In search of psychoticism: Some conclusions revised

Two reports of a substantial relationship between Psychoticism, as measured by the E.P.Q. P-scale, and the trait of Impulsiveness prompted a reanalysis of data, part of which had already formed the basis for the conclusion that individual differences in measured Psychoticism could best be accounted for in terms of the trait of Conformity. The inclusion of Impulsiveness as a variable in the reference set leads to the conclusion that most of the variance of Psychoticism can indeed be accounted for in terms of Impulsiveness, although Conformity still makes a non-trivial contribution.     

Capturing the DSM‐5 Alternative Personality Disorder Model Traits in the Five‐Factor Model's Nomological Net

Several studies have shown structural and statistical similarities between the Diagnostic and Statistical Manual of Mental Disorders (5th ed.; DSM‐5) alternative personality disorder model and the Five‐Factor Model (FFM). However, no study to date has evaluated the nomological network similarities between the two models. The relations of the Revised NEO Personality Inventory (NEO PI‐R) and the Personality Inventory for DSM‐5 (PID‐5) with relevant criterion variables were examined in a sample of 336 undergraduate students (M_age = 19.4; 59.8% female). The resulting profiles for each instrument were statistically compared for similarity. Four of the five domains of the two models have highly similar nomological networks, with the exception being FFM Openness to Experience and PID‐5 Psychoticism. Further probing of that pair suggested that the NEO PI‐R domain scores obscured meaningful similarity between PID‐5 Psychoticism and specific aspects and lower‐order facets of Openness. The results support the notion that the DSM‐5 alternative personality disorder model trait domains represent variants of the FFM domains. Similarities of Openness and Psychoticism domains were supported when the lower‐order aspects and facets of Openness domain were considered. The findings support the view that the DSM‐5 trait model represents an instantiation of the FFM.     

Do extraverts ‚like to laugh’︁?: An analysis of the Situational Humor Response Questionnaire (SHRQ)

This study was an attempt to determine whether the degree of laughing in a variety of situations is related to Extraversion. In order to measure smiling and laughing, the Situational Humor Response Questionnaire (SHRQ) (Martin and Lefcourt, 1984) was given to 165 German university students and non-students and to 118 American university students. Extraversion and also Psychoticism, Neuroticism, and Social Desirability were measured by the revised Eysenck Personality Questionnaire (EPQ-R; Eysenck, Eysenck and Barrett, 1985). SHRQ scores correlated 0.52 and 0.36 with Extraversion, 0.26 and 0.26 with Psychoticism, and negligibly with Neuroticism in the German and American samples, respectively. The positive correlations between Extraversion and laughing propensity were interpreted as confirming the hypothesis that the ?tendency to laugh’? is a characteristic of extraverts. This tendency generalizes across situations and is not just limited to humorous ones. The SHRQ items correlating significantly with Psychoticism were interpreted as reflecting different evaluations of these particular situations by high and low P scorers rather than as determining a general tendency to laugh.     

Psychoticism and creativity

Eysenck and Eysenck (1976) cited a number of studies showing that creativity and originality are associated with high scores on their Psychoticism factor, P. In this study, we examined the generality of this claim by using a different set of creativity measures, scales from the Comprehensive Ability Battery (Hakstian & Cattell, 1976) and the Eysenck Personality Questionnaire (Eysenck & Eysenck, 1975), with a sample of 173 students. No appreciable overlap was found between the creativity scales and P. A number of possible explanations for this result are discussed, and we concluded that this finding may cast doubt on the generality of the link between creativity and P.     

The Eysenckian personality factors and their correlations with academic performance

Background. The relationship between personality and academic performance has long been explored, and a recent meta‐analysis established that measures of the five‐factor model (FFM) dimension of Conscientiousness have similar validity to intelligence measures. Although currently dominant, the FFM is only one of the currently accepted models of personality, and has limited theoretical support. In contrast, the Eysenckian personality model was developed to assess a specific theoretical model and is still commonly used in educational settings and research. Aims. This meta‐analysis assessed the validity of the Eysenckian personality measures for predicting academic performance. Sample. Statistics were obtained for correlations with Psychoticism, Extraversion, and Neuroticism (20–23 samples; N from 8,013 to 9,191), with smaller aggregates for the Lie scale (7 samples; N= 3,910). Methods. The Hunter–Schmidt random effects method was used to estimate population correlations between the Eysenckian personality measures and academic performance. Moderating effects were tested using weighted least squares regression. Results. Significant but modest validities were reported for each scale. Neuroticism and Extraversion had relationships with academic performance that were consistent with previous findings, while Psychoticism appears to be linked to academic performance because of its association with FFM Conscientiousness. Age and educational level moderated correlations with Neuroticism and Extraversion, and gender had no moderating effect. Correlations varied significantly based on the measurement instrument used. Conclusions. The Eysenckian scales do not add to the prediction of academic performance beyond that provided by FFM scales. Several measurement problems afflict the Eysenckian scales, including low to poor internal reliability and complex factor structures. In particular, the measurement and validity problems of Psychoticism mean its continued use in academic settings is unjustified.     

Relationships between psychoticism and a number of personality measures: a comparison between the original and revised versions of the Psychoticism scale

A correlational study was carried out using a sample of 123 secondary school students in order to assess the differences between the original and the revised version of the Psychoticism scale, regarding their relationships to a number of personality variables. Extraversion, Neuroticism, Social Desirability, Sensation Seeking, Schizotypal Personality, Borderline Personality, Susceptibility to Punishment and Impulsiveness scales were administered along with the items from the two Psychoticism scales. Both scales showed similar patterns of relationships, indicating that the revised Psychoticism scale, which has been found to improve the psychometric properties of the original Psychoticism scale, does not differ greatly from its predecessor in its relationship to other personality variables.     

Lateralized hemisphere activity in relation to personality and degree course

Personality dimensions of Psychoticism (P), Extraversion (E) and Neuroticism (N) were related to multiple measures of lateralized hemispheric processing in order to test the predictions of right hemisphere overactivation in E, right hemisphere underactivation in N, and left hemisphere under- activation/overactivation in P. It was also predicted that architecture students would be characterized by right hemisphere activation and language students by left hemisphere activation. Lateral eye movements, verbal and nonverbal dichotic listening tasks, and Block Design and Digit Span subtests of the WAIS were assessed in 43 undergraduates, together with personality and degree course. High P scores were characterized by fewer rightward eye movements and hence reduced left hemisphere activation, while high N scores were characterized by poorer Block Design and superior Digit Span performance. These results which indicate a relationship between Psychoticism and left hemisphere underactivation are in conflict with the finding of Raine and Manders (1988) (Br. J. Clin. Pschol. In press) overactivation in those with high schizoid personality scores, a discrepancy which may be resolved by the notion that P reflects a different form of psychosis-proneness to other schizoid scales.     

A cross-cultural study of personality: Swedish and English children

Five hundred and thirty-one Swedish boys and 559 Swedish girls completed the Junior Eysenck Personality Questionnaire (J.EPQ) translated into Swedish by the authors (A.-L.v.K. and L.v.K.). Factor comparisons indicated virtually identical factors of Psychoticism (P) Extraversion (E), Neuroticism (N) and social desirability—Lie (L)—in Sweden as in England. Slight item additions produced scales with adequate reliabilities. Sex differences were in line with most studies, i.e. boys scoring higher than girlson Psychoticism (P) but lower on Neuroticism (N) and Lie (L). Finally, the only significant cross-cultural difference between Swedish and Engish children proved to be on Neuroticism (N) where the Swedish children had much lower scores than the English children.     

The spiral aftereffect and personality

Reported duration of the spiral aftereffect was correlated with scores on the four scales of the Eysenck Personality Questionnaire and with the Psychoticism (P) scale from the unpublished PEN Inventory. There was a strong positive correlation between PEN P and duration. None of the other correlations approached statistical significance.     

An evaluation of the relationship between Gray’s revised RST and Eysenck’s PEN: Distinguishing BIS and FFFS in Carver and White’s BIS/BAS scales

Recent revisions of Gray’s reinforcement sensitivity theory (RST) have important implications for self-report measures of approach and avoidance behaviours and how Gray’s model relates to other personality models. In this paper, we examine the revised RST by comparing Carver and White’s (1994) original one-factor solution of the BIS scale with two alternative two-factor solutions separating BIS-Anxiety and FFFS-Fear. We also examine the relationships between Eysenck’s PEN and revised RST factors. Two hundred and twelve participants completed Carver and White’s BIS/BAS scales and Eysenck’s Personality Questionnaire-Revised. Confirmatory factor analyses of the original BIS scale showed that the hypothesized two-factor model of BIS-Anxiety and FFFS-Fear was the best fit to these data. Associations between the revised RST and Eysenck’s PEN were examined using path analysis. In line with theoretical predictions, Psychoticism was related to revised BIS-Anxiety and BAS, Neuroticism to revised BIS-Anxiety and FFFS-Fear, and extraversion to BAS and FFFS-Fear. Distinctions between BAS subscales and their associations to BIS, N and P were made in terms of past, present and future focus. Possible explanations for mixed findings in the literature and implications for future research are discussed.     

The P-psychopathy continuum: Facets of Psychoticism and their associations with psychopathic tendencies

Eysenck proposed that psychopathy is at the extreme end of the Psychoticism (P) personality dimension (Eysenck & Eysenck, 1976). This study examined (i) whether psychopathy-relevant P items of the EPQ-R can form psychometrically valid facets that map onto the conceptualization of the two-, three- or four-factor models of psychopathy using confirmatory factor analysis (N = 577) in a normal population; and (ii) whether those P-facets have criteria-related validity in associations with self-reported primary and secondary psychopathy, impulsivity (subsample N = 306), and measures of trait empathy and aggression (subsample N = 212). The four-factor model incorporating affective, interpersonal, impulsive, and antisocial facets of P was superior to the two-factor model; however, the three-factor conceptualization excluding the antisocial P-facet was the best fit. The facets show predicted divergent associations with primary and secondary self-reported psychopathy and trait measures. Findings are discussed in light of Eysenck’s P-psychopathy continuity hypothesis and the applicability of facet approaches to the prediction of psychopathic and antisocial tendencies.     

A possible association between HLA B-27 and vulnerability to schizophrenia

The frequency of HLA B-27 has been found to be increased in schizophrenic patients, especially in those with a positive family history of schizophrenia. In the present study, psychiatrically healthy arthropathic patients bearing HLA B-27 were found to have significantly higher P scores as compared to arthropathic patients without this antigen. Psychoticism could be seen as a trait of the personality at high-risk for schizophrenia. Thus, the present finding suggests an association between HLA B-27 and the genetic vulnerability to some forms of schizophrenia.     

A comparison between three and five factor models of Pakistani personality data

The Eysenck Personality Questionnaire-Revised (EPQ-R), the Eysenck Personality Profiler Short Version (EPP-S), and the Big Five Inventory (BFI-V4a) were administered to 135 postgraduate students of business in Pakistan. Whilst Extraversion and Neuroticism scales from the three questionnaires were highly correlated, it was found that Agreeableness was most highly correlated with Psychoticism in the EPQ-R and Conscientiousness was most highly correlated with Psychoticism in the EPP-S. Principal component analyses with varimax rotation were carried out. The analyses generally suggested that the five factor model rather than the three-factor model was more robust and better for interpretation of all the higher order scales of the EPQ-R, EPP-S, and BFI-V4a in the Pakistani data. Results show that the superiority of the five factor solution results from the inclusion of a broader variety of personality scales in the input data, whereas Eysenck's three factor solution seems to be best when a less complete but possibly more important set of variables are input.     

Factor structure and psychometric features of the Italian version for the EPQ-R

Factor structure and psychometric properties of the Eysenck Personality Questionnaire—Revised were investigated in an Italian sample of 553 subjects (328 females and 225 males). The main psychometric features of the questionnaire are similar to those reported for the original English form. Factor analysis, however, showed six (out of 32) items of the P scale, referring chiefly to compliance to formal rules of conduct, to have their highest loadings on the Lie factor. The consistency of this finding with previous results suggests that, in the Italian context, these items tend to be more closely connected with the social conformity aspect of the Lie scale than with the psychopathy facet of Psychoticism and should be excluded from the scoring of the P dimension.     

The relationship of personality to antisocial and neurotic behaviours as observed by teachers

Eight hundred and eight children in normal schools between the ages of 7 and 16 yr were rated on Rutter's Teachers' Rating Scale, and completed the EPQ giving Psychoticism (P), Extraversion (E), Neuroticism (N) and Lie (L). The children also reported on their own misbehaviour and social attitudes. Children exhibiting Antisocial behaviours were markedly high on P; also scoring low on L, and reporting non-conforming behaviour and attitudes. Children showing Neurotic behaviours did not have particularly distinctive personality scores, but were rather extraverted and conforming (high L). There was no relationship between Neuroticism as a disorder and Neuroticism as a personality trait. It is suggested that the P scale might usefully assist in the detection of antisocially disturbed children or in the selection of ‘high risk’ groups.     

Individual differences in cognitive control: The role of psychoticism and working memory in set‐shifting

Set‐shifting refers to a process of cognitive control which is shown through flexible behavioural adaptation to changes in task parameters or demands, such as the switching of an explicit rule (extra‐dimensional rule shifting) or the reversal of a reinforcement‐contingency (reversal‐learning). Set‐shifting deficits are widely documented in specific neuropsychological disorders, but seldom investigated in relation to normally‐occurring individual differences. In a sample of healthy adults (N=78, 28% male), we demonstrate that Working Memory and trait Psychoticism have independent involvement in extra‐dimensional rule shifting as measured using an analogue of the Wisconsin Card Sorting Test. Only Psychoticism, however, was involved in reversal‐learning, as assessed using a recent modification of the Iowa Gambling Task. Individual differences in extra‐dimensional rule shifting were explained in terms of rule abstraction speed, while individual differences in reversal‐learning were explained in terms of response perseveration. These results clarify component processes in different forms of set‐shifting, and highlight the role of individual differences, especially personality, in cognitive control.     

The psychophysiology of James Bond: phasic emotional responses to violent video game events

The authors examined emotional valence- and arousal-related phasic psychophysiological responses to different violent events in the first-person shooter video game "James Bond 007: NightFire" among 36 young adults. Event-related changes in zygomaticus major, corrugator supercilii, and orbicularis oculi electromyographic (EMG) activity and skin conductance level (SCL) were recorded, and the participants rated their emotions and the trait psychoticism based on the Psychoticism dimension of the Eysenck Personality Questionnaire--Revised, Short Form. Wounding and killing the opponent elicited an increase in SCL and a decrease in zygomatic and orbicularis oculi EMG activity. The decrease in zygomatic and orbicularis oculi activity was less pronounced among high Psychoticism scorers compared with low Psychoticism scorers. The wounding and death of the player's own character (James Bond) elicited an increase in SCL and zygomatic and orbicularis oculi EMG activity and a decrease in corrugator activity. Instead of joy resulting from victory and success, wounding and killing the opponent may elicit high-arousal negative affect (anxiety), with high Psychoticism scorers experiencing less anxiety than low Psychoticism scorers. Although counterintuitive, the wounding and death of the player's own character may increase some aspect of positive emotion.     

Personality profiles of women attending an artificial insemination by donor clinic

The EPQ was administered to 43 women attending an artificial insemination by donor (AID) clinic. The results indicated that relative to age-norms, the women were significantly lower on Psychoticism and Neuroticism, and significantly higher on the Lie scale. There were no differences between those women who did, and those who did not, become pregnant over a 6-month period. On the basis of the personality scores obtained, we would describe women attending AID clinics as calm, controlled individuals who have chosen, in conjunction with their partner, what is a socially-acceptable solution to the problem.     

Determinants of educational achievement at 16+: Intelligence,personality, home background and school

The classical path model linking home background with IQ and school type to educational attainment is extended by the inclusion of the EPQ and new questionnaires measuring Status Aspiration and Work Ethic. In a study of approx. 700 adolescents it was shown that Psychoticism and Status Aspiration are significant variables in the prediction of educational achievement. The most important determinant of educational attainment was found to be intelligence.     

The influence of psychoticism and extraversion on classical eyelid conditioning using a paraorbital shock UCS

An experiment is described in which the effects of Psychoticism and Extraversion on classical eyelid conditioning were examined using a balanced design involving two levels of paraorbital shock intensity and two levels of response threshold. Questionnaire measures of Anxiety and Impulsivity were also analysed together with subjective ratings of the UCS. Results were broadly consistent with Eysenck's personality theory in that subjects scoring high on Psychoticism demonstrated lower levels of conditioning.