The current meta-analysis investigated the extent to which personality traits changed as a result of intervention, with the primary focus on clinical interventions. We identified 207 studies that had tracked changes in measures of personality traits during interventions, including true experiments and prepost change designs. Interventions were associated with marked changes in personality trait measures over an average time of 24 weeks (e.g., d = .37). Additional analyses showed that the increases replicated across experimental and nonexperimental designs, for nonclinical interventions, and persisted in longitudinal follow-ups of samples beyond the course of intervention. Emotional stability was the primary trait domain showing changes as a result of therapy, followed by extraversion. The type of therapy employed was not strongly associated with the amount of change in personality traits. Patients presenting with anxiety disorders changed the most, and patients being treated for substance use changed the least. The relevance of the results for theory and social policy are discussed. (PsycINFO Database Record

Conscientiousness is a personality construct that is a core determinant of health, positive aging, and human capital. A large body of work has contributed to our understanding of this important aspect of personality, but there are multiple conceptual and methodological issues that complicate our understanding of conscientiousness. Toward this end, we review (a) the conceptual standing of conscientiousness as a personality trait, (b) past research focusing on the underlying dimensions of conscientiousness, (c) the nomological network in which conscientiousness is embedded, and (d) the diverse methods that have been used to assess dimensions of conscientiousness. We conclude with recommendations for improving our understanding of the construct of conscientiousness, methods of assessment, and etiological underpinnings of conscientiousness. We believe this article can serve an important role in the larger goal of better understanding conscientiousness and its core role in the health of our society.

Having a purpose in life has been nominated consistently as an indicator of healthy aging for several reasons including its potential for reducing mortality risk. The current study sought to extend these findings by examining whether purpose promotes longevity across the adult years, using data from the longitudinal MIDUS sample (mean age = 46.92 years, SD = 12.94). Proportional hazard models demonstrated that purposeful individuals lived longer than their counterparts during the 14 years after assessment, even when controlling for other markers of psychological and affective well-being. Moreover, these longevity benefits do not appear to be conditional on either the participants’ age, how long they lived, or whether they had retired from the workforce. In other words, having a purpose appears to widely buffer against mortality risk across the adult years.

In an ongoing effort to identify predictors of educational success and achievement, grit has emerged as a seemingly useful disposition. Grit is conceived as the combination of perseverance of effort and consistency of interest over time, but the predictive utility of these two dimensions has rarely been explored separately, and the limited research available has considered a small number of outcomes. This article draws upon three samples at two universities to examine the relationships between grit dimensions and various student outcomes. Multiple regression results indicated that perseverance of effort predicted greater academic adjustment, college grade point average, college satisfaction, sense of belonging, faculty–student interactions, and intent to persist, while it was inversely related to intent to change majors. Consistency of interest was associated with less intent to change majors and careers, but it was not significantly associated with any other outcome in the expected direction when controlling for other variables.

The Conscientiousness (C) of the self and significant others influences health by way of mediational chains involving socioeconomic attainment, the avoidance and neutralization of stressors, the promotion of health behaviors and the minimization of risk behaviors, and the management of symptoms and diseases. Yet, meta-analyses reveal that these associations are moderated by factors that are not well understood. We propose the Life Course of Personality Model (LCP Model), which comprises a series of hypotheses that suggest how such mediational chains are subject to 2 sources of contingency. First, the mechanisms by which C translates into health and the avoidance of risk change from early childhood to late adulthood, involving processes that are specific to phases of the life course; also, however, C influences health by way of continuous processes extending over many decades of life. Second, C may be more consequential in some social contexts than in others, and when accompanied by some constellations of personality characteristics than by others. That is, the mediational processes by which C translates into health and the avoidance of disease are likely moderated by timing, social context (including the C of others), and other aspects of the individual's personality. We consider methodological implications of the LCP Model.

The present study investigated whether an intervention aimed to increase cognitive ability in older adults also changes the personality trait of openness to experience. Older adults completed a 16-week program in inductive reasoning training supplemented by weekly crossword and Sudoku puzzles. Changes in openness to experience were modeled across four assessments over 30 weeks using latent growth curve models. Results indicate that participants in the intervention condition increased in the trait of openness compared to a waitlist control group. The study is one of the first to demonstrate that personality traits can change through non-psychopharmocological interventions.

Having a sense of purpose has been discussed as a developmental asset for youth and as an outgrowth of establishing a sense of identity. Using the identity capital model as a theoretical framework, 3 studies examined purpose as a mediator in the relationship between identity and well-being among adolescents and emerging adults. In Study 1A, (n = 110), purpose commitment was positively associated with positive affect, hope, happiness among adolescents, and fully mediated associations between identity commitment and these indices of well-being. These findings were replicated in Study 1B (n = 398), with a sample of emerging adults and using different measures of well-being. In Study 2, multilevel random coefficient modeling analyses examined the role of identity and purpose in the daily lives of adolescents (n = 135). Results showed that purpose commitment fully mediated the relationship between identity and changes in daily positive and negative affect. Overall, findings suggest that cultivating a sense of purpose in life may be an important mechanism through which a stable identity contributes to well-being.

While having a purpose in life has been theorized as a developmental asset, the extent to which adolescents cultivate a meaningful sense of direction is not well understood. In the present study, cluster analysis was used to classify adolescents by levels of purpose exploration and commitment. The sample (N = 318; 55% female) consisted of youth aged 14-18 and was predominantly White/non-Hispanic (76.3%). Results supported four meaningful yet distinguishable profiles of youth purpose that are largely consistent with theories on identity formation: Achieved, Foreclosed, Uncommitted, and Diffused. Hypothesized linkages with affect and hope were established across the profiles such that positive emotions and goal-directed thinking were most apparent among Achieved and Foreclosed youth and least apparent among Diffused and Uncommitted youth. Overall, findings demonstrate the inherent complexity in adolescents' engagement with purpose and suggest a correspondence between stronger commitments to purpose and youths' sense of personal agency and well-being.