Children of parents with unipolar depression: A controlled 1-year follow-up

An earlier cross-sectional study indicated that children's health and adjustment is at risk when their parents are depressed. Here, we report the associated longitudinal changes in children and families when parental depression either remits or continues. Comparisons are made among three groups established at a 1-year follow-up: previously depressed parents whose symptoms have remitted (N = 34 remitted parents), previously depressed parents who continue to be depressed (N = 23 nonremitted parents), and sociodemographically matched control families (N = 95). Although remitted parents and their family social environments improved, their children were still functioning more poorly than children of controls. Both the children and the families of nonremitted parents continued to function more poorly than controls. A social-environmental framework indicates that parents' functioning as well as family stressors and resources are concurrently and predictively linked to children's health.     

Effects of sex-role deviant lifestyles in otherwise normal persons on the perception of maladjustment

Subjects rated 12 stimulus persons (SPs) on maladjustment in several areas, and on the likelihood of requiring psychiatric help, in a person perception task. Half of the SPs were male and half female. Half of each were sex-role congruent and half sex-role deviant in terms of occupation, life styles, or interests, though normal in all other respects. Bias scores were constructed for subjects reflecting the extent to which each was influenced by sex-role deviance. Measures of gender stereotyping and sex-role ideology were also obtained. Results showed that sex-role deviant SPs were rated as significantly more maladjusted than congruent SPs and more likely to require psychiatric help. Sex-role deviance had a much greater effect on male than female SPs. Gender stereotyping and sex-role ideology showed only a moderate relationship, which suggests that these concepts should be distinguished. Measures of evaluative bias showed low to moderate relationships with sex-role ideology and very low correlations with gender stereotyping.This research is based on parts of a doctoral dissertation by the first author. It was supported by an Ontario Mental Health Foundation Research Studentship Award to the first author and by Canada Council Grant #S74-0707 to the second author.     

NT-3 facilitates hippocampal plasticity and learning and memory by regulating neurogenesis

In the adult brain, the expression of NT-3 is largely confined to the hippocampal dentate gyrus (DG), an area exhibiting significant neurogenesis. Using a conditional mutant line in which the NT-3 gene is deleted in the brain, we investigated the role of NT-3 in adult neurogenesis, hippocampal plasticity, and memory. Bromodeoxyuridine (BrdU)-labeling experiments demonstrated that differentiation, rather than proliferation, of the neuronal precursor cells (NPCs) was significantly impaired in DG lacking NT-3. Triple labeling for BrdU, the neuronal marker NeuN, and the glial marker GFAP indicated that NT-3 affects the number of newly differentiated neurons, but not glia, in DG. Field recordings revealed a selective impairment in long-term potentiation (LTP) in the lateral, but not medial perforant path-granule neuron synapses. In parallel, the NT-3 mutant mice exhibited deficits in spatial memory tasks. In addition to identifying a novel role for NT-3 in adult NPC differentiation in vivo, our study provides a potential link between neurogenesis, dentate LTP, and spatial memory.     

Memory self-efficacy predicts memory performance: results from a 6-year follow-up study

The purpose of this study was to examine the relationship between memory self-efficacy (MSE) and a 6-year follow-up assessment of memory functioning in a sample of Dutch older adults. MSE was assessed by a Dutch abridged version of the Metamemory in Adulthood questionnaire (MIA; R. A. Dixon, D. F. Hultsch, & C. Hertzog, 1988; C. Hertzog, D. F. Hultsch, & R. A. Dixon, 1989; R. W. H. M. Ponds & J. Jolles, 1996). The total MSE score predicted memory performance at 6 years, as measured by the Visual Verbal Learning Task (VVLT; N. Brand & J. Jolles, 1985). A separate analysis of the different MSE subscales indicated that the MIA Change score was the most salient domain-specific MSE predictor of subsequent memory performance after 6 years. An extreme groups analysis of the MIA Change score revealed a pattern of performance for those who perceived that their memory was worsening, performing less well on the 3 trials of the VVLT when these were readministered at the 6-year follow-up.     

Innovation across cultures: Connecting leadership,identification, and creative behavior in organizations

Innovation is considered essential for today's organizations to survive and thrive. Researchers have also stressed the importance of leadership as a driver of followers' innovative work behavior (FIB). Yet, despite a large amount of research, three areas remain understudied: (a) The relative importance of different forms of leadership for FIB; (b) the mechanisms through which leadership impacts FIB; and (c) the degree to which relationships between leadership and FIB are generalizable across cultures. To address these lacunae, we propose an integrated model connecting four types of positive leadership behaviors, two types of identification (as mediating variables), and FIB. We tested our model in a global data set comprising responses of N = 7,225 participants from 23 countries, grouped into nine cultural clusters. Our results indicate that perceived LMX quality was the strongest relative predictor of FIB. Furthermore, the relationships between both perceived LMX quality and identity leadership with FIB were mediated by social identification. The indirect effect of LMX on FIB via social identification was stable across clusters, whereas the indirect effects of the other forms of leadership on FIB via social identification were stronger in countries high versus low on collectivism. Power distance did not influence the relations.     

Sensitization and aversive conditioning: Effects on the startle reflex and electrodermal responding

Animal data suggest that shock sensitization as well as aversive learning potentiates the acoustic startle reflex. The present experiment tested, whether this shock sensitization also occurs in human subjects and whether it precedes aversive conditioning. Sixty subjects viewed—prior to conditioning—a series of slides of different emotional contents including the to be conditioned stimuli (CSs). Afterwards, the experimenter attached the shock electrodes and initiated shock exposure. Then, subjects were randomly assigned to view a series of two slides, each for eight acquisition trials in which one slide was followed by a shock. Subsequently, extinction trials (12 for each slide) were administered. During preconditioning, acquisition, and extinction, startle probes occurred unpredictably during and between slide viewing. Preconditioning data replicated previous results by Lang and his associates, showing that the startle response magnitude is directly related to the affective valence induced by the slides. Shock exposure strongly facilitated the startle reflex magnitude. This shock sensitization was absent for the skin conductance response. Course of learning also varied for both response systems. The data suggest that startle reflex potentiation indexes the acquisition of an avoidance disposition, which is preceded by a general sensitization of the protective reflexes. Skin conductance learning follows arousal changes and is modulated by cognitive processes.     

Assessing the Flexibility of Managers: A comparison of methods1

Despite keen interest, questions remain about defining and measuring the behavioral flexibility of managers. This paper reports a conceptual and empirical comparison of three alternative methods of assessing this construct. Results suggest that the way managerial flexibility is typically assessed in practice – as a trait‐like characteristic with coworker ratings that describe a general tendency to vary behavior across situations – is deficient. However, more complex models that represent flexibility as a higher‐order construct reflecting mastery of specific and opposing behaviors in both the social/interpersonal domain and the functional/organizational domain show promise. They demonstrate construct validity evidence, predict as much as 42% of the variance in overall effectiveness, and provide more specific diagnostic information to guide behavior change.     

Untersuchungen zur Lehre von der Gestalt

Ohne Zusammenfassung