Bridging the idiographic-nomothetic divide in ratings of self and others on the Big Five

Recent discussions of the idiographic-nomothetic debate were initially reviewed in this paper. Three important issues stemming from this debate were then expounded within the context of Personal Construct Theory and evaluated in an empirical study. Participants were required to rate themselves and people they knew on 25 marker items for the Big Five personality traits and on 12 of their own unique personal constructs. The ratings were analyzed using a number of novel statistical methods, including a simple type of confirmatory factor analysis and an informative graphing procedure. Results indicated that at least half of the statistical information derived from the idiographic, personal construct ratings was unique when compared to ratings on the nomothetic Big Five items. The implications of these methods and results for person-centered and trait conceptualizations of personality were discussed.     

Implicit psychophysiology: Effects of common beliefs and idiosyncratic physiological responses symptom reporting

Every individual exhibits unique perceptual, behavioral, and physiological responses within and across a variety of settings. Despite the idiosyncratic nature of responses, we seek to establish theories that generalize across a large number of individuals. A strict idiographic method intensively examines the response patterns of a small number of individuals, whereas a nomothetic approach focuses on common responses across a large number of individuals. In the present investigation, we seek to learn how individuals perceive and report physical symptoms and sensations. We offer a methodology that capitalizes on the unique physiological responses of individuals but, at the same time, assumes that the underlying perceptual processes relevant to symptom reporting are comparable across individuals. Our approach, then, is both idiographic and nomothetic. As will be discussed, this integrative approach has the potential to be applied to a multitude of behaviors and processes that are of interest to social and personality psychologists.     

Experience Sampling Methods: A Modern Idiographic Approach to Personality Research

Experience sampling methods are essential tools for building a modern idiographic approach to understanding personality. These methods yield multiple snapshots of people's experiences over time in daily life and allow researchers to identify patterns of behavior within a given individual, rather than strictly identify patterns of behavior across individuals, as with standard nomothetic approaches. In this article, we discuss the origin and evolution of idiographic methods in the field of personality and explain how experience sampling methods function as modern day idiographic methods in this field. We then review four primary ways in which experience sampling methods have been used to foster idiographic approaches in personality research. Specifically, we highlight approaches that examine individual differences in temporal and behavioral distributions, situation–behavior contingencies, daily processes, and the structure of daily experience. Following a brief methodology primer, we end by discussing future directions for idiographic experience sampling approaches in personality psychology and beyond.     

Idiographic complexity and the common personality dimensions insensitivity,extraversion, neuroticism,and orderliness

This paper reports on an attempt to investigate empirically whether the common personality dimensions S or Insensitivity, E or Extraversion, N or Neuroticism, and G or Orderliness, as postulated in Van Kampen's modification of Eysenck's PEN model, would in principle give rise to the same level of predictive accuracy as a set of personal traits obtained in each of a series of assessments of separate individuals. Using a special methodology to ‘convert’ the nomothetic dimensions into factors that are of idiographic relevance, (within‐person) correlations and multiple correlations between the idiographic traits and the nomothetic dimensions S, E, N, and G (predictors) were computed in a sample of 83 subjects. Results showed that the idiographic traits could be expressed in most cases as linear combinations of the four idiographically converted nomothetic factors, and that the degree to which an individual's idiographic data could be explained nomothetically was unrelated to this individual's conformity to the nomothetic zero‐correlational structure of the four dimensions. Copyright © 2000 John Wiley & Sons, Ltd.     

Individual differences in client reactions to counseling and psychotherapy: A challenge for research

Recent research is reviewed that suggests extensive individual differences in how clients respond to therapeutic interventions and therapist response modes. Three research strategies are proposed as parts of a therapeutic science that aims at both nomothetic generalizations and explications of idiographic meanings, while simultaneously confronting conceptual and methodological complexities arising from client individual differences in response to counseling.     

Making the case for using personalised outcome measures to track progress in psychotherapy

The practice-based evidence movement has become increasingly influential in the practice of counselling. One element of this approach is the recommendation that therapists regularly administer standardised or nomothetic measures to track the progress made by their clients. When this feedback indicates that therapy is off course (i.e. out of kilter with the projected course of effective treatment) therapists are alerted to the risks of potential dropout and encouraged to take some form of corrective action. Despite an expanding evidence base supporting this strategy for improving psychotherapeutic outcomes, there are also concerns that the generic measures adopted do not always possess the specificity and sensitivity required to capture the unique experiences of individual clients. The paper argues that personalised or idiographic assessments can be designed to match the language and priorities of individual clients and so provide a more nuanced measure with which to track the course of therapy and promote informed reflective conversations between client and clinician on when and whether a change in direction is needed. However the idiographic alternative is not an easy option and practical as well as theoretical challenges in adopting this approach to monitoring treatment outcomes are acknowledged and discussed. Finally the virtue of using a strategy that combines nomothetic and idiographic measures is considered.     

Valuation theory,the self-confrontation method,and scientific personality psychology

This article presents an invited commentary on the two previous articles by Hermans and Bonarius (1991) and by Hermans (1991). Primary focus is placed on certain enduring confusions regarding the historic ‘nomothetic vs. idiographic’ controversy in personality psychology, the traces of those confusions in the writings of Hermans and Bonarius, and the importance of eliminating those confusions if the full potential of valuation theory and the self-confrontation method is to be realized, not only as a means of gaining idiographic knowledge and clinically helpful insights, but also as a means of gaining genuinely nomothetic knowledge in the domain of personality.     

Subjectifying the Personality State: Theoretical Underpinnings and an Empirical Example

Recent developments in personality research highlight the value of modelling dynamic state-like manifestations of personality. The present work integrates these developments with prominent clinical models addressing within-person multiplicity and promotes the exploration of models centred on state-like manifestations of personality that function as cohesive organizational units. Such units possess distinct subjective qualities and are characterized by specific affects, behaviours, cognitions, and desires that tend to be co-activated. As background, we review both theory and research from the fields of social cognition, psychotherapy, and psychopathology that serve as the foundation for such models. We then illustrate our ideas in greater detail with one well-supported clinical model—the schema therapy mode model, chosen because it provides a finite and definite set of modes (i.e. cohesive personality states). We assessed these modes using a newly developed experience-sampling measure administered to 52 individuals (four times daily for 15 days). We estimated intraindividual and group-level temporal and contemporaneous networks based on the within-person variance as well as between-person network. We discuss findings from exemplar participants and from group-level networks and address cross-model particularities and consistencies. In conclusion, we consider potential idiographic and nomothetic applications of subjective states dynamic personality research based on intensive longitudinal methods. © 2020 European Association of Personality Psychology     

The Nomothetic-Idiographic Debate in Family Therapy

This essay introduces the terms "nomothetic" and "idiographic" to characterize the current debate about whether the field of family therapy should accumulate and apply knowledge about patterns of adjustment that hold across different families, or whether the field should consider each family as utterly unique, and should tailor interventions solely on the basis of these unique qualities. Embedded in this debate are the arguments for and against quantitative research, disagreements about the value of clinical prediction and interobserver reliability, as well as the issue of whether therapists can rightfully claim to possess "expert knowledge." The essay begins with the personal-professional anecdote that stimulated me to explore this debate in greater depth. It continues with a brief discussion of the historical context of this debate, particularly noting the parallels between the methodological issues in personality research and those facing family therapy. The nomothetic-idiographic debate in family therapy theory, research, and practice is then described. The essay ends with the suggestion that family therapy view nomothetic and idiographic thinking as complementary, and that the field strive to develop an integrated, "idiothetic" approach to family therapy research and practice.     

Analysis of genetic influences on the consistency and variability of the Big Five across different stressful situations

Several studies have demonstrated that individual differences in personality traits, known as the Big Five, have a genetic component. These personality traits are considered important predictors of everyday behaviour. In addition to personality traits there are also factors in the environment that govern behaviour. This dual influence on behaviour is statistically reflected in a P × S interaction. This study examines the genetic and environmental influences on the interactions between a person and his daily life environment for the Big Five. Fifty‐seven identical twin pairs and 43 fraternal twin pairs participated in this study. Trait related behaviour was measured in 30 different situations with the aid of an SR inventory. The heritability coefficients for the main effect of P were in the normal range, varying between 0.35 for Agreeableness and 0.53 for Conscientiousness. The heritability coefficients for the P × S interactions were moderately high, explaining between 26% and 69% of the total P × S variance. The consequences of these results for general and behavioural genetic research on the Big Five will be discussed. Copyright © 2001 John Wiley & Sons, Ltd.     

Individual differences in metacontrast: An impetus for clearly specified new research objectives in studying masking and perceptual awareness?

While the majority of perceptual phenomena based research on consciousness is implicitly nomothetic, some idiographic perspective can be sometimes highly valuable for it. It may turn out that after having had a closer look at individual differences in the expression of psychometric functions a need to revise some nomothetic laws considered as the general ones arises as well. A study of individual differences in metacontrast masking published in this issue superbly illustrates this. A myriad of urgent research objectives emerges out of this study, most of them important both for clearing up the still messy theoretical picture on visual masking and for the beginning of asking whether perceptual awareness mechanisms are so universal at all. In this commentary the problems pertinent to this issue are discussed.     

Managerial Personality and Performance: A Semi-idiographic Approach

Understanding the relationship between personality and behavior requires accounting for a broad set of traits within each person and the demands of a specific role or situation. To address these requirements, we assessed the relevance or ordering of traits within an individual (an idiographic approach) and compared these orderings across individuals occupying similar organizational situations (a nomothetic approach). We illustrate the utility of this semi-idiographic approach with a longitudinal study of Masters of Business Administration (MBA) students. The MBAs whose personalities were more similar to a template of the successful young manager received more job offers upon graduating and, subsequently, earned higher salaries, were more likely to be working full-time, and had changed jobs less often than did those who fit the managerial template less well.     

Validation of idiosyncratic cognitive schema in cognitive case formulations: an intraindividual idiographic approach

This article describes a method for the intraindividual clinical validation of a cognitive case formulation (CCF) involving hypotheses about the patient's idiosyncratic cognitive schema (ICS). The two-stage approach begins by testing the convergent and discriminant validity of the hypothesized ICS against the individual's daily ratings of cognition items using confirmatory dynamic factor analysis. The second stage evaluates the extent to which the ICS factor scores predict daily variability in symptoms and distress and further addresses convergent and discriminant validity by evaluating intraindividual cognitive content specificity and the incremental validity of the idiographic cognition factors compared with nomothetic measures of thoughts/beliefs. This approach to validating idiographic assessment is illustrated with the CCF of a woman with comorbid mood and anxiety disorders.     

A new Big Five: fundamental principles for an integrative science of personality

Despite impressive advances in recent years with respect to theory and research, personality psychology has yet to articulate clearly a comprehensive framework for understanding the whole person. In an effort to achieve that aim, the current article draws on the most promising empirical and theoretical trends in personality psychology today to articulate 5 big principles for an integrative science of the whole person. Personality is conceived as (a) an individual's unique variation on the general evolutionary design for human nature, expressed as a developing pattern of (b) dispositional traits, (c) characteristic adaptations, and (d) self-defining life narratives, complexly and differentially situated (e) in culture and social context. The 5 principles suggest a framework for integrating the Big Five model of personality traits with those self-defining features of psychological individuality constructed in response to situated social tasks and the human need to make meaning in culture.     

New directions for research in personality and aging: A comprehensive model for linking levels,structures, and processes

A comprehensive lifespan model of personality is proposed that is based in developmental systems theory. The model integrates processes and structures within a level-of-analysis framework. The model builds on McAdams' (1995) delineation of three levels of personality but adds what is seen as necessary process constructs at each of the three structural levels he has identified. At Level I, the trait level, the parallel process construct is that of states. Level II constructs, or personal concerns, have their parallel in self-regulatory processes in service of individual goals. The Level III construct, the life story, has its process counterparts in social cognitive activities related to recounting life narratives, such as remembering, reminiscence, and storytelling. A brief overview of these six foci of personality demonstrates that each are firmly anchored in the aging research literature. It is argued that personality is most clearly revealed in later life and that this model allows examination of personality from both nomothetic and idiographic perspectives.     

Indirect personality assessment of the violent true believer

The violent true believer is an individual committed to an ideology or belief system which advances homicide and suicide as a legitimate means to further a particular goal. The author explores useful sources of evidence for an indirect personality assessment of such individuals. He illustrates both idiographic and nomothetic approaches to indirect personality assessment through comparative analyses of Timothy McVeigh, an American who bombed the federal building in Oklahoma City in 1995, and Mohamed Atta, an Egyptian who led the airplane attacks against the World Trade Center and the Pentagon in 2001. The risks of indirect personality assessment and ethical concerns are identified.     

Exploring Personality with the Interpersonal Circumplex

The interpersonal circumplex can serve as both companion and guide for those interested in exploring the interpersonal domain of personality. This article offers a relatively nontechnical overview of the model and its various applications in the study of personality. I begin by defining the interpersonal circumplex, its structure and in what sense it is 'interpersonal'. As part of that, I will briefly consider how circumplex measures of personality, such as the Interpersonal Adjective Scales, are typically evaluated for fit to the model. I will next describe applications of the model for exploring both the idiographic (person-centered) and nomothetic (variable-centered) realms of personality. In person-centered research, the circumplex leads to useful ways of summarizing the basic interpersonal features of a given individual. In variable-centered research, the circumplex can help elucidate the essential interpersonal meaning of personality constructs such as traits, problems, and motives. To explain how the circumplex can help us explore personality – idiographically and nomothetically – I will draw on a variety of studies, including several recent studies that extend the model in new ways.     

Leadership, collective personality, and performance

By viewing behavior regularities at the individual and collective level as functionally isomorphic, a referent-shift compositional model for the Big 5 personality dimensions is developed. On the basis of this compositional model, a common measure of Big 5 personality at the individual level is applied to the collective as a whole. Within this framework, it is also hypothesized that leadership (i.e., transformational, transactional, and passive) would predict collective personality and that collective personality would be significantly related to collective performance. The results supported these hypotheses using a sample of franchised units. On the basis of recent research at the individual level, several interactions among the various personality dimensions were hypothesized and supported. Implications are discussed.     

Monitoring psychotherapy with performance-based measures of personality functioning

In this commentary, I review a meta-analysis and three original research reports concerning the Rorschach (Exner, 2003; Rorschach, 1921/1942) and the Thematic Apperception Test (TAT; Murray, 1943) assessment in psychological treatment planning and outcome evaluation. The information in these four articles bears witness to the potential utility of performance-based personality assessment measures for this purpose. The strengths and limitations of the articles suggest several guidelines for future research designed to examine this Rorschach and TAT application including an emphasis on effectiveness studies, longitudinal data, integrated independent variables, observable dependent variables, sophisticated data analysis combining nomothetic and idiographic presentation, and the incremental contribution of performance-based measures to psychotherapy-related personality assessment.