluation of items of a test. A table of z for arguments ofp=.000 top=.999 is given.     

Hardy personality as moderator variable of burnout syndrome in firefighters

In last years, theorists and researchers have pointed to the relevance of personal factors in resilience and vulnerability on burnout. The purpose of this study was to examine the role of hardy personality as moderator of the relationship between job stressors and burnout. A total of 405 firefighters of the Community of Madrid participated in the study. The results of the hierarchical multiple regression analysis showed that the challenge component of hardy personality buffer the influence of job stressors on the occurrence of burnout. Results support the hypothesis that hardy personality may have moderator effects on burnout. Furthermore, commitment appeared as a mediator of the relationships between burnout and its associated symptomatology. Finally, discussion emphasized the need to focus on the interaction between personal and contextual factors in order to make advances in understanding the burnout process.     

Item–trait association, scale multidimensionality, and differential item functioning identification in personality assessment

This report documents relationships between differential item functioning (DIF) identification and: (1) item–trait association, and (2) scale multidimensionality in personality assessment. Applying [Zumbo, B. D. (1999). A handbook on the theory and methods of differential item functioning (DIF): Logistic regression modeling as a unitary framework for binary and Likert-type (ordinal) item scores. Ottawa, ON: Directorate of Human Resources Research and Evaluation, Department of National Defense.] logistic regression model, DIF effect size is found to become increasingly inflated as investigated item associations with trait scores decrease. Similar patterns were noted for the influence of scale multidimensionality on DIF identification. Individuals who investigate DIF in personality assessment applications are provided with estimates regarding the impact of the magnitude of item and trait association and scale multidimensionality on DIF occurrence and effect size. The results emphasize the importance of excluding investigated items in focal trait identification prior to conducting DIF analyses and reporting item and scale psychometric properties in DIF reports.     

Note on the computation of biserial correlations in item analysis

A rapid method is described for machine computation of biserial correlations in item analysis with several criteria. This method has been found to yield biserial correlations from punched IBM cards at the rate of about 41 per hour.     

Heritability of item responses on the Eysenck personality questionnaire

We report estimates of the heritabilities and common environment variances for the 90 items of the Eysenck Personality Questionnaire. Responses from 627 pairs of twins were analysed using the biometrical genetic analysis based on the threshold model described by Falconer. Many of the items revealed very substantial heritabilities. No less than 67/90 had heritabilities > 33%, 19 had > 50% and a few were even > 65%. Some of the useful implications of item heritabilities are discussed.     

Use of item ratings to examine personality test item cognitive response processes

This research examines the processes respondents use to answer personality test items. A total of 158 true/false items from four scales of the Personality Research Form and the California Psychological Inventory were used as stimuli. University students (N = 120) responded to each item and indicated one of nine strategies used in deciding on a response. Obtained response strategy ratings for items were reliable and their frequencies corresponded closely to previous findings with other items. Subsequently, the associations between item response strategy frequencies and item-total correlations were computed. Congruent with previous research, better items avoided behaviours or experiences and evoked responding based on traits and on referring to the statements of others. The associations between item response strategies and other indices of item quality are discussed and implications regarding scale development are offered.     

Time perception, impulsivity, emotionality, and personality in self-harming borderline personality disorder patients

To investigate how time perception may contribute to the symptoms of self-harming Borderline Personality Disorder (BPD) patients, 19 self-harming BPD inpatients and 39 normal controls were given measures of time perception, impulsivity, personality, emotion, and BPD characteristics. A test sensitive to orbitofrontal cortex (OFC) function ("Frontal" Behavior Questionnaire) was also administered, as the OFC has been associated with impulsivity and time perception. BPD patients produced less time than controls, and this correlated with impulsiveness and other characteristics commonly associated with BPD. BPD patients were also less conscientious, extraverted, and open to experience, as well as more impulsive (self-report and behaviorally), emotional, neurotic, and reported more BPD characteristics, compared to controls. The results suggest that some of these core characteristics of BPD may be on a continuum with the normal population and, impulsivity in particular, may be related to time perception deficits (i.e., a faster subjective sense of time). Finally, BPD patients scored higher on the Frontal Behavior Questionnaire, suggesting that some symptoms of the BPD syndrome may be related to problems associated with the OFC. A control spatial working memory task (SWM) revealed that SWM deficits could not explain any of the BPD patients' poor performance. While impulsivity was correlated with time perception across all participants, emotionality, introversion, and lack of openness to experience were not. This suggests that different symptoms of the borderline personality syndrome may be separable, and therefore, related to different cognitive deficits, and potentially to different brain systems. This may have important implications for treatment strategies for BPD.     

Item grouping and item randomization in personality measurement

This paper describes a study examining the impact of item order in personality measurement on reliability, measurement equivalence and scale-level correlations. A large sample of university students completed one of three forms of the International Personality Item Pool version of the Big Five personality inventory: items sorted at random, items sorted by factor, and items cycled through factors. Results showed that the underlying measurement model and the internal consistency of the IPIP-Big Five scale was unaffected by differences in item order. Also, most of the scale-level correlations among factors were not significantly different across forms. Implications for the administration of tests and interpretation of test scores are discussed, and future research directions are offered.     

Note on use of extreme criterion groups in item discrimination analysis

The purpose of this note is to reconsider the Kelley-Cureton definition of optimal extreme groups for estimating item-criterion correlations. Optimal tail per cents are derived, using the criterion of minimum sampling variance of the tetrachoric correlation coefficient, and the findings are related to earlier work of Mosteller. It is shown that upper and lower 27 per cent groups yield the most precise estimate of the tetrachoric coefficient only when the population correlation is close to zero. When the population value is .4, extreme 20 per cent groups provide estimates with the smallest sampling error variance. It is further shown, however, that 27 per cent extremes yield highly efficient estimates. Thus no change is recommended in traditional item analysis procedures.