I'm outgoing and she's reserved: the reciprocal dynamics of personality in close friendships in young adulthood

Close college-age friendships provide differential opportunities for reinforcing dispositional tendencies and fostering accommodation or change. This finding was obtained from a cross-sectional study of 66 pairs of same-sex college-age friends (58% female). Each pair of friends was extreme and either very similar or different with regard to extraversion-introversion. Interviews with each friend were analyzed for references to each other's role in various friendship domains, including the setting of the friendship and position with regard to chatting, disclosing, expressing opinions about peers, and energizing the friendship. Matched friends mutually reinforced each other's similar dispositional tendencies. Friends with contrasting personalities showed patterns of personality accommodation as well as complementary reinforcement. Implications are discussed for embedding reciprocal theories of personality development in close friendships.     

Perceptual load alters visual excitability

Increasing perceptual load reduces the processing of visual stimuli outside the focus of attention, but the mechanism underlying these effects remains unclear. Here we tested an account attributing the effects of perceptual load to modulations of visual cortex excitability. In contrast to stimulus competition accounts, which propose that load should affect simultaneous, but not sequential, stimulus presentations, the visual excitability account makes the novel prediction that load should affect detection sensitivity for both simultaneous and sequential presentations. Participants fixated a stimulus stream, responding to targets defined by either a color (low load) or color and orientation conjunctions (high load). Additionally, detection sensitivity was measured for a peripheral critical stimulus (CS) presented occasionally. Increasing load at fixation reduced sensitivity to the peripheral CSs; this effect was similar regardless of whether CSs were presented simultaneously with central stimuli or during the (otherwise empty) interval between them. Controls ruled out explanations of the results in terms of strategic task prioritization. These findings support a cortical excitability account for perceptual load, challenging stimulus competition accounts.     

Introduction to Stephen G. West's Murray Award Address

I am honored to introduce Stephen G. West, the winner of the Henry A. Murray Award for Outstanding Contributions to Personology and the Study of Human Lives. Steve's contributions as a methodologist and statistician are appreciated by anyone who has struggled with complex interactions and unusual research designs. These empirical innovations have contributed enormously to broadening and deepening the kinds of data that can be used to study personality. Perhaps less apparent, but crucial in his selection for this award, is Steve's leadership in diversifying the field of personality psychology. In his capacity as editor of the Journal of Personality in the 1980s and early 1990s, Steve effectively shepherded personology into the mainstream of personality research. Also important was Steve's willingness not only to mentor his own graduate students, but to rescue a considerable number of strays. In his generativity and inclusiveness, Steve has effectively elevated the field of personality and the persons within it.     

Gendered Reminiscence Practices and Self-Definition in Late Adolescence

The purpose of this study was to examine gender differences in the emotional construction of life-threatening events (LTEs) that were chosen as self-defining by late adolescents. European American college students (41 women, 25 men) whose average age was 19 were selected from a larger sample (n = 139) because they reported at least 1 LTE among 3 self-defining memories. Memory narratives were elicited with a questionnaire (Singer & Moffitt, 1991–1992) and coded for emotional position. As expected, tough, action-packed positions were more prevalent in men's narratives, and compassionate positions were more prevalent in women's narratives. Unexpectedly, narratives that emphasized one's own vulnerability (fear or sadness) were equally prevalent for men and women, and women's emotional discourse was more conditional upon type of event, i.e., deaths vs. assaults. Findings provide the most explicit evidence to date that some gendered reminiscence practices found in prior studies of children are reflected in late adolescents' self-defining reminiscences. Implications are also discussed for a more situated understanding of gendered reminiscence pratices and for theories of identity development.     

Categorizing sounds by pitch: effects of stimulus similarity and response repetition

Two experiments were performed to determine whether categorization of the pitch of a probe tone is influenced by the pitch of, and response made to, a preceding prime tone. The prime and the probe could be drawn either from a pool of low-frequency sounds or from a pool of high-frequency sounds. The results of both experiments indicated that the performance obtained was best when the prime and the probe were the same pitch (and therefore required the same response), intermediate when the two sounds differed in pitch and required different responses, and slowest when the prime and the probe differed in pitch but required the same response (i.e., they were drawn from the same frequency pool). The results of Experiment 2 revealed in addition that when a repeated response was required, performance declined as the magnitude of the frequency change increased and that responses were made more quickly and accurately if the direction of the frequency change was away from the alternative category than if it was toward the alternative category. The results demonstrate that categorization of sounds by pitch is accomplished with reference to a previous processing episode.     

The Myers-Briggs type indicator and coronary heart disease

Researchers have for many years attempted to establish a relationship between coronary heart disease (CHD) and personality type. In our study, 103 subjects completed Form G of the Myers-Briggs Type Indicator (MBTI). Comparisons were made between 93 CHD patients and an age-appropriate control group (Group C) on each of the four MBTI dimensions: Extraversion-Introversion, Sensing-Intuition, Thinking-Feeling, and Judging-Perceiving. The comparison between CHD patients and Group C showed that CHD patients were significantly more likely to prefer sensing and feeling.     

Perception of texture by vision and touch: multidimensionality and intersensory integration

A series of six experiments offers converging evidence that there is no fixed dominance hierarchy for the perception of textured patterns, and in doing so, highlights the importance of recognizing the multidimensionality of texture perception. The relative bias between vision and touch was reversed or considerably altered using both discrepancy and nondiscrepancy paradigms. This shift was achieved merely by directing observers to judge different dimensions of the same textured surface. Experiments 1, 4, and 5 showed relatively strong emphasis on visual as opposed to tactual cues regarding the spatial density of raised dot patterns. In contrast, Experiments 2, 3, and 6 demonstrated considerably greater emphasis on the tactual as opposed to visual cues when observers were instructed to judge the roughness of the same surfaces. The results of the experiments were discussed in terms of a modality appropriateness interpretation of intersensory bias. A weighted averaging model appeared to describe the nature of the intersensory integration process for both spatial density and roughness perception.     

The effects of progressive sleep loss on a lexical decision task: Response lapses and response accuracy

A lexical decision task was used in a paradigm testing the effects of sleep loss and fatigue on performance during a 72-h period of sleep deprivation. The data were partitioned into categories of response lapses, response accuracy, and the signal detection measures of discriminability (d’) and bias (β). Response lapses increased as a function of sleep loss and were fitted best by a composite equation with a major linear component and a minor rhythmic component. Response accuracy decreased as a function of sleep loss, with the rate of decrease being greater for nonwords than for words. Although d’ was higher for right visual field (RVF), it decreased for both fields almost linearly as a function of sleep deprivation. The rate of decrease for RVF stimulation was greater than for left visual field (LVF) stimulation, β did not change monotonically as a function of sleep loss, but showed strong circadian rhythmicity, indicating that it was not differentially affected by sleep loss per se.