Different types of exercise induce differential effects on neuronal adaptations and memory performance

Different exercise paradigms show differential effects on various forms of memory. We hypothesize that the differential effects of exercises on memory performance are caused by different neuroplasticity changes in relevant brain regions in response to different exercise trainings. We examined the effects of treadmill running (TR) and wheel running (WR) on the Pavlovian fear conditioning task that assesses learning and memory performance associated with the amygdala (cued conditioning) and both the amygdala and hippocampus (contextual conditioning). The skeletal muscle citrate synthase activity, an indicator of aerobic capacity, was elevated in rats received 4 w of TR, but not WR. While both TR and WR elevated the contextual conditional response, only TR facilitated the cued conditional response. Using a single-neuron labeling technique, we found that while both TR and MR enlarged the dendritic field and increased the spine density in hippocampal CA3 neurons, only TR showed these effects in basolateral amygdalar neurons. Moreover, both types of exercise upregulated synaptic proteins (i.e., TrkB and SNAP-25) in the hippocampus; however only TR showed similar effects in the amygdala. Injection of K252a, a TrkB kinase inhibitor, in the dorsal hippocampus or basolateral amygdala abolished the exercise-facilitated contextual or cued fear learning and memory performance, respectively, regardless of the types of exercise. In summary, our results supported that different types of exercise affect the performance of learning and memory via BDNF-TrkB signaling and neuroplasticity in specific brain regions. The brain region-specific neuronal adaptations are possibly induced by various levels of intensity/stress elicited by different types of exercise.     

Evaluations,Attitude Similarity,and Interpersonal Attraction: Testing the Hypothesis of Weighting Interference Across Responses

The greater effect of negative than positive stimuli on judgments—the positive-negative asymmetry (PNA)—is rather pervasive. However, the effects of the valence of evaluations of the participant by the partner and attitude similarity between them on attraction have been inconsistent with PNA. The hypothesis that the weighting rule instigated by the first response interferes with the weighting rule normally expected for the second response was tested. As hypothesized, evaluations and attitude similarity interacted when attraction response was assessed prior to competence response but not when competence response was assessed first. The effects in the first measured response fully mediated the effects in the second measured response but not vice versa. Implications of the finding for attraction and PNA are discussed.     

Imagining Disability Futurities

This article explores twelve short narrative films created by women and trans people living with disabilities and embodied differences. Produced through Project Re?Vision, these micro documentaries uncover the cultures and temporalities of bodies of difference by foregrounding themes of multiple histories: body, disability, maternal, medical, and/or scientific histories; and divergent futurities: contradictory, surprising, unpredictable, opaque, and/or generative futures. We engage with Alison Kafer's call to theorize disability futurity by wrestling with the ways in which “the future” is normatively deployed in the service of able‐bodiedness and able‐mindedness (Kafer 2013 ), a deployment used to render bodies of difference as sites of “no future” (Edelman 2004 ). By re‐storying embodied difference, the storytellers illuminate ongoing processes of remaking their bodily selves in ways that respond to the past and provide possibilities for different futures; these orientations may be configured as “dis‐topias” based not on progress, but on new pathways for living, uncovered not through evoking the familiar imaginaries of curing, eliminating, or overcoming disability, but through incorporating experiences of embodied difference into time. These temporalities gesture toward new kinds of futures, giving us glimpses of ways of cripping time, of cripping ways of being/becoming in time, and of radically re‐presencing disability in futurity.     

Intersecting Identities as a Source of Religious Incongruence

Chaves (2010) argues that much of the work in the sociology of religion is susceptible to the religious congruence fallacy—the tendency to assume consistency between religious beliefs and one's attitudes and behaviors across situations when they are in fact highly variable. We build on and extend this argument by focusing on intersecting group identities as a mechanism for identifying such incongruence, not only within religious contexts, but also at the intersection of categories such as gender and race. To illustrate this argument, the analysis draws on data from the 2006 Panel Study of American Religion and Ethnicity (PS‐ARE) to assess how race, gender, and religion interact to produce different levels of attitude and behavior incongruencies on key issues of the day, specifically conservative social values and voting behaviors. The results find marked differences and inconsistent relationships between attitudes and behaviors across racial‐gender groups. We use the analysis to highlight the conditions that result in incongruence at the intersections of identity categories and pinpoint where social scientists are most vulnerable to committing the congruence fallacy.     

Relations among early adolescents' parent-adolescent attachment, perceived social competence, and friendship quality

To assess whether the relation between attachment and friendship quality may be explained by social competence, 113 students in Grades 7 and 8 from the Baltimore metropolitan area completed self-report questionnaires on the variables of interest. In hierarchical regression analyses, both maternal Affective Quality of Attachment and the interaction of School with paternal Affective Quality of Attachment predicted social competence. Also, the interaction of School with paternal Affective Quality of Attachment predicted negative friendship features, whereas social competence predicted positive friendship features. These findings provide support for a pathway between adolescents' attachment to both parents and adolescents' perceived social competence and, in turn, their friendship quality.     

What is the source of cultural differences? -- Examining the influence of thinking style on the attribution process

The present research is intended to find out whether individuals with analytic or holistic thought have different attribution processes. Cross-cultural research has suggested that East Asians, who tend to have a holistic thought pattern, differ in cognitive process from Westerners, who tend to engage in analytic thought. However, studies that found cultural difference in attribution process may have non-equivalence problems that make it hard to interpret the causal relationship between thinking style and attribution process. The present research extends this by measuring participants’ thinking style within a single culture in order to ensure equivalence on potentially confounding variables such as prior knowledge and cognitive capacity. Two experiments demonstrate that both types of thinkers have identical attribution processes and suggest different thinking styles might relate to different tendencies toward situational information, but not to the attribution process itself.     

Antecedents of consumers' citizenship behaviour towards organic foods

Within the consumer behaviour literature, there has been little research on factors that influence customers' choices for organic foods. This study investigates three aspects of the Taiwanese organic food market. The first aspect considers how argument quality, source credibility, and social comparison affect consumer‐social venture identification. The second aspect examines how identity attractiveness, social media engagement, and self‐determination affect personal relevance. The third and final aspect investigates how consumer‐social venture identification and personal relevance influence customer citizenship behaviour. The results show that consumer‐social venture identification and personal relevance have significant and positive effects on customer citizenship behaviour. Furthermore, argument quality, source credibility, and social comparison all have significant and positive effects on consumer‐social venture identification. Finally, identity attractiveness, social media engagement, and self‐determination have significant and positive effects on personal relevance. This study makes three contributions regarding consumers' behaviour of purchasing organic foods. First, it explores whether consumer‐social venture identification and personal relevance are antecedents of customer citizenship behaviour. Second, it investigates whether argument quality, source credibility, and social comparison are antecedents of consumer‐social venture identification. Last, it examines whether identity attractiveness, social media engagement, and self‐determination are antecedents of personal relevance. The practical implications of this study indicate that firms must pay more attention to consumers' information search/sharing and perceptions of a credible environment for sharing information and their awareness about healthy items and personal images on social networking sites.     

A database for semantic, grammatical, and frequency properties of the first words acquired by Italian children.

The CFVlexvar.xls database includes imageability, frequency, and grammatical properties of the first words acquired by Italian children. For each of 519 words that are known by children 18-30 months of age (taken from Caselli & Casadio's, 1995, Italian version of the MacArthur Communicative Development Inventory), new values of imageability are provided and values for age of acquisition, child written frequency, and adult written and spoken frequency are included. In this article, correlations among the variables are discussed and the words are grouped into grammatical categories. The results show that words acquired early have imageable referents, are frequently used in the texts read and written by elementary school children, and are frequent in adult written and spoken language. Nouns are acquired earlier and are more imageable than both verbs and adjectives. The composition in grammatical categories of the child's first vocabulary reflects the composition of adult vocabulary. The full set of these norms can be downloaded from www.psychonomic.org/archive/.     

A database for semantic,grammatical, and frequency properties of the first words acquired by Italian children

The CFVlexvar.xls database includes imageability, frequency, and grammatical properties of the first words acquired by Italian children. For each of 519 words that are known by children 18–30 months of age (taken from Caselli & Casadio’s, 1995, Italian version of the MacArthur Communicative Development Inventory), new values of imageability are provided and values for age of acquisition, child written frequency, and adult written and spoken frequency are included. In this article, correlations among the variables are discussed and the words are grouped into grammatical categories. The results show that words acquired early have imageable referents, are frequently used in the texts read and written by elementary school children, and are frequent in adult written and spoken language. Nouns are acquired earlier and are more imageable than both verbs and adjectives. The composition in grammatical categories of the child’s first vocabulary reflects the composition of adult vocabulary. The full set of these norms can be downloaded fromwww.psychonomic.org/archive/.     

VERB™ Summer Scorecard: Findings from a Multi-level Community-based Physical Activity Intervention for Tweens

The benefits of physical activity for adolescents are well established. Multi-level interventions may be especially effective in establishing and sustaining health-enhancing behaviors. This study explored the influences of a multi-level community intervention aimed at increasing physical activity among tweens (youth 9–13). Two Florida school districts far apart served as intervention and comparison sites in a quasi-experimental post-test design. Youth in grades 5 through 8 in the intervention community (n = 1,253) and comparison community (n = 866) completed an anonymous post-intervention survey. An intent-to-treat analysis did not show any statistically significant group differences for the physical activity outcomes examined. However, a subset analysis revealed that students who reported participating in the intervention were more likely to be physically active than youth in the comparison group, as well as youth in the intervention community who reported not participating. Participating in the intervention was significantly related to meeting recommendations for vigorous physical activity (OR = 2.08, P = 0.0259), being physically active on weekends (OR = 1.84, P = 0.0017), and reporting more days of trying a new game or sport (OR = 1.49, P = 0.046) after controlling for grade, gender, race/ethnicity, and SES. These findings support the efficacy of multi-level interventions to create effective health behavior change, especially when linkages among community, media, schools, and the home are present.