To Challenge the Morning Lark and the Night Owl: Using Smartphone Sensing Data to Investigate Day–Night Behaviour Patterns

For decades, day–night patterns in behaviour have been investigated by asking people about their sleep–wake timing, their diurnal activity patterns, and their sleep duration. We demonstrate that the increasing digitalization of lifestyle offers new possibilities for research to investigate day–night patterns and related traits with the help of behavioural data. Using smartphone sensing, we collected in vivo data from 597 participants across several weeks and extracted behavioural day–night pattern indicators. Using this data, we explored three popular research topics. First, we focused on individual differences in day–night patterns by investigating whether ‘morning larks’ and ‘night owls’ manifest in smartphone-sensed behavioural indicators. Second, we examined whether personality traits are related to day–night patterns. Finally, exploring social jetlag, we investigated whether traits and work weekly day–night behaviours influence day–night patterns on weekends. Our findings highlight that behavioural data play an essential role in understanding daily routines and their relations to personality traits. We discuss how psychological research can integrate new behavioural approaches to study personality.     

Behavioural Consistency Within the Prisoner's Dilemma Game: The Role of Personality and Situation

Mixed‐motive games represent situations that confront people with a conflict between cooperative and non‐cooperative alternatives. Despite this common basis, recent research has shown that the consistency of people's choices across different mixed‐motive games is rather low. The present research examined behavioural consistency within the same mixed‐motive game, by presenting participants with a series of one‐shot Prisoner's Dilemma Games. Across this set of games, payoffs were manipulated in order to intensify or weaken the conflict between self and the other party while maintaining the game's underlying structure. Our findings indicate that significant differences in choice behaviour are observed as a function of both situational (i.e. manipulations of the Prisoner's Dilemma Game's payoff structure) and personality differences (i.e. individual differences in personality and motivational traits). Moreover, our included situational variables and personality features did not interact with each other and were about equally impactful in shaping cooperation. Crucially, however, despite the significant behavioural differences across game variants, considerable consistency in choices was found as well, which suggests that the game's motivational basis reliably impacts choice behaviour in spite of situational and personality variations. We discuss implications for theorizing on mixed‐motive situations and elaborate on the question how cooperation can be promoted. © 2018 European Association of Personality Psychology     

Situation-Behavior Profiles as a Locus of Consistency in Personality

Traditional approaches have long considered situations as "noise" or "error" that obscures the consistency of personality and its invariance. Therefore, it has been customary to average the individual's behavior on any given dimension (e.g., conscientiousness) across different situations. Contradicting this assumption and practice, recent studies have demonstrated that by incorporating the situation into the search for consistency, a new locus of stability is found. Namely, people are characterized not only by stable individual differences in their overall levels of behavior, but also by distinctive and stable patterns of situation-behavior relations (e.g., she does X when A but Y when B ). These if . . . then . . . profiles constitute behavioral "signatures" that provide potential windows into the individual's underlying dynamics. Processing models that can account for such signatures provide a new route for studying personality types in terms of their shared dynamics and characteristic defining profiles.     

The consistency of inconsistency in serial homicide: patterns of behavioural change across series

Linkage analysis is a crucial part of the investigative process when faced with a possible series of related offences. Establishing behavioural consistency (i.e., offender's behaviours consistently present across the series) is at the core of linkage. Recent empirical studies have found little evidence of consistency looking at either individual or groups of behaviours in serial homicide. It is argued that behavioural changes are rooted in the changing cognitive strategies that offenders use to reach their ultimate goal (i.e. the commission of multiple homicides). Factors that could account for these changes include learning, situational factors, loss of control, and changes in the offender's fantasy. Patterns of behavioural change have been identified in serial crimes, such as rape. However, no empirical studies have looked at patterns of behavioural change in serial homicide. The present study examined patterns of consistency and change using a combination of thematic and behavioural subgroup approaches that use Multidimensional Scaling. Thematic differentiation indicative of behavioural manifestations of cognitive strategies was found in all three examined subgroups: planning, wounding, and offender–victim interaction, and patterns of change within these subgroups provided support for the above theories. Looking at behavioural patterns rather than individual behaviours, may be a more fruitful way of examining consistency in serial homicide, and could have significant implications for linkage analysis. Copyright © 2010 John Wiley & Sons, Ltd.     

Consistent individual differences in associative learning speed are not linked to boldness in female Atlantic mollies

Recent studies on consistent individual differences in behavioural tendencies (animal personality) raised the question of whether individual differences in cognitive abilities can be linked to certain personality types. We tested female Atlantic mollies (Poecilia mexicana) in two different classical conditioning experiments. For the first time, we provide evidence for highly consistent individual differences in associative learning speed in fish. We characterized the same individuals for boldness in two experimental situations (latency to emerge from shelter and freezing time after a simulated predator attack) and found high behavioural repeatability. When we tested for a potential correlation between associative learning speed and boldness, however, there was no evidence for a link between them. Our study design included several steps to avoid typical pitfalls of disadvantaging shy individuals during learning tests. We caution that other experimental studies may have suffered from erroneous interpretations due to a more cautious coping style of shy individuals in the respective setup used to assess learning.     

Distinguishing between authenticity and personality consistency in predicting well-being: A mixed method approach

Introduction

The relationship between role personality consistency and well-being is somewhat ambiguous, with past research relying on methods confounded by social desirability or role stereotypes, or conflating consistency with authenticity.

Within-individual variability in self-concepts and personality states: Applying density distribution and situation-behavior approaches across cultures

Within-individual variability in self-concepts and everyday personality states and affects was investigated in two experience sampling studies using density distribution and situation-behavior approaches. In all seven cultures sampled, within-individual variability was substantial and self-concept and personality state variability exhibited moderate convergence. Variability in personality and affect states was moderately predicted by perceived need satisfaction in the situations. The density distribution and situation-behavior approaches were moderately convergent in identifying the most variable individuals, but the pattern of cultural differences differed in the two methods. Contrary to cultural psychology perspectives, cultural differences in within-individual variability did not consistently correspond to cultural differences in individualism–collectivism, dialecticism, or tightness.     

Situation-based contingencies underlying trait-content manifestation in behavior

Two studies investigated whether situations are associated with the manifestation of Big Five trait contents in behavior. Several times per day for 2 or 5 weeks, participants reported their current Extraversion, Agreeableness, Conscientiousness, and Emotional Stability states and rated the concurrent situation on several characteristics. Multilevel models tested for the average individual's contingency of each Big Five state on each situation characteristic and for whether individuals differed from each other reliably in those contingencies. Results showed that (1) there are psychologically active characteristics of situations on which trait-manifesting behavior is contingent; (2) contingencies on psychologically active characteristics of varying situations are part of the explanation for the sizeable within-person variability in behavior; (3) individuals differ reliably in their contingencies, and such individual differences may partially explain individual differences in amount of variability; and (4) the situation characteristics that are psychologically active differ by trait. These findings suggest that within-person variability in personality states is meaningful and is related to situations, that personality psychology should characterize situations in terms of their relevance to personality states, and that process and individual-difference structure approaches can be integrated in personality psychology.     

An observational measure of children's behavioural style: Evidence supporting a multi‐method approach to studying temperament

This study demonstrates the potential utility of the Behavioural Style Observational System (BSOS) as a new observational measure of children's behavioural style. The BSOS is an objective, short and easy to use measure that can be readily adapted to a variety of home and laboratory situations. In the present study, 160 mother–child dyads from the Concordia Longitudinal Risk Project (CLRP) were observed during an 11‐min behavioural sample. Videotaped interactions were coded using the BSOS for children's mood, activity level, vocal reactivity, approach to toys, mood consistency and adaptability. Comparisons between the BSOS observational ratings and mothers' ratings of the child on the EAS Temperament Survey (EAS) provided support for modest congruence between these two measurement systems, and revealed a differential predictive pattern of children's functioning. Specifically, the observation‐based BSOS predicted children's cognitive performance and adaptive behaviour during testing, whereas the mother‐rated EAS predicted maternal ratings of children's internalizing and externalizing behaviour problems. Both measures were found to independently predict mothers' ratings of parenting stress. Overall, the findings imply that neither observational measures nor maternal ratings alone are sufficient to understand children's behavioural style, and that comprehensive evaluations of children's temperament should optimally include both types of measures. Copyright © 2004 John Wiley & Sons, Ltd.     

Individual response profiles in the behavioral assessment of personality

A long-standing problem in the behavioural assessment of personality is the individual specificity of responses. Often, different persons externalize the same trait in different responses. One solution to this problem is to aggregate many different responses. The paper compares the power of response aggregation for predicting self-and other-ratings of personality with two alternative strategies of response selection: the nomothetic strategy of selecting the response with the highest overall predictive power, and the more idiographic strategy of selecting, for each individual, the most extreme response. Seventy subjects were videotaped in a sequence of social situations inducing shyness to various degrees. Five different nonverbal measures of shyness all correlated significantly with the subjects' self- or other-rated shyness, and showed low correlations across subjects and a substantial cross-situational consistency of response profiles. Response aggregation and both strategies of response selection were found to be equally powerful in predicting the subjects' self- and other-ratings of shyness from the five behavioural responses. Therefore, these findings somewhat dampen the hope often expressed in recent theoretical discussions of personality assessment that more respect for the individual case may improve nomothetic assessment procedures.     

Nomothetic and idiothetic measurement in personality

Lamiell (1981, 1982a) has recently advanced an idiographic approach to the measurement of personality that he has labeled “idiothetic” In contrast to classical nomothetic strategies, the idiothetic method of scaling personality traits discounts normative transformations of attribute scores and, according to Lamiell, provides the basis for a useful index of cross–situational behavior consistency An analysis of Lamiell's procedures indicates several problems with the idiothetic approach to personality assessment and with the proposed measure of behavior consistency Notable is the fact that the method does not account for base rates of behavior in situations and, therefore, may suggest anomalous interpretations of personality characteristics and of behavior consistencies It is argued that conventional nomothetic methods are sufficient for the goals of explaining and predicting behavior     

A new cognitive behavioural approach to the treatment of obesity

While behavioural approaches to the management of obesity are often successful in achieving clinically significant weight loss, the weight lost is generally regained. The great majority of patients return to their pre-treatment weight within 3 years. There have been attempts to improve the long-term effectiveness of behavioural treatment but the results have been disappointing. In this paper we suggest that, among other factors, this is because of the neglect of the contribution of cognitive factors to weight regain, and because there is often ambiguity over the goals of treatment. We present a cognitive behavioural analysis of the processes involved in weight regain, and we describe a new cognitive behavioural treatment derived from it. This treatment is designed to minimise the problem of weight regain by addressing psychological obstacles to the acquisition of, and long-term adherence to, effective weight-control behaviour.     

动物个体差异研究对人格心理学的贡献

动物个体差异的研究与人格心理学的关系已经引起了很多学者的关注。虽然对动物个体差异有许多相关描述,但文章采用一个广泛的工作定义,即动物在不同的情景下一致表现出来的一套相关行为。对动物个体差异的测量需要考虑物种间的可比较性和物种内的充分性。文章从人格结构的探讨,遗传和环境的作用,理解人格与认知、健康的关系,以及个体与环境的匹配等方面讨论和分析了动物个体差异的研究对人格心理学的可能贡献     

Accurate diagnosis of personality disorders: Some critical factors

Issues pertaining to the accurate diagnosis of personality disorders are discussed from a scientist-practitioner perspective. An attempt is made to distinguish state (Axis I) from trait (Axis II) disorders, and personality (“normal”) from personality disorders (“abnormal”). The reliability and validity of personality disorder diagnoses are explored, and the four criteria for all personality disorder diagnoses are clarified: These criteria are: 1) presence of psychological symptomology, 2) stability over time, 3) consistency across situations, and 4) under-responsiveness to currently available treatments. Also, a distinction is made between categorical and dimensional diagnostic criteria, similar to the distinction between personality type and trait approaches. Recommendations are provided for improving the clinical and empirical work in this area, and implications for treatment are discussed.     

The relation of personality types to physiological,behavioural, and cognitive processes

Three personality types, labeled resilient, over‐controlled, and under‐controlled, were identified through cluster analysis of classroom observations of 63 children, and used to understand biological, cognitive, and behavioural processes that influence academic achievement and aggression. Resilient children were found to be high in trait cortisol and high in academic achievement. Under‐controlled and over‐controlled children showed the greatest change in cortisol levels under stress, low levels of academic achievement, and attributed hostility to others in ambiguous situations. Under‐controlled children also exhibited high levels of externalizing behaviour in the classroom. The findings suggest that the single processes or traits assessed in this study do not mediate the associations of personality types to academic achievement and behaviour. The implications of the findings for the personality type construct and for personality processes are discussed. Copyright © 2005 John Wiley & Sons, Ltd.     

Mapping the Landscape of Personality in Childhood and Adolescence

From infancy, children vary in their typical emotions and behaviors, and by the middle of childhood, children have richly differentiated personalities. In this paper, I review the personality differences that youths exhibit from early childhood through adolescence, using a three-part taxonomy developed by (McAdams, D. P., & Pals, J. L. American Psychologist, 2006; 61, 204–217). First, children exhibit a dispositional signature, including first temperament traits and later the Big Five personality traits, which show some consistency across situations and over time. Second, youths display characteristic adaptations that are more specific to particular life contexts; these include mental representations, strategies, and goals. Third, adolescents form personal narratives, stories about their lives that reflect and shape their identities. I describe the differences youths exhibit in these three domains and situate these differences in the context of overall development in childhood and adolescence. New work on youths’ personalities can serve as the foundation for future lifespan perspectives on personality development.     

Towards a resolution of the personality triad: Persons,situations, and behaviors

The issue of the variant vs. invariant in personality often arises in different forms of the “person–situation” debate, which is based on a false dichotomy between the personal and situational determination of behavior. Previously reported data are summarized that demonstrate how behavior can vary as a function of subtle situational changes while individual consistency is maintained. Further discussion considers the personal source of behavioral invariance, the situational source of behavioral variation, the person–situation interaction, the nature of behavior, and the “personality triad” of persons, situations, and behaviors, in which each element is understood and predicted in terms of the other two. An important goal for future research is further development of theories and methods for conceptualizing and measuring the functional aspects of situations and of behaviors. One reason for the persistence of the person situation debate may be that it serves as a proxy for a deeper, implicit debate over values such as equality vs. individuality, determinism vs. free will, and flexibility vs. consistency. However, these value dichotomies may be as false as the person–situation debate that they implicitly drive.     

Self‐esteem: a behavioural genetic perspective

Self‐esteem, the affective or evaluative appraisal of one's self, is linked with adaptive personality functioning: high self‐esteem is associated with psychological health benefits (e.g. subjective well‐being, absence of depression and anxiety), effective coping with illness, and satisfactory social relationships. Although several pathways have been hypothesized to effect within‐family transmission of self‐esteem (e.g. parenting style, family relationship patterns), we focus in this article on genetic influences. Genetic studies on both global and domain‐specific self‐esteem and on both level and stability of self‐esteem converge in showing that (i) genetic influences on self‐esteem are substantial, (ii) shared environmental influences are minimal, and (iii) non‐shared environmental influences explain the largest amount of variance in self‐esteem. We advocate that understanding of current issues in self‐esteem research will be enriched by including behavioural genetic approaches. Copyright © 2002 John Wiley & Sons, Ltd.     

Some methodological and training/funding perspectives on the future of personality research

This article provides some methodological and training/funding perspectives on the future of personality research. Traditional correlational approaches to personality data have been useful, but approaches that address the data in new ways (e.g., mean structure, variance structure) permit researchers to ask interesting new research questions, particularly of short- and long-term longitudinal data. Advances and issues in the measurement of personality dimensions, types, situations, and biological markers are considered. Given the shrinkage of training programs in personality, new approaches to training are proposed to take advantage of resources across universities. Finally, some potential unanticipated costs for core personality research of the increased emphasis on grant funding at many universities are considered.