Genetic differences in response to novelty and spatial memory using a two-trial recognition task in mice

A two-trial memory task, based on a free-choice exploration paradigm in a Y-maze, was previously developed to study recognition processes in Sprague-Dawley rats. Because this paradigm avoids the use of electric shock or deprivation that may have nonspecific effects and does not require learning of a rule, it may be particularly useful for studying memory in mice. Four inbred strains (Balb/cByJ, DBA/2J, C57BL/6J, and SJL/J), an F1 hybrid (C57BL/6 x SJL/J), and one outbred strain (CD1) were used to validate this task in mice and to characterize a strain distribution in response to novelty and working memory. Exploration was measured with a short (2 min) intertrial interval (ITI) between acquisition and retrieval, while memory was examined with longer intervals (30 min, 1 h, and 2 h). A study of the time course of the response to novelty revealed varying degrees of preference and/or habituation to novelty among the different strains, with CD1 exhibiting a very high response to novelty and others showing lower (C57 x SJL hybrids) to complete absence (SJL) of exploration of novelty. Memory span, assessed with increasing ITIs, varied widely among strains from 30 min (C57 x SJL hybrids) to at least 2 h (C57 and BALB). Such demonstrated sensitivity to a wide range of behavioral phenotypes supports the use of this spatial memory task as an effective tool for the study of genetic influences on the response to novelty and recognition processes in mice.     

Does the Chinese construct of guan export to the West?

This study reverses the usual process of assessing universality by examining whether a construct originating in non‐western cultures has functional relevance in the West. The construct of guan or “training” was proposed by Chao (1994) as reflecting important Chinese parenting practices also shared by other Confucian cultures. She proposed that this construct is more relevant to the understanding of outcomes among Asian‐American youth than constructs that have been developed in the West, such as “authoritative” parenting. The association among the behaviours incorporated in this construct and other “universal” parenting styles such as parental warmth has not been previously reported. Nor has there been a previous report of the prevalence and perceived desirability of guan behaviours from Western individuals. Participants in the present study were US (N = 118), Hong Kong (N = 171) and Pakistani (N = 98) nursing students. In all three cultures, guan items had adequate internal consistency (Cronbach's alphas ranging from .69 to .76), associated positively with parental warmth (Pearsons' r ranging from .37 to .52), and were seen as attributes of ideal parents. Mothers in all three cultures were perceived as showing more guan than fathers show. The associations between parental guan and the outcomes of perceived health, relationship harmony and life satisfaction were significant for the Asian participants. Tests of guan's functional relevance in the West had equivocal results with weak associations to positive outcomes in the West compared to Asia. However, the differences between cultures did not reach statistical significance. When the cultures were merged, parental training perceptions predicted a significant proportion of the variance in outcomes. Mothers' guan predicted self‐esteem in their children, whereas fathers' guan predicted life satisfaction. Although guan may have emerged from a Chinese cultural context, it appears to function similarly in many cultural systems, and may represent the Asian face of authoritative parenting.     

A Defining Presidential Moment: 9/11 and the Rally Effect

Public approval ratings of George W. Bush surged after the 11 September 2001 terrorist attacks. This study used a quasi–experimental, within–respondents design to investigate the relative contribution of five factors to this classic rally effect: the stimulus event itself, Bush's speech that evening, media exposure, partisan support, and gender effects. Respondents were pretested on the morning of the attacks; one group was posttested immediately after the speech, another group 41 hours later. Stability of effects was examined through an additional study of Bush's 20 September 2001 speech to a joint session of Congress. The findings indicate that Bush's 11 September speech was the critical factor in this rally effect; none of the other factors contributed significantly.     

MAKING COMMITMENTS, CREATING LIVES

This study examined the midlife personality implications of different long-term patterns of commitment to work¹ and family in a sample of educated women. Women with different work commitment patterns differed on both observer and self-report of instrumentality, and on observer report of interpersonal orientation and valuation of social norms. Women with different family-role commitment patterns differed only on self-report of valuation of social norms. Multivariate analyses also indicated that interpersonal orientation and instrumentality may not represent bipolar ends of the same personality continuum, and that interpersonal orientation as a broad personality domain may be comprised of distinct qualities (i.e., warmth vs. dependence). Taken together, these findings imply that when variations in the nature of women's work and family commitments are taken into account, a more comprehensive understanding of the similarities and differences in their personalities can result.     

Space flight: III. Isolation of perceptual variable in parabola flight sickness with countermeasure to lower gastric pH

Two factors of space sickness are discussed, one perceptual and the other physiological. Data from 2 adults on KC-135 airplane parabolic flights.