Extraversion,neuroticism, and psychoticism in Iranian students1

A Persian translation of Eysenck's extraversion, neuroticism, and psychoticism inventory (PEN) was given to 209 university and 101 high school students in Iran. Comparisons of the mean scores on extraversion, neuroticism, and psychoticism between the two age groups do not show any significant differences, although the high school students appear to score higher than university students on all three personality dimensions. Comparisons of reliability estimates determined separately for the two age groups suggest that the PEN is equally reliable for high school and university students. The results are discussed in their cross-cultural context.     

Probing Canadian Prejudices: A Preliminary Objective Survey

Personality correlates of S s indicating suicidal intent have been found to be different from those of normals in a direction indicative of possible psychopathology. To test the cross-cultural relevance of this hypothesis, three samples of male and female students were administered Eysenck's extraversion, neuroticism, and psychoticism inventory: 209 Iranian and 128 Turkish university students and 101 Iranian high school students. S s were classified into “suicidal” and “normal” groups in each sample by means of a self-rating scale of suicideintent. Comparison of scores showed that irrespective of nationality and age, suicidals scored higher on neuroticism and psychoticism but lower on extraversion than their normal counterparts. Results suggest that personality correlates of suicidal tendency are rather similar despite differences in age and cultural background.     

Personality,prayer and church attendance among a sample of 11 to 18 year olds in Norway

A series of recent studies has employed various measures of Eysenck's dimensional model of personality alongside questions of frequency of personal prayer and church attendance. The consensus from these studies suggests it is psychoticism, rather than extraversion or neuroticism that is fundamental to a greater frequency of personal prayer and church attendance. The present study tested the generalizability of these findings by examining the association between measure of personal prayer and church attendance and the Revised Eysenck Personality Questionnaire among a sample of 479 11- to 18-year-old Norwegian school children. For the total sample a significant association was found between a greater frequency of both personal prayer and church attendance and lower psychoticism scores. These findings are consistent with previous research and with Eysenck's theory regarding individual differences in social attitudes.     

Neuroticism and extraversion as predictors of negative and positive emotional information processing: comparing Eysenck's,Gray's,and Newman's theories

This study compared how extraversion, neuroticism, and extraversion × neuroticism are related to processing of pleasant and unpleasant emotional information as predicted by Eysenck's, Gray's, and Newman's theories. Initially, the participants' levels of extraversion (as measured by the sociability subscale) and neuroticism were assessed with Eysenck's Personality Inventory. They were then tested individually. After completing a questionnaire of current positive and negative moods, they completed three tasks measuring processing of pleasant, unpleasant, and also neutral information. The results showed that extraversion was associated positively with the processing of pleasant information, while neuroticism was associated positively with the processing of unpleasant information. These findings support predictions from Eysenck's theory. Copyright © 2002 John Wiley & Sons, Ltd.     

Three superfactors in the 16PF and their relation to Eysenck's P,E and N

The initial data consisted of responses to the 16PF and E.P.Q., obtained at the same testing, from 239 Independent Study Students. The responses to the 16PF were subjected to a principal components analysis. A Scree Test applied to the original solution indicated that between 8 and 10 factors should be retained for rotation. As this was at variance with Cattell's postulated factor structure supplementary analyses involving the retention and rotation of from 16 to 22 factors and item-factor analyses of groups of scales were carried out. All of these analyses failed to reproduce anything like a clear 16-scale structure. In order to accommodate the hypothesis that a 3-factor solution, in line with Eysenck's postulated dimensions of P, E and N, underpinned the Cattell scales and to test the validity of the intermediate solutions, 8, 7, 6, 5, 4 and 3 factors were retained and subjected to varimax and promax rotations. These solutions were compared with solutions obtained from analyses of the responses to the 16PF of 200 students at the Independent Assessment and Research Centre. Only the 3-factor solutions showed a degree of replicability across samples. The samples were combined to form a total sample of 439 cases and this was tested for factor replicability using factor comparability coefficients based on factor scores. This revealed a clear 3-factor structure, of anxiety, superego and exvia, which was replicable across sexes. An analysis of the responses to the combined questionnaires indicated that the neuroticism and anxiety factors and the extraversion and exvia factors were co-incident, but that psychoticism and superego were separate factors. However, the P-scale loaded -0.40 on the superego factor, which lends some support to Eysenck's contention that psychoticism is the obverse of superego. A 3-step analysis, in which pairs and triads of scales were tested for factor replicability, confirmed the equivalence of the neuroticism and anxiety factors and the extraversion and exvia factors. As far as psychoticism and superego were concerned only the latter appeared as a real, replicable factor. This factor contained virtually all the 16PF superego or S-items and 11 of the 25 E.P.Q. P-items. The 14 P-items which did not load significantly on the superego factor were those involving the cruelty or sadism element of the concept of psychoticism. It is contended that superego, rather than psychoticism, may best lay claim to join neuroticism and extraversion in what may be termed the great triumverate of the personality sphere.     

Behavioral Correlates of Selected MMPI–2 Clinical,Content, and Restructured Clinical Scales

An examination of the internal structure of the Tennessee Self-Concept Scale (TSCS) and the interrelationship among the TSCS scales and the secondary dimensions of the Sixteen Personality Factor Questionnaire (16PF) supported three conclusions: (a)The primary dimension underlying the TSCS is positive self-evaluation, freedom from neurotic symptoms, or the absence of anxiety, (b) this central dimension of the TSCS aligns with the 16PF secondary Anxiety vs. Adjustment, and is virtually independent of the other dimensions of the normal personality sphere, and (c) the mutual orthogonality of extraversion, anxiety or neuroticism, and an empirically derived psychoticism scale provided some support for Eysenck's PEN theory of personality organization.     

On the relationship between personality and time estimation

The influence of basic dimensions of personality, such as extraversion, neuroticism, and psychoticism, on estimation of time still appears to be unclear. Therefore, in the present study the relationship between Eysenck's basic dimensions of personality and time estimation was investigated in 34 male Ss. After filling in the short version of a German adaptation of the Eysenck Personality Questionnaire-Revised, Ss were required to reproduce target durations ranging from 5 to 40 sec. As a measure of performance, reproduction ratio scores, representing directional errors, and absolute error scores were computed. Correlational analyses revealed no indication of a linear relationship between neuroticism and time estimation. However, there was a tendency for extraverts to overestimate time and to make less accurate time judgments relative to introverts. Furthermore, Ss with higher psychoticism scores were less prone to overestimation of time intervals and showed better accuracy of temporal reproductions than Ss with lower psychoticism scores.     

Heymans' temperamental dimensions recomputed

In this paper we report our recomputations of the data of Heymans' ‘heredity-inquiry’, which he carried out at the beginning of this century to test his dimensions of temperament (activity, emotionality, secondary functioning). In our study of 2309 subjects, we globally replicated the three factors. In the activity as well as in the emotionality factor two subclusters could be distinguished. The secondary-functioning factor turned out to resemble the present-day impulsivity-reflection dimension. In the final section the Heymans factors are compared with Eysenck's extraversion, neuroticism and psychoticism dimensions.     

Extraversion,neuroticism, psychoticism and self-reported delinquency: Evidence from eight separate samples

Eight separate samples of high school and university students (Total N = 410) in Britain and Canada were used to test predictions from Eysenck's theory that delinquents should be high scorers on scales of extraversion, neuroticism, and psychoticism. Self-report paper- and pencil-questionnaire measures of both personality and delinquency were administered under conditions that ensured anonymity. The evidence showed clear support for a relationship between high delinquency scores and high scores on both extraversion and psychoticism. These relationships held up across diverse samples and different ways of analyzing the data. No support was found for a relationship between delinquency scores and the dimension of neuroticism.     

Multidimensional arousal states,diurnal rhythms,cognitive and social processes,and extraversion

Based on Thayer's two-dimensional arousal model, several questions were investigated, including the relationship between endogenous diurnal rhythms of energetic arousal and various psychological functions. Also investigated were theoretical issues relating to Eysenck's arousal theory of extraversion and neuroticism, and associations involving the Morningness-Eveningness Questionnaire (MEQ). Self-reported arousal measurements were taken from 18 participants every hour of the waking day for 6 separate days. Substantial relationships were observed between obtained diurnal cycles of energetic arousal and previous interview estimates by the same individuals of best and worst times for social, mood, and intellectual functions. Eysenck's Neuroticism scores were found to predict overall tension ratings, and tense arousal showed an interaction between Extraversion and time of day similar to Blake's body temperature findings. Moderate support was also found for the validity of the MEQ. Discussed were various possible modifications of Eysenck's arousal theory based on Thayer's two-dimensional model.     

Extraversion and neuroticism: Investigation of resting electrodermal activity

In 1967 Eysenck published his biological account of extraversion and neuroticism. In the same year Claridge identified several problems with this theory. More recently Robinson has detailed a promising modification to Eysenck's theory which addresses many of the issues raised by Claridge. Drawing on Robinson's theory it was hypothesised that differences in resting electrodermal activity (EDA) would contrast extraverted‐neurotics (low arousal) and introverted‐neurotics (high arousal). The Eysenck Personality Questionnaire (EPQ) was used to identify four extreme groups of female participants: extraverted‐stable (n = 16), extraverted‐neurotic (n = 15), introverted‐stable (n = 8) and introverted‐neurotic (n = 16). EDA measures of skin conductance level (SCL) and non‐specific skin conductance response (NS‐SCR) were collected during two rest periods. Planned contrasts between the extraverted‐neurotic and introverted‐neurotic groups provided support for Robinson's theory on SCL but not NS‐SCR. It was argued that the results for NS‐SCR frequency could be accommodated by Robinson's theory if NS‐SCR was conceptualised as a measure of cortical reactivity to unspecified stimuli rather than as a measure of tonic arousal.     

Social dissimulation,perceived competence and personality

The Junior Eysenck Personality Questionnaire (JEPQ) (Eysenck and Eysenck, 1975) was completed by 129 boys (mean age 10 yr 10 months: SD = 4 months) and 119 girls (mean age 10 yr 11 months; SD = 3 months) from Belfast. Belfast boys' and girls' scores were significantly (P < 0.001) higher than the English standardisation data on psychoticism and extraversion, but their mean scores for neuroticism and the lie scale were remarkably similar. Belfast boys display significantly different intercorrelations in comparison with (i) the standardisation data—neuroticism/psychoticism (P < 0.01) and lie scale/neuroticism (P < 0.05)—and (ii) Belfast girls—neuroticism/psychoticism (P < 0.05). Psychoticism appears to play a highly salient role in Belfast boys' self-construals. Most of these pupils (n = 189) also completed the Perceived Competence Scale for Children (PCSC) (Harter, 1982). The PCSC minimises social dissimulation: the highest positive correlation with the lie scale being (r = 0.1). Correlations with the domains of the PCSC display the saliency of extraversion for girls' self-perceived physical competence and general competence, and for boys' self-perceived social competence, and the saliency of neuroticism for girls' self-perceived social competence.     

Transactional development of parent personality and child temperament

Stability and change in parental extraversion and neuroticism were studied in transaction with their views of their child's temperament from the age of six months to the age of five‐and‐a‐half years in 109 mother–father–child triads (parent–daughter: n = 61, parent–son: n = 48). While parental traits showed high stability, infants' higher positive affectivity predicted an increase in parental extraversion over 5 years, and infant's higher activity predicted a decrease in parental neuroticism. Parent‐rated temperament showed expected heterotypic continuity. Initially higher parental extraversion predicted an increase in the child's effortful control, and higher parental neuroticism predicted an increase in the child's negative affectivity. The results indicate that parental personality and child temperament develop in transaction promoting change in each other. Copyright © 2008 John Wiley & Sons, Ltd.     

Lifeguards and Physically Risky Prosocial Groups: A comparison based on personality theory

The goal of this study is to explore the personality of experienced professional lifeguards in terms of Eysenck and Eysenck's PEN model of personality and Zuckerman's sensation seeking trait. A sample of 144 male professional lifeguards were contrasted with three different samples: (1) a general population sample; (2) a sample of individuals engaged in physically risky sports; and (3) a sample of prosocial physically risky professionals. It was found that lifeguards resembled most closely the prosocials followed by the sportsmen and finally the general population. The most frequent and largest differences between lifeguards and the comparison groups were found on extraversion, experience seeking, and neuroticism. The implications for lifeguard selection procedures and future research are discussed.     

The relationship between Eysenck's personality dimensions and Bem's masculinity and femininity scales revisited

A sample of 86 male and 93 female students in Wales completed the short form Revised Eysenck Personality Questionnaire together with the Bem Sex Role Inventory. The data indicate that high scores on the scale of masculinity are associated with high extraversion and low neuroticism, but unrelated to either psychoticism or the lie scale, while high scores on the scale of femininity are associated with low psychoticism, high neuroticism and high lie scale scores, but unrelated to extraversion.     

Comparison of EPI and psychoticism scales with measures of the five-factor model of personality

The need for a comprehensive model of personality traits acceptable to the entire community of personality researches has often been acknowledged. In this article, two such models are compared. Eysenck scales measuring neuroticism, extraversion, psychoticism and lie are correlated with self-report and peer-rating measures of the five-factor model—neuroticism, extraversion, openness to experience, agreeableness and conscientiousness—in a sample of adult men and women. Findings suggest that: (1) neuroticism and extraversion factors from the two systems match well; (2) sociability and impulsivity are distinguishable traits, but both fall within the broad domain of extraversion; (3) the EPI L scale measures aspects of several substantive traits rather than a response bias; (4) openness to experience is not well-represented in the Eysenck system; and (5) psychoticism corresponds most closely to the low poles of agreeableness and conscientiousness.     

Psychoticism scores in graphic design students

Of a group of graphic design students, males were found to have higher psychoticism and neuroticism scores than normal on the Eysenck Personality Questionnaire. Extraversion and lie scores were not significantly different from normal. Females did not differ significantly from the normative data on psychoticism, extraversion, neuroticism or lie scores. A further group of new 1st year students showed raised psychoticism scores for females but not for males. The meaning of psychoticism in relation to the personality of artists is questioned by way of two paradoxes.     

Personality and the psychology of religion

Abstract

Three major personality dimensions were identified: extroversion, neuroticism and psychoticism. According to the theorizing, extraversion and psychoticism were predicted to be negatively related to religiosity, whereas neuroticism was positively related. The evidence has generally failed to support the predictions with respect to extraversion and neuroticism. However, low psychoticism is consistently related to religiosity, and this relationship is stronger with respect to the personal rather than public orientation to religion. Most of the available evidence is correlational in nature, so it is very difficult to explain this relationship. Future research should be broadened to include longitudinal studies and mood manipulations in order to clarify the processes underlying the potentially important links between psychoticism and religiosity.     

A new approach to Eysenck's theory of criminality

Studies examining Eysenck's theory of criminality by contrasting delinquent and non-delinquent groups have produced equivocal results. Some studies have shown criminals to score higher, as the theory predicts, on psychoticism, neuroticism and extraversion, whilst other studies have not. The current study examines the theory from a new approach by using cluster analysis to demonstrate the heterogeneity of personality types in delinquent sample (N =100) and in a comparison group (N = 100).Four personality types were found in each group. Two personality types which were present in the delinquent sample were not found in the comparison group. The first type consisted of individuals scoring high on neuroticism and extraversion whilst the second type consisted of individuals scoring high on psychoticism, neuroticism and extraversion. These types appeared to be consistent with Eysenck's theory of criminality.     

Agreeableness,conscientiousness, and psychoticism: Distinctive influences of three personality dimensions in adolescence

Researchers have suggested that the psychoticism (P) personality dimension of the Eysenck Personality Questionnaire may be largely redundant with the agreeableness (A) and conscientiousness (C) constructs of the five‐factor model. Little research has examined the distinctiveness of these constructs. We utilized a multi‐wave, multi‐method design to examine the ability of C, A, and P to uniquely predict a number of important outcomes amongst high school students. A total of 778 students (391 males, 387 females; mean age 15.41 years.) completed personality measures in Grade 10. Self‐reported self‐esteem, social support, health‐related behaviours, religious values as well as teachers' assessments of students, were collected 1 and 2 years later. A, C, and P were distinctive in their ability to predict these outcomes, after controlling for gender and socio‐economic status as well as Grade 10 extraversion, openness, and neuroticism. The individual P items explained unique variance over and above that explained by A and C. It was concluded that P is not merely the opposite of A and C. Implications for interventions are raised.