The core of expertise

I reply to my critics in respect of my work on expertise. I define the 'core' of the multidisciplinary 'expertise studies'. I argue that those who have taken the work seriously could resolve their problems by paying more attention to the core. Each could have made good use of an aspect of the core.     

Age-independent effects of pubertal status on behavioral constraint in healthy adolescents

Studies have examined age-related changes in personality traits from adolescence through young adulthood, finding that aspects of negative emotionality decrease while conscientiousness increases over time. Varied mechanisms may underlie these transitions, including puberty-driven hormonal changes. Here, healthy adolescents completed the Multidimensional Personality Questionnaire-Brief Form and self-report measures of pubertal status at baseline and after two years. Independent of age, pubertal status impacted primary trait scales of the MPQ-BF Constraint factor in a sex-specific manner. Females decreased in Constraint, and particularly Control, while males increased in Constraint, and particularly Harm Avoidance, with advancing puberty. Longitudinal analyses validated these findings for Control. Findings are discussed relative to males’ versus females’ achievement of optimal levels of behavioral control in adolescence.     

Developmental and dyadic perspectives on commitment in adult romantic relationships

We tested hypotheses concerning the developmental roots of becoming the "weak-link" (less committed) partner in adult romantic relationships and the associations between partners' absolute and relative levels of commitment and dyadic outcomes. We examined 78 target 20- to 21-year-olds who were involved in a romantic relationship and who had been studied since birth. As predicted, people who received lower-quality support from caregivers in toddlerhood or who were less able to resolve conflicts with a best friend in midadolescence were more likely to become the weak-link partner in a romantic relationship at age 20 to 21. Furthermore, lower commitment on the part of the weak-link partner coupled with greater discrepancy in commitment between partners predicted a greater likelihood that the couple would display hostility (rated by observers) during a videotaped conflict-resolution task when they were 20 to 21 years old. These findings are discussed from developmental and dyadic perspectives.     

The Impact of Early Interpersonal Experience on Adult Romantic Relationship Functioning: Recent Findings from the Minnesota Longitudinal Study of Risk and Adaptation

Adopting an organizational view on social development, we have investigated how interpersonal experiences early in life prospectively predict how well individuals resolve relationship conflicts, recover from conflicts, and have stable, satisfying relationships with their romantic partners in early adulthood. We have also identified specific intervening interpersonal experiences during middle childhood and adolescence that mediate the connection between how individuals regulated their emotions with their parents very early in life and as young adults in their romantic relationships. We discuss the many advantages of adopting an organizational view on social development.     

Applying a Time‐Patterned Typology of Homelessness Among Individuals with Mental Illness

Identification of subgroups of the homeless populations, or typologies, has been an important research priority to guide homelessness services and policies. This study builds on previous typological research conducted in the general homeless population by focusing on individuals with mental illness to further delineate typologies within a more homogenous subset of the homeless population. A time‐patterned typology based on episodes of street and shelter homelessness over a four‐year period was applied to a sample of 246 individuals identified through mental health administrative records. Four groups were created based upon patterns of homelessness: 26.8% experienced homelessness for 4 years, 13.4% had one episode of homelessness but were no longer homeless at the end of the follow‐up, 48.4% had at least two episodes of homelessness, and 11.4% had a single episode of homelessness lasting 3 months or less. Findings from a multinomial logistic regression indicated that gender, presence of a psychotic disorder, substance abuse, and year of study enrollment significantly predicted group membership. Residential trajectories upon exit from homelessness and at the end of the four‐year follow‐up were examined. Implications for current policy and future research are discussed.     

Developmental changes in dopamine neurotransmission in adolescence: Behavioral implications and issues in assessment

Adolescence is characterized by increased risk-taking, novelty-seeking, and locomotor activity, all of which suggest a heightened appetitive drive. The neurotransmitter dopamine is typically associated with behavioral activation and heightened forms of appetitive behavior in mammalian species, and this pattern of activation has been described in terms of a neurobehavioral system that underlies incentive-motivated behavior. Adolescence may be a time of elevated activity within this system. This review provides a summary of changes within cortical and subcortical dopaminergic systems that may account for changes in cognition and affect that characterize adolescent behavior. Because there is a dearth of information regarding neurochemical changes in human adolescents, models for assessing links between neurochemical activity and behavior in human adolescents will be described using molecular genetic techniques. Furthermore, we will suggest how these techniques can be combined with other methods such as pharmacology to measure the impact of dopamine activity on behavior and how this relation changes through the lifespan.     

Risk and resilience: Dual effects of perceptions of group disadvantage among Latinos

Several decades of research on the psychology of minority status has yielded highly discrepant findings. Substantial research suggests that perceptions of discrimination are linked to inferior self-regard and poor mental health, whereas other studies indicate that perceptions of discrimination are protective of global self-esteem. We tested a theoretical model of the combined (negative/positive) effects of perceived group disadvantage on self-esteem among Latinos. Structural equation modeling analyses indicated that perceptions of group disadvantage were indirectly related to self-esteem through two principal pathways. The total (direct and indirect) effect on self-esteem was not significant, suggesting that, among Latinos, the deleterious consequences of perceived belonging to a devalued and disadvantaged group were fully counterbalanced by the positive effects of intervening variables. More complex models may be needed to characterize fully the self-protective and detrimental consequences of perceived group disadvantage among Latinos.     

Gender Voices in Hong Kong English Textbooks—Some Past and Current Practices

This paper seeks to investigate whether recent improvements in the status of women in Hong Kong are reflected in patterns of gender representation in Hong Kong secondary English textbooks. A comparison of ten recently published books which are currently in use with ten published in the late 1980s/early 1990s and no longer in use revealed that women appeared more frequently in the former, and that greater use was made of gender-inclusive pronouns and the neutral address title Ms. Nevertheless some writers, it was found, continue to perpetuate the stereotyped image of women as weaker than men, and as operating primarily within domestic rather than social domains. The “male-first” phenomenon and the visual under-representation of women are still prevalent in recent textbooks.