Variations of Gender–math Stereotype Content Affect Women’s Vulnerability to Stereotype Threat

To determine whether variations in stereotype content salience moderates stereotype threat effects, 66 US female undergraduate students were given a standardized math exam, and the salience of specific gender–math stereotype content was manipulated before the exam. Women exerted more effort on each problem and performed better on a math exam when threatened with an effort-based stereotype compared to when threatened with the ability-based stereotype or control (where no stereotype was explicitly mentioned). Implications of these results are discussed in terms of stereotype and social identity threat theory, as well as how the socio-cultural salience of ability versus other components of the gender–math stereotype may impact women who pursue math and science-based domains.     

Theoretical implications of quantitative properties of interval timing and probability estimation in mouse and rat

Although theoretical discussions typically assume that positive and negative reinforcement differ, the literature contains little unambiguous evidence that they produce differential behavioral effects. To test whether the two types of consequences control behavior differently, we pitted money‐gain positive reinforcement and money‐loss‐avoidance negative reinforcement, scheduled through identically programmed variable‐cycle schedules, against each other in concurrent schedules. Contingencies of response‐produced feedback, normally different in positive and negative reinforcement, were made symmetrical. Steeper matching slopes were produced compared to a baseline consisting of all positive reinforcement. This free‐operant differential outcomes effect supports the notion that that stimulus‐presentation positive reinforcement and stimulus‐elimination negative reinforcement are functionally “different.” However, a control experiment showed that the feedback asymmetry of more traditional positive and negative reinforcement schedules also is sufficient to create a “difference” when the type of consequence is held constant. We offer these findings as a small step in meeting the very large challenge of moving negative reinforcement theory beyond decades of relative quiescence.     

Successful Aging Across Adulthood: Hassles,Uplifts, and Self-Assessed Health in Daily Context

To examine the ways in which age, sex, daily uplifts, and daily hassles influence fluctuations in self-assessed health (SAH). A 14-day experience sampling study was conducted among community-dwelling adults (N?=?87). The distribution-free method of generalized estimating equations was used to examine whether changes in the intensity of daily hassles and changes in intensities of daily uplifts predicted subsequent changes in SAH. Both hassles and uplifts influenced SAH, although neither age nor sex influenced these associations. Findings are discussed in terms of the benefits of examining the daily context as an influence on successful aging.     

Behavioral analysis of NR2C knockout mouse reveals deficit in acquisition of conditioned fear and working memory

N-methyl-D-aspartate (NMDA) receptors play an important role in excitatory neurotransmission and mediate synaptic plasticity associated with learning and memory. NMDA receptors are composed of two NR1 and two NR2 subunits and the identity of the NR2 subunit confers unique electrophysiologic and pharmacologic properties to the receptor. The precise role of NR2C-containing receptors in vivo is poorly understood. We have performed a battery of behavioral tests on NR2C knockout/nβ-galactosidase knock-in mice and found no difference in spontaneous activity, basal anxiety, forced-swim immobility, novel object recognition, pain sensitivity and reference memory in comparison to wildtype counterparts. However, NR2C knockout mice were found to exhibit deficits in fear acquisition and working memory compared to wildtype mice. Deficit in fear acquisition correlated with lack of fear conditioning-induced plasticity at the thalamo-amygdala synapse. These findings suggest a unique role of NR2C-containing receptors in associative and executive learning representing a novel therapeutic target for deficits in cognition.     

Peers increase adolescent risk taking by enhancing activity in the brain's reward circuitry

The presence of peers increases risk taking among adolescents but not adults. We posited that the presence of peers may promote adolescent risk taking by sensitizing brain regions associated with the anticipation of potential rewards. Using fMRI, we measured brain activity in adolescents, young adults, and adults as they made decisions in a simulated driving task. Participants completed one task block while alone, and one block while their performance was observed by peers in an adjacent room. During peer observation blocks, adolescents selectively demonstrated greater activation in reward-related brain regions, including the ventral striatum and orbitofrontal cortex, and activity in these regions predicted subsequent risk taking. Brain areas associated with cognitive control were less strongly recruited by adolescents than adults, but activity in the cognitive control system did not vary with social context. Results suggest that the presence of peers increases adolescent risk taking by heightening sensitivity to the potential reward value of risky decisions.     

Computerized assessment of syntactic complexity in Alzheimer’s disease: a case study of Iris Murdoch’s writing

Currently, the majority of investigations of linguistic manifestations of neurodegenerative disorders such as Alzheimer’s disease are conducted based on manual linguistic analysis. Grammatical complexity is one of the language use characteristics sensitive to the effects of Alzheimer’s disease and is difficult to operationalize and measure using manual approaches. In the current study, we demonstrate the application of computational linguistic methods to automate the analysis of grammatical complexity. We implemented the Computerized Linguistic Analysis System (CLAS) based on the Stanford syntactic parser (Klein and Manning, Pattern Recognition, 38(9), 1407–1419, 2005) for longitudinal analysis of changes in syntactic complexity in language affected by neurodegenerative disorders. We manually validated CLAS scoring and used it to analyze writings of Iris Murdoch, a renowned Irish author diagnosed with Alzheimer’s disease. We found clear patterns of decline in grammatical complexity consistent with previous analyses of Murdoch’s writing conducted by Garrard, Maloney, Hodges, and Patterson (Brain, 128(250–260, 2005). CLAS is a fully automated system that may be used to derive objective and reproducible measures of syntactic complexity in language production and can be particularly useful in longitudinal studies with large volumes of language samples.     

Expression and Indication in Ethics and Political Philosophy

We sometimes have reasons to perform actions due to what they would communicate. Those who have discussed such reasons have understood what an action ‘communicates’ as what it conventionally expresses. Brennan and Jaworski argue that when a convention ensures that expressing the appropriate thing would be costly, we should change or flout the convention. I argue that what really matters is often what attitudes we indicate rather than conventionally express, using social science to show that indicating our attitudes is often unavoidably costly, and sometimes worth the cost. I use this account to defend communicative arguments for egalitarian distributive policies.

     

Republican Voters Prefer Candidates Who Have Conservative‐Looking Faces: New Evidence From Exit Polls

Research shows people share common political facial stereotypes: They associate faces with political ideologies. Moreover, given that many voters rely on party affiliation, political ideology, and appearances to select political candidates, we might expect that political facial stereotypes would sway voting preferences and, by extension, the share of votes going to each candidate in an election. And yet few studies have examined whether having a stereotypically conservative‐looking (or liberal‐looking) face predicts a candidate's vote shares. Using data from U.S. election exit polls, we show that the Republican voters within each state are more likely to vote for a candidate (even a Democrat) the more that person has a stereotypically Republican‐looking face. By contrast, the voting choices of the Democratic voters within each state are unrelated to political facial stereotypes. Moreover, we show that the relationship between political facial stereotypes and voting does not depend on state‐level ideology: Republican voters in both right‐leaning (“red”) and left‐leaning (“blue”) states are more likely to vote for candidates with conservative‐looking faces. These results have several important practical and theoretical implications concerning the nature and impact of political facial stereotypes, which we discuss.     

Inattention as a key predictor of tobacco use in adolescence

The authors examined the prediction from inattention to tobacco use among 2 cohorts (ages 7 and 13) of a community sample followed to young adulthood. Changes in self-reported tobacco use were tested with marginal transitional regression models, using parent and teacher ratings of inattention, hyperactivity-impulsivity, and other psychopathology, along with other factors, as predictors. Inattention, but not hyperactivity-impulsivity, significantly predicted adolescent tobacco use and young adult daily tobacco use. Peer substance use, parental substance use, and conduct disorder also predicted increases in tobacco use. African American ethnicity was strongly protective against later tobacco use.