Personality factors in the Eysenck personality questionnaire

Hierarchical factor analyses were carried out on raw scored EPQ data yielded from two samples of subjects, a Gallup adult quota sample of 1198 subjects and 406 university undergraduates. Each sample was split by sex providing six data sets for analysis. Results at the second order level clearly indicated the recovery of practically all the E, N and L items as three distinct factors, P item recovery differed among males and females. Adult female and student female subject groups did not show clear recovery of a substantial majority of P items. Although P, as a factor, did not appear recognisably in the male student sample, this was interpreted as being due either to the low subject: variable ratio and/or to the low subject number (N=171) and its resultant lack of definition of initial P item variance. The P factor appeared most strongly as a second order in the total Gallup, total student, and male Gallup sample.     

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.     

The itemetric properties of the Eysenck personality questionnaire: A reply to Helmes

Helmes (1980) presented results demonstrating that the purported factors of the Eysenck Personality Questionnaire (EPQ) did not emerge in a sample of 191 undergraduates. However, this conclusion was reached using incorrect factor analytic methodology. Helmes not only used an idiosyncratic version of Eysenck's original methodology but also failed to take into account recent evidence on factor analytic procedures. To illustrate the remarkable clarity of the EPQ factors, the results from three samples of data are presented here. The sample data are diverse, taken from three different populations: 1198 British adults, 406 British students and 116 Thai students. The consistency of various psychometric parameters adds further evidence justifying the existence of these factors.     

Self-knowledge and social desirability of personality traits

Research into the self-concept has shown that self-knowledge is affected by factors such as trait desirability, trait vagueness, and self-variability. Among these, social desirability appears to play a prominent role. In a multidimensional view of the self, however, several studies indicate that in special conditions people show adequate self-knowledge in specific personality dimensions. The present study tests this with respect to extraversion and anxiety predisposition on a sample of 160 late adolescents. The main results confirm the prominent influence of social desirability, but they also provide support for the hypothesis of the specificity of self-perception. Despite a common pattern, the effects of desirability appeared, to some extent, to be less strong for anxiety than for extraversion. Several possible interpretations of this finding are discussed. © 1998 John Wiley & Sons, Ltd.     

Investigating the influence of social desirability on personality factor structure

This study provides a comprehensive investigation into whether social desirability alters the factor structure of personality measures. The study brought together 4 large data sets wherein different organizational samples responded to different personality measures. This facilitated conducting 4 separate yet parallel investigations. Within each data set, individuals identified through a social desirability scale as responding in an honest manner were grouped together, and individuals identified as responding in a highly socially desirable manner were grouped together. Using various analyses, the fit of higher order factor structure models was compared across the 2 groups. Results were the same for each data set. Social desirability had little influence on the higher order factor structures that characterized the relationships among the scales of the personality measures.     

A factor analysis of the Eysenck personality questionnaire and the Strelau temperament inventory

The relationship of the Eysenck Personality Questionnaire and the Strelau Temperament Inventory was examined. Correlation analyses of test scores and items provided little evidence of an identity between the scales of these tests.     

Relationships between the Eysenck personality questionnaire,Strelau temperament inventory and Freiburger beschwerdenliste gesamtform

A correlational and factor analysis was carried out on test scores for the Eysenck Personality Questionnaire, Strelau Temperament Inventory and Freiburger Beschwerdenliste Gesamtform. Results suggest a convergence between Eysenck's personality factors and Strelau's questionnaire-based measures of neo-Pavlovian nervous system properties, and provide further evidence of a correspondence between these measures and psychosomatic disease.     

Examining the relationship between the Eysenck personality inventory and the sixteen personality factors questionnaire using predictive configural frequency analysis

A nonparametric analogue of canonical correlation analysis, called P-CFA, was used to determine how the Eysenck Personality Inventory is related to Cattell's Sixteen Personality Factors Questionnaire. The P-CFA methods used showed that Eysenck's personality dimensions of Extraversion and Neuroticism can be predicted quite well from suitably chosen primary scales in the Cattell questionnaire. The results were consistent with those obtained in another study using canonical analysis. Beyond that, P-CFA methods were used to predict Eysenckian trait-type categories from Cattell's primary scales. The results were weak and not predictable from canonical analysis, but showed potential analytic capabilities of P-CFA that are not available in canonical analysis.     

Control of social desirability in personality inventories: Principal-factor deletion

Rational and statistical techniques for controlling social desirability (SD) in scales derived from self-report inventories are reviewed. The principal-factor deletion technique is explained in detail. It is applied during factor analysis when derived content scales are expected to be tainted with SD. If one principal factor is found to represent social desirability, the implicated factor is dropped and the communalities adjusted before the remaining factors are rotated to a desired simple structure criterion. Subscales derived from resulting factors are free of SD bias. Principal-factor deletion is compared with other approaches including rational techniques, covariate procedures, and target rotation.     

Influence of social desirability on age differences in self-reports of mood and personality

ABSTRACT Increased age has been found to be associated with differences in affect and personality that have been interpreted in terms of better emotional regulation and increased maturity. However, these findings have largely been based on self-report data, and the primary goal of the current research was to investigate the hypothesis that age-related differences in affect and in certain desirable personality traits might, at least partially, reflect age differences in social desirability. As expected, increased age was associated with lower levels of negative affect and Neuroticism and higher levels of positive affect, life satisfaction, Agreeableness, and Conscientiousness, and scores on the social desirability scale were positively related to age and to desirable self-report characteristics but negatively related to undesirable self-report characteristics. Importantly, controlling for the variance in the social desirability measure resulted in less positive age trends in both types of self-report measures.     

Differentiation of biogenic and psychogenic impotence with the Eysenck personality questionnaire and the inventory of sexual attitudes

Thirty-one men with erectile dysfunction completed the Eysenck Personality Questionnaire and the Inventory of Sexual Attitudes. Biomedical assessment was utilized to assign men to biogenic and psychogenic groups. The only significant difference noted between the two groups was a tendency of men with psychogenic impotence to be more introverted.     

The religiosity-psychoticism relationship and the two factors of social desirability: A response to Michael W. Eysenck (1999)

This paper is based upon an interpretative phenomenological analysis (IPA) which investigated the experiences of twelve people who had been sexually abused by Roman Catholic priests or religious. The premise of the research was based upon a perceived assumption that distinct forms of sexual traumatology generate unique trauma characteristics not accounted for within the existing Post-Traumatic Stress Disorder (PTSD) conceptual frameworks (International Statistical Classification of Diseases and Related Health Problems ((DSM-IVTR 2000;) ICD-10 R, 2007). Recent developments in psychodiagnostics to support the relevance of religious concerns where incorporated into the Diagnostic and Statistical Manual of Mental Disorders DSM-IV edition (1994) which allowed a range of “religious” and “spiritual” problems to be explicitly identified as a focus for specific clinical attention. However, these appear quite vague in accounting for the range of trauma experiences experienced by this participant group. Evidence arose which indicated the majority of the research participants considered “God” to have been integral within the abuse, manipulated by design or default by the cleric or religious perpetrator. These idiosyncratic trauma characteristic created significant anxiety and distress in areas such as theological belief, crisis of faith, and fears surrounding the participant's own mortality. The IPA research identified six distinct, themed differences of which four will be discussed in more detail for the purpose of this paper. It will consider the attributes of these themes in relation to Roman Catholicism, celibacy and Canon law, and further question the sufficiency of the DSM-IV “V” Codes in accounting for the myriad of symptoms survivors of sexual abuse perpetrated by Roman Catholic Priests and Religious actually describe.     

The control of social desirability in personality inventories: A study using the principal-factor deletion technique

The present study sought to investigate Paulhus' (1981) principal-factor deletion technique (PFDT), a factor analytic method for controlling for socially desirable responding. Adult subjects (N = 330) responded to both forms of the Eysenck Personality Inventory and a 32-item lie scale. Peer ratings of extraversion and neuroticism served as criterion measures. The factor deleted by PFDT more closely reflected neuroticism than impression management. Factors resulting from PFDT were considerably less valid and less content saturated than those emerging from an ordinary factor solution. The implications of these results are discussed from the perspectives of predictive and construct validity.     

The effect of social desirability on self reported and recorded road traffic accidents

The use of lie scales has a fairly long history in psychometrics, with the intention of identifying and correcting for socially desirable answers. This represents one type of common method variance (bias introduced when both predictors and predicted variables are gathered from the same source), which may lead to spurious associations in self-reports. Within traffic safety research, where self-report methods are used abundantly, it is uncommon to control for social desirability artifacts, or reporting associations between lie scales, crashes and driver behaviour scales. In the present study, it was shown that self-reports of traffic accidents were negatively associated with a lie scale for driving, while recorded ones were not, as could be expected if the scale was valid and a self-report bias existed. We conclude that whenever self-reported crashes are used as an outcome variable and predicted by other self-report measures, a lie scale should be included and used for correcting the associations. However, the only existing lie scale for traffic safety is not likely to catch all socially desirable responding, because traffic safety may not be desirable for all demographic groups. New lie scales should be developed specifically for driver behaviour questionnaires, to counter potential bias and artifactual results. Alternatively, the use of a single source of data should be discontinued.