Sex and leadership styles: a meta-analysis of research published in the 1990s

Empirical research on sex differences in leadership styles, published between 1987 and 2000 in peer-reviewed journals, is reviewed by means of a meta-analysis. The leadership styles examined are interpersonal, task-oriented, democratic versus autocratic, and transformational and transactional leadership. Analysis showed that evidence for sex differences in leadership behavior is mixed, demonstrating that women tend to use more democratic and transformational leadership styles than men do, whereas no sex differences are found on the other leadership styles. Sex differences in leadership styles are contingent upon the context in which male and female leaders work, as both the type of organization in which the leader works and the setting of the study turn out to be moderators of sex differences in leadership styles.     

Sacrifice as a predictor of marital outcomes

We investigated the prospective associations between attitudes about sacrifice and marital outcomes in 38 married couples. Specifically, a measure of satisfaction with sacrifice was proposed to be a potent longitudinal predictor of marital adjustment and distress based on existing cross-sectional studies and also to mediate the association between commitment and marital adjustment. Results demonstrated that attitudes about sacrifice discriminated between couples who would become distressed versus nondistressed over time. Sacrifice attitudes also predicted the maintenance of relationship adjustment over time even better than earlier relationship adjustment. Finally, sacrifice attitudes mediated the link between commitment and relationship adjustment for husbands, but not wives. Implications for intervention are discussed.     

The time of our lives: life span development of timing and event tracking

Life span developmental profiles were constructed for 305 participants (ages 4-95) for a battery of paced and unpaced perceptual-motor timing tasks that included synchronize-continue tapping at a wide range of target event rates. Two life span hypotheses, derived from an entrainment theory of timing and event tracking, were tested. A preferred period hypothesis predicted a monotonic slowing of a preferred rate (tempo) of event tracking across the life span. An entrainment region hypothesis predicted a quadratic profile in the range of event rates that produced effective timing across the life span; specifically, age-specific entrainment regions should be narrower in childhood and late adulthood than in midlife. Findings across tasks provide converging support for both hypotheses. Implications of these findings are discussed for understanding critical periods in development and age-related slowing of event timing.     

The effect of test schedules on the formation of linked perceptual classes

After training conditional discriminations among selected stimuli from two perceptual classes, the emergence of novel relations involving other members of both classes was assessed using cross-class probes. The cross-class probes were presented using one of four different testing schedules. In the 2/9 test, nine different probes were presented in each of two test blocks. In the 6/3 test, three different probes were presented in each of six test blocks. In the 18/1-RND test, each of the 18 cross-class probes was presented in separate test blocks. In the 2/9 and 6/3 tests, the cross-class probes were presented in a randomized order within test block. In the 18/1-RND test, the cross-class probes were presented in a randomized sequence. In the 18/1-PRGM test, however, the cross-class probes were presented in a programmed order (i.e., the values of the stimuli in each cross-class probe were changed systematically in the succession of probe presentations). About 55% of the linked perceptual classes emerged during the 2/9, 6/3, and 18/1-RND tests. Thus the number of different probes in a test block did not influence the emergence of classes as long as the probes were presented in a random order. Virtually all classes emerged during the 18/1-PRGM test. Thus at least one ordered introduction of different cross probes resulted in the reliable emergence of linked perceptual classes. Mechanisms responsible for linked perceptual class formation are discussed along with the relation of these classes to other complex categories.     

Brain oscillation recordings of the audience in a live concert-like setting

Cognitive Processing - There are only a few previous EEG studies that were conducted while the audience is listening to live music. However, in laboratory settings using music recordings, EEG...     

Rewriting Aquinas’ animal ethics: the primacy of reason in the determination of moral status

Arguing in support of Aristotle, Aquinas conceptualised the cognitive functioning of the human as exceeding that of other animals. In its base form, the Thomistic position asserts that the intellective functioning of the human animal is superior to the instinctual operation of the non-human animal. For Aquinas, it is the intellect that determines the enactment of the human will. Thus, if a non-human animal is devoid of intellect, no willing of any action is possible. Consequently, an action of a non-human animal which is humanly perceived as immoral, is in fact morally agnostic because the animal lacks the reasoning capacity to judge the potential action's moral status. Given that Aquinas’ argument centres on the role of reason in determinations of moral status, we seek to determine the status theoria of the Thomistic moral theory in light of contemporary studies into animal cognition. The assertion is made that this particular aspect of Aquinas’ moral theory requires rewriting because reason is evident in animal cognition to a greater extent than Aquinas would have been able to appreciate given his contextual limitations. This presence of reason, we argue, ascribes moral status to some non-human animals, analogous to their human counterparts. However, we will also contend that rather than dismissing Aquinas’ reason-founded ethics, value could be found in retaining a rewritten Thomistic theoretical construction which extends Aquinas’ ethic to include animals apart from the human that are bearers of the faculty of reason.     

The stability of structural measures derived from repertory grids

Although the use of repertory grids in psychological research has proliferated, studies of their psychometric properties are relatively rare. For this reason, we studied the reliability and convergence of several measures of cognitive structure derived from grids, including intensity, percentage of variance accounted for by the first component, cognitive complexity, ordination, extremity of ratings, self-ideal discrepancy, and self-other discrepancy, as well two measures of rating stability, construct consistency and factor loading consistency. Eighty-two Spanish (Catalan) and American participants completed small and large grids on each of four occasions, which enabled exploratory analyses of the impact of grid size and subject characteristics on the structural scores obtained. Results indicated that the majority of scores showed impressive test-relest reliability (modal r = .85 for periods up to 1 month), but also suggested a gradual tightening effect across subsequent administrations. In general, scores intercorrelated in theoretically anticipated ways, converging on the assessment of cognitive differentiation and discrimination of elements within construct dimensions. The results have implications for the reactivity of structural scores to variations in grid format, as well as for use of grids in the study of sex differences and cross-cultural comparisons.     

Guidelines with Strategies for Enhancement of Resilience and Psycho-Social Well-Being in Professional Nurses

There are currently no guidelines available for enhancement of resilience in professional nurses. This study aims to provide broad guidelines with specific strategies that may enhance resilience and psycho-social well-being in professional nurses. These guidelines are based findings from previous qualitative research on resilience in professional nurses in the public and private sector in South Africa. We used Kumpfer's (1999) theoretical model of resilience to frame the guidelines. Resilience among professional nurses appears to vary in manifestation across settings of practice.     

Psychometric evaluation of the Basic Traits Inventory in the multilingual South African environment

The objective of this study was to evaluate the psychometric properties of the BTI for all the official language groups in South Africa. Item bias analysis was performed by means of Rasch analysis for a sample of 105 342 respondents with representation of each of the 11 language groups. Reliability values were good for all the language groups and bias was revealed in only 12 of the 193 items (6.2%) through item response modelling. Based on these results, the BTI may be an appropriate measure of personality for all the different language groups in South Africa.