Effects of facial expression and gaze direction on approach-avoidance behaviour

Humans must coordinate approach-avoidance behaviours with the social cues that elicit them, such as facial expressions and gaze direction. We hypothesised that when someone is observed looking in a particular direction with a happy expression, the observer would tend to approach that direction, but that when someone is observed looking in a particular direction with a fearful expression, the observer would tend to avoid that direction. Twenty-eight participants viewed stimulus faces with averted gazes and happy or fearful expressions on a computer screen. Participants were asked to grasp (approach) or withdraw from (avoid) a left- or right-hand button depending on the stimulus face's expression. The results were consistent with our hypotheses about avoidance responses, but not with respect to approach responses. Links between social cues and adaptive behaviour are discussed.     

The Aesthetic Preference for Nature Sounds Depends on Sound Object Recognition

People across the world seek out beautiful sounds in nature, such as a babbling brook or a nightingale song, for positive human experiences. However, it is unclear whether this positive aesthetic response is driven by a preference for the perceptual features typical of nature sounds versus a higher‐order association of nature with beauty. To test these hypotheses, participants provided aesthetic judgments for nature and urban soundscapes that varied on ease of recognition. Results demonstrated that the aesthetic preference for nature soundscapes was eliminated for the sounds hardest to recognize, and moreover the relationship between aesthetic ratings and several measured acoustic features significantly changed as a function of recognition. In a follow‐up experiment, requiring participants to classify these difficult‐to‐identify sounds into nature or urban categories resulted in a robust preference for nature sounds and a relationship between aesthetic ratings and our measured acoustic features that was more typical of easy‐to‐identify sounds. This pattern of results was replicated with computer‐generated artificial noises, which acoustically shared properties with the nature and urban soundscapes but by definition did not come from these environments. Taken together, these results support the conclusion that the recognition of a sound as either natural or urban dynamically organizes the relationship between aesthetic preference and perceptual features and that these preferences are not inherent to the acoustic features. Implications for nature's role in cognitive and affective restoration are discussed.     

Peer relationships and academic achievement as interacting predictors of depressive symptoms during middle childhood

This article reports a longitudinal investigation that examines academic and social difficulties as predictors of depressive symptoms during middle childhood. Participants were 199 elementary school children (M=9.1 years) who were followed for 2 consecutive school years. In both years of the project, children completed a questionnaire assessing depressive symptoms and a peer nomination inventory assessing friendships and social standing. Grade point averages (GPAs) were obtained from a review of school records. Low GPAs were predictive of depressive symptoms, but this effect did not hold for children who had numerous friends. Similarly, children who had relatively few friends tended to experience depressive symptoms. However, the effect was attenuated for children with high GPAs. Taken together, the findings suggest that competencies in 1 domain can moderate the risks associated with difficulties in the other domain.     

Violent Victimization in the Community and Children’s Subsequent Peer Rejection: The Mediating Role of Emotion Dysregulation

This paper describes a short-term longitudinal study of the relation between violent victimization in the community and peer rejection among 199 children (mean age = 9.02 years) attending two urban Los Angeles area elementary schools. We used a multi-informant approach to assess victimization by community violence, peer group victimization, peer rejection, and impairments in emotion regulation. These data were collected annually for two consecutive school years. Violent victimization in the community predicted later peer rejection after accounting for the effects of initial levels of peer rejection. Analyses indicated that this relation was mediated by deficient emotion regulation skills. In addition, we found evidence that victimization by community violence and peer rejection are reciprocally related over time. The developmental implications of these findings are discussed.     

Cooperative strain accommodation over grains in martensitic transformation from Fe-Ni nanocrystalline austenite

This paper reports an investigation of martensitic transformation behaviour from austenite with various grain sizes ranging from 290 nm to 34 μm in an Fe–Ni alloy fabricated by electrodeposition and subsequent heat treatment. We confirmed that martensite morphology changed from lath to thin plate with decreasing the austenite grain size. Crystallographic orientation analysis revealed that the variants of thin plate martensite formed in the austenite with relatively coarse grains achieved self-accommodation of the transformation strain inside one austenite grain. In contrast, the transformation strain accompanying martensitic transformation from the ultrafine-grained or nanocrystalline austenite was not accommodated by the martensite variants formed in one austenite grain but accommodated cooperatively by those formed in the several adjacent austenite grains.     

Modulations of muscle modes in automatic postural responses induced by external surface translations

The authors applied principal component analysis to investigate muscle activation patterns (M-modes) involved in the automatic postural responses induced by external surface perturbations. They focused on M-mode modulations as responses to the effects of practice, stability of the conditions and perturbed directions. While peak center of mass velocity reduced with practice, M-modes were similar with practice and across stability conditions. In contrast, atypical sway mode coactivations that combined proximal trunk muscles with distal muscles of the opposite lower extremity of the ventral-dorsal side were observed under the unstable conditions in both forward and backward perturbations after practice. In addition, M-modes in the forward translations were characterized by increased cocontraction patterns. Results suggest that compositions of the underlying M-modes show minor differences in each perturbed direction, but practice enhances coactivation patterns combining proximal muscles with distal muscles, and with accompanying cocontraction patterns, under more challenging conditions.     

Negative support of significant others affects psychological adjustment in breast cancer patients

Significant others play an important role in providing support in patients' lives, but some types of support negatively affect the patients. This study was conducted in early-stage breast cancer patients to examine the structure of support, which was provided by their significant others and assessed negatively by the patients, and to identify negative support relating to the psychological adjustment of these patients. Thus, we first conducted interviews among 28 breast cancer patients to identify these support items assessed as negative; next, we conducted a questionnaire survey using the resulting items in 109 postoperative patients who had early-stage breast cancer. We performed exploratory and confirmatory factor analyses and obtained a valid second-order factor structure, including superordinate factors (excessive engagement, avoidance of problems and underestimation) and subordinate factors (overprotection, encouragement and management). Among these factors, the avoidance of problems was the only factor to be negatively associated with psychological adjustment of the patients, suggesting that these patients receive problem-avoiding support. The results of our study suggest that such problem-avoiding support from significant others can be counter-productive and potentially worsen the psychological adjustment of breast cancer patients.     

The association between peer victimization and functioning at school among urban Latino children

This study utilized a multi-informant approach to investigate the concurrent association between peer victimization and functioning at school in a predominantly Latino sample of 135 children (55 boys; 80 girls) in the third, fourth, and fifth grades. The children attended elementary schools in economically distressed urban neighborhoods. Victimization by peers was associated with low grade point averages (GPA) and poor school engagement. Mediation analysis showed that school engagement explained the relation between peer victimization and GPA. Moderator analyses indicated that the negative association between peer victimization and school engagement was exacerbated for children with numerous friends in their classrooms. Additional moderator analyses revealed that the negative association between victimization and engagement was stronger for children with many aggressive friends. The results extend past research by investigating a mediator and moderators of the association between peer victimization and functioning at school in an understudied population.     

A pattern of common acoustic modification by human mothers to gain attention of a child and by macaques of others in their group

Criticisms of how Niwano and Sugai (2002) conducted their analysis of pitch change in human mothers' repeated utterances to their children suggest mothers resort to utterance with elevated pitch when infants are initially unresponsive. When this phenomenon is compared with an evaluation of similar data for free-ranging macaques, a certain common pattern of human mothers and the macaques may be observed in seeking to gain the attention of another.     

Threading dislocation with b=c+2a in 4H-SiC as determined by LACBED

The Burgers vectors of the so-called threading screw dislocations (a total of 28 dislocations) in 4H-SiC were determined by large-angle convergent-beam electron diffraction. A new type of TSD, that is, b = c + 2a dislocation, was identified. Thus, all of the four types of TSD predicted by Onda et al. [Phil. Mag. Lett. 93 (2013) p.591] were identified.