Personality Psychology in the First Decade of the New Millennium: A Bibliometric Portrait

Nine principal personality psychology journals—Journal of Personality and Social Psychology (JPSP), Journal of Personality (JP), Journal of Research in Personality (JRP), European Journal of Personality (EJP), Personality and Individual Differences (PAID), Personality and Social Psychology Bulletin (PSPB), Personality and Social Psychology Review (PSPR), Journal of Personality Assessment (JPA), and Journal of Personality Disorders (JPD)—have published 8510 research papers from 2001 to 2010. These papers have been cited 149 108 times (September 2011) by papers published in journals indexed in the Web of Science. Although personality psychologists from the US published the largest number of papers (4924, 57.9%) and had the largest number of citations (101 875, 68.3%), their relative contribution to personality literature has slightly diminished during the first decade of the new millennium. Unlike other countries, personality psychologists residing in the US demonstrated a strong country self‐citation bias: They were about 14% more likely to cite papers which were written by their compatriots rather than non‐US authors in three leading journals JPSP, PSPB, and PSPR. The intensity and pattern of citations indicate that personality psychology indeed occupies one of the core positions at the heart of psychological knowledge. Copyright © 2012 John Wiley & Sons, Ltd.     

Who published what about whom?

Each study (n = 1,170) in the Journal of Personality Assessment and its predecessor (1968 through 1982) was reviewed to determine the affiliation of authors, personality measures commonly used, type of study methodologies employed, and characteristics of subjects studied. Generally, there were no large trends or shifts in any of these across the 15-year survey period. The Rorschach continues to be a common subject for study, as does the MMPI; authors have typically been from academic rather than applied settings; validity and normative studies have been most common; and the most frequently used subjects have been college students. Objective tests have increased in frequency in JPA articles, while projectives, except for the Rorschach, have declined; and the majority of research subjects have been drawn from nonpathological populations. Implications for editorial policies and reader interest are discussed.     

Extraversion and neuroticism in team sport participants, individual sport participants, and nonparticipants

Scores on Extraversion and on Neuroticism as measured by the Eysenck Personality Inventory were compared for 90 undergraduate team sport participants, individual sport participants, and nonparticipants (43 men, 47 women, M age = 20.3 yr.). From past research and Eysenck's biological theory of personality, it was hypothesized that sport participants would score higher on Extraversion and lower on Neuroticism than nonparticipants, and that team participants would score higher on Extraversion and perhaps higher on Neuroticism than individual sport participants. By comparing scores for students in first year and final year, it was also investigated whether pre-existing personality differences drew people to sport (the gravitational hypothesis) or whether personality changed as a function of sport participation (the developmental hypothesis). The main findings were that team participants scored higher on Extraversion than both individual sport participants and nonparticipants, and that test scores did not change over time, supporting the gravitational hypothesis for Extraversion.     

Culture and Thought (Book)

The Comrey Personality Scales (CPS) were used to examine the personality structure of 176 Mexican American college students. A majority of the eight factors maintained substantial loadings and corresponded closely with Comrey's normative sample as well as with Brazilian and New Zealand samples. Two factors, Conformity and Orderliness, showed the weakest fit across all four groups. Overall, the CPS shows adequate measurement properties for "normal" personality assessment among Mexican Americans and is preferable to instruments such as the Minnesota Multiphasic Personality Inventory (MMPI). However, the external validity of the CPS with clinical populations must first be determined prior to its use to assess psychopathology among Mexican Americans.     

Enhanced visual performance in obsessive compulsive personality disorder

Visual performance is considered as commanding modality in human perception. We tested whether Obsessive–compulsive personality disorder (OCPD) people do differently in visual performance tasks than people without OCPD. One hundred ten students of Ferdowsi University of Mashhad and non‐student participants were tested by Structured Clinical Interview for DSM‐IV Axis II Personality Disorders (SCID‐II), among whom 18 (mean age = 29.55; SD = 5.26; 84% female) met the criteria for OCPD classification; controls were 20 persons (mean age = 27.85; SD = 5.26; female = 84%), who did not met the OCPD criteria. Both groups were tested on a modified Flicker task for two dimensions of visual performance (i.e., visual acuity: detecting the location of change, complexity, and size; and visual contrast sensitivity). The OCPD group had responded more accurately on pairs related to size, complexity, and contrast, but spent more time to detect a change on pairs related to complexity and contrast. The OCPD individuals seem to have more accurate visual performance than non‐OCPD controls. The findings support the relationship between personality characteristics and visual performance within the framework of top‐down processing model.     

Personality structure of Mexican Americans using the Comrey Personality Scales

The Comrey Personality Scales (CPS) were used to examine the personality structure of 176 Mexican American college students. A majority of the eight factors maintained substantial loadings and corresponded closely with Comrey's normative sample as well as with Brazilian and New Zealand samples. Two factors, Conformity and Orderliness, showed the weakest fit across all four groups. Overall, the CPS shows adequate measurement properties for "normal" personality assessment among Mexican Americans and is preferable to instruments such as the Minnesota Multiphasic Personality Inventory (MMPI). However, the external validity of the CPS with clinical populations must first be determined prior to its use to assess psychopathology among Mexican Americans.     

‘Grandpa,Do You Like Roller Coasters?’: Identifying Age‐Appropriate Personality Indicators

Personality development research heavily relies on the comparison of scale means across age. This approach implicitly assumes that the scales are strictly measurement invariant across age. We questioned this assumption by examining whether appropriate personality indicators change over the lifespan. Moreover, we identified which types of items (e.g. dispositions, behaviours, and interests) are particularly prone to age effects. We reanalyzed the German Revised NEO Personality Inventory normative sample (N = 11,724) and applied a genetic algorithm to select short scales that yield acceptable model fit and reliability across locally weighted samples ranging from 16 to 66 years of age. We then examined how the item selection changes across age points and item types. Emotion‐type items seemed to be interchangeable and generally applicable to people of all ages. Specific interests, attitudes, and social effect items—most prevalent within the domains of Extraversion, Agreeableness, and Openness—seemed to be more prone to measurement variations over age. A large proportion of items were systematically discarded by the item‐selection procedure, indicating that, independent of age, many items are problematic measures of the underlying traits. The implications for personality assessment and personality development research are discussed. © 2019 European Association of Personality Psychology     

Psychometric and Validity Issues in Machine Learning Approaches to Personality Assessment: A Focus on Social Media Text Mining

In the age of big data, substantial research is now moving toward using digital footprints like social media text data to assess personality. Nevertheless, there are concerns and questions regarding the psychometric and validity evidence of such approaches. We seek to address this issue by focusing on social media text data and (i) conducting a review of psychometric validation efforts in social media text mining (SMTM) for personality assessment and discussing additional work that needs to be done; (ii) considering additional validity issues from the standpoint of reference (i.e. ‘ground truth’) and causality (i.e. how personality determines variations in scores derived from SMTM); and (iii) discussing the unique issues of generalizability when validating SMTM for personality assessment across different social media platforms and populations. In doing so, we explicate the key validity and validation issues that need to be considered as a field to advance SMTM for personality assessment, and, more generally, machine learning personality assessment methods. © 2020 European Association of Personality Psychology     

Personality and Coping: Three Generations of Research

ABSTRACT This article introduces the Journal of Personality 's special issue on coping and personality. It first presents a historical overview of the psychological study of how people cope with stress and identifies three generations of theory and research: (a) the psychoanalysts and the ego development school, which tended to equate personality and coping strategies; (b) the transactional approach, which appeared in the 1960s and emphasized situational and cognitive influences on coping while downplaying the role of individual differences; and (c) the most recent, "third generation," whose work is represented in this special issue and focuses on the role of personality in coping while maintaining strong operational distinctions among coping, personality, appraisal, and adaptational outcomes. This introduction concludes with a discussion of unresolved conceptual and methodological issues and a brief orientation to the third-generation articles that follow in this special issue.     

Cross-sectional age differences and longitudinal age changes of personality in middle adulthood and old age

The present study examines different aspects of personality continuity (or change) in middle adulthood and old age both cross-sectionally and longitudinally. The sample comprised 445 middle-aged (42-46 years) and 420 older (60-64 years) participants, reassessed after a 4-year interval. Personality was measured using the NEO-FFI personality inventory. After having established strict factorial invariance, factor covariances were found to be equal for both age groups and at both testing occasions, indicating perfect structural continuity of personality. A number of age differences in personality emerged at both measurement occasions. Longitudinally, in both age groups, an average decline in Neuroticism was observed. Longitudinal stability coefficients were around .80 in middle-aged and old participants, implying high, but not perfect, differential continuity. With respect to continuity of divergence, statistically significant cross-sectional age differences were found for the variance of Openness at both measurement occasions. Eventually, concerning specific versus general continuity, a variety of medium effect-sized correlated changes in the Big Five personality domains across the 4-year period was established, implying that personality changes share a certain amount of commonality.     

香港中学生人格特质的性别差异及其发展性分析

本文报告了新近发展的跨文化（中国人）个性测量表－青少年版（CPAI-A）对香港中学生人格特征的性别差异评估结果。CPAI-A是在CPAI-2（成人版）基础上发展而来的。研究发现性别是影响香港中学生人格特质的关键因素,并且性别差异在不同年龄组之间存在明显的延续性和发展性趋势。结合对已有研究的比较分析,文章从发展角度讨论了人格特质的性别差异特性在青少年不同年龄组之间的情形。文章还基于CPAI-2中国人常模的数据,比较分析了青少年与成人之间人格特征性别差异的特点。文章最后认为性别差异特征是体现人格特质在青少年期的不同年龄阶段,以及从青少年到成人阶段的发展性与稳定性的重要内容     

Sex differences in the Schizotypal Personality Questionnaire Brief among Japanese employees and undergraduates: A cross-sectional study

Schizotypal personality may be seen as an indicator predisposition to schizophrenia and psychosis proneness. Schizotypal personality traits behave differently depending on a person’s age and sex, but few studies have examined the causal relationship between age-related sex differences and schizotypal personality traits. The aim of the present study was to examine the relationship between the schizotypal personality and sex in different age groups. In our study, we used the Schizotypal Personality Questionnaire Brief (SPQ-B). Participants were 371 college students (107 men) with an age range from 18 to 25 years, and 322 working people (156 men) with an age range of 22–67 years. The results showed that the young adult males in the college student group had tendencies to score higher than females in the same group on the SPQ-B total score and its two subscale scores (the cognitive-perceptual and the interpersonal scores). In the adult sample taken in the working people group, the total score and subscale scores of the SPQ-B did not significantly discriminate male subjects from female subjects. These findings indicate that sex differences of schizotypal personality traits may reflect differential age-related variation.     

Unfolding the Measurement of the Creative Personality

Gough's Creative Personality Scale (CPS) is a self‐report personality inventory for creativity assessment. We investigated the undimensionality and the response process on the CPS from an ideal point (unfolding) perspective. The Graded Unfolding Model (GUM) was used to model binary responses and participants were 228 engineering students who completed a Greek version of the CPS. Results support the undimensionality of the CPS construct and suggest that unfolding measurement models may provide new insights to the assessment of creativity.     

Personality development from late adolescence to young adulthood: differential stability, normative maturity, and evidence for the maturity-stability hypothesis

This investigation examined personality development during the transition from adolescence to adulthood using the brief form of the Multidimensional Personality Questionnaire (Patrick, Curtin, & Tellegen, 2002). Parent and self-reports of personality were obtained in 1994 (average age=17.60 years), and self-reports were obtained in 2003 (average age=27.24 years). There was evidence of both differential stability and normative changes in the direction of increased functional maturity during this transition. Moreover, adolescents with more mature personalities in 1994 tended to show fewer personality changes from 1994 to 2003. These maturity-stability effects held when parent reports were used to assess personality. All told, there was evidence of both stability and change in personality during the transition to adulthood.     

The Role of Personality in Relation to Gender Differences in School Subject Choices in Pre-University Education

Boys and girls to some extent differ in personality characteristics while they also prefer different school subjects in secondary education. This study has attempted to unravel the relations among gender, personality, and students?? subject choices. The study was based on a sample of 1,740 9th grade pre-university students throughout the Netherlands (average age 15?years). We used the Five-Factor Personality Inventory (FFPI) of Hendriks, Hofstee, and De Raad (1999a) to measure the students?? personalities. The research questions were: (1) To what extent are students?? personality characteristics related to their subject choices in secondary education? (2) Do students?? personality characteristics mediate the gender ?C subject choice relation? And if yes, which personality characteristics are responsible for this? (3) Is the relation between personality characteristics and subject choices different for boys and girls? We found several associations between personality characteristics and students?? subject choices. Although the relationship between gender and students?? subject choices was slightly attenuated after the inclusion of the personality characteristics in the multinomial logistic regression analyses, gender remained an important predictor of the students?? choices. The personality factor Extraversion partially mediated the relation between gender and students?? choice of advanced mathematics, chemistry, and physics versus a more language and culturally-oriented set of school subjects. Furthermore, gender was found to moderate the relation between the personality factor Autonomy and students?? choice of advanced mathematics, chemistry, and physics versus a more language and culturally-oriented set of school courses.     

Assessing Personality States: What to Consider when Constructing Personality State Measures

Repeated assessments of personality states in daily diary or experience sampling studies have become a more and more common tool in the psychologist's toolbox. However, and contrary to the widely available literature on personality traits, no best practices for the development of personality state measures exist, and personality state measures have been developed in many different ways. To address this, we first define what a personality state is and discuss important components. On the basis of this, we define what a personality state measure is and suggest a general guideline for the development of such measures. Following the ABC of test construction can then guide the strategy for obtaining validity and reliability evidence: (A) What is the construct being measured? (B) What is the intended purpose of the measure? And (C) What is the targeted population of persons and situations? We then conclude with an example by developing an initial item pool for the assessment of conscientiousness personality states. © 2020 The Authors. European Journal of Personality published by John Wiley & Sons Ltd on behalf of European Association of Personality Psychology     

Personality stability in late adulthood: a behavioral genetic analysis

A sample of 833 twins from the Minnesota Twin Study of Adult Development and Aging completed the Multidimensional Personality Questionnaire (MPQ; Tellegen, 1982) twice, averaging 59.4 (sd=9.7) years of age at first and 64.4 (sd=10.2) years of age at second testing (average retest interval 5.0 years, sd=2.36, range 1.0-10.4 years). Both means and standard deviations of scale scores were extremely stable from first to second testing. In addition, sample participants tended to retain their rank order on the scales (average r=.76 across scales). Bivariate biometric analyses showed that the genetic influences on most of the scale scores were almost perfectly correlated across the two waves (range .95 to 1.00). The nonshared environmental influences were also highly correlated across the two waves (range .53 to .73). Models specifying identical variance components at the two time points and fixing the genetic correlation to 1.00 provided improved fit. The results suggest that the high stability of personality in later adulthood has a strong genetic foundation, supplemented by stability of environmental effects.     

A longitudinal study of high scorers on the hypomanic personality scale

Former college students (n = 36) identified by high scores on the Hypomanic Personality Scale (HYP; Eckblad & Chapman, 1986) were compared with control participants (n = 31) at a 13-year follow-up assessment. As hypothesized, the HYP group reported more bipolar disorders and major depressive episodes than the control group. The HYP group also exceeded the control group on the severity of psychotic-like experiences, symptoms of borderline personality disorder, and rates of substance use disorders. HYP group members with elevated scores on the Impulsive-Nonconformity Scale (Chapman et al., 1984) experienced greater rates of bipolar mood disorders, poorer overall adjustment, and higher rates of arrest than the remaining HYP or control participants.     

Methodological Trends in Journal of Personality 1970–1995

One hundred fifty randomly selected articles published in Journal of Personality from 1970 to 1995 were evaluated with regard to subject population, sampling, research design, dependent measures, statistical methods, methodological difficulty, sample size, manipulation of independent variables (for experimental studies), use of manipulation checks, and gender representation of authors and participants. Our findings support Endler and Speer's (this issue) conclusion that the typical study in personality research continues to use a cross-sectional design, questionnaire measures, and undergraduate participants. Echoing West et al.'s (1992) findings for Journal of Personality and Social Psychology, we found that whereas subject recruitment and design implementation appear to be less difficult than they were two decades ago, statistical analyses have become somewhat more complex.     

Coping With Unemployment: The Impact of Unemployment Duration and Personality on Trajectories of Life Satisfaction

Unemployment is a major life event that causes an enormous drop in people's life satisfaction. However, there is substantial variability in people's ability (or inability) to cope with the experience of unemployment. In the present study, we examined the causes of individual differences in trajectories of life satisfaction when people were faced with unemployment by taking into account the persistence of unemployment, pre‐event personality and age. Analyses were based on data from the German Socio‐Economic Panel. Using latent growth curve modelling, life satisfaction was investigated from 3 years before to 3 years after a person became unemployed in a total sample of 908 individuals. As expected, unemployment caused a substantial drop in life satisfaction that persisted for at least 3 years after the event. On average, individuals did not completely return to their previous satisfaction level. This pattern existed even for participants who re‐entered the labour market. Moreover, our results showed that variability in coping with unemployment can be explained in part by personality traits. For people with short periods of unemployment, Conscientiousness reinforced the negative effect of unemployment, whereas Extraversion softened the effect. In sum, our analyses showed that (a) the negative effect of unemployment on life satisfaction differs according to the length of the unemployment period and (b) personality partially moderates responses to unemployment over time. Copyright © 2015 European Association of Personality Psychology