Does the "eyes lead the hand" principle apply to reach-to-grasp movements evoked by unexpected balance perturbations?

A fundamental principle that has emerged from studies of natural gaze behavior is that goal-directed arm movements are typically guided by a saccade to the target. In this study, we evaluated a hypothesis that this principle does not apply to rapid reach-to-grasp movements evoked by sudden unexpected balance perturbations. These perturbations involved forward translation of a large (2 × 6 m) motion platform configured to simulate a “real-life” environment. Subjects performed a common “daily-life” visuo-cognitive task (find a telephone and make a call) that required walking to the end of the platform, which was triggered to move as they approached a handrail mounted alongside the travel path. A deception was used to ensure that the perturbation was truly unexpected. Eleven of 18 healthy young-adult subjects (age 22-30) reached to grasp or touch the rail in response to the balance perturbation. In support of the hypothesis, none of these arm reactions was guided by concurrent visual fixation of the handrail. Seven of the 11 looked at the rail upon first entering the environment, and hence may have used “stored” central-field information about the handrail location to guide the subsequent arm reaction. However, the other four subjects never looked directly at the rail, indicating a complete reliance on peripheral vision. These findings add to previous evidence of distinctions in the CNS control of volitional and perturbation-evoked arm movements. Future studies will determine whether similar visuo-motor behavior occurs when the available handhold is smaller or when subjects are not engaged in a concurrent visuo-cognitive task.     

A pilot study of a family‐focused intervention for children and families affected by maternal depression

A non‐experimental pilot study examined child, mother and family outcomes of a 10‐session multi‐family group intervention designed to reduce risk and promote resilience for mothers with depression and their families. Positive changes following the Keeping Families Strong intervention included mother‐reported decreases in child behaviour and emotional problems, improvements in the quality of family interactions and routines and improvements in their own well‐being and support from others. Children (9–16 years) reported decreased internalizing symptoms, improved coping, increased maternal warmth and acceptance and decreased stressful family events. Attendance and mother‐reported satisfaction were high, indicating the perceived value of the intervention.     

The big five,emotional exhaustion and citizenship behaviors in service settings: The mediating role of emotional labor

Emotional labor has been widely studied because of its association with emotional exhaustion. Individual differences in emotional labor however, have attracted less research attention. This study examined the mediating role of emotional labor in the relationship between the big five, emotional exhaustion and organizational citizenship behaviors. Using structural equation modeling it was found that emotionally unstable individuals tended to surface act and this was associated with increased emotional exhaustion. In contrast, agreeable and extraverted individuals engaged in more deep acting and this had a positive association with self-reported citizenship behaviors. The implications of the results for future research and practice are discussed.     

Shyness–anxiousness and receptive language skills development in Spanish- and English-speaking preschoolers

The present study utilized a short-term longitudinal research design to model the relationship between shyness–anxiousness and receptive language skills. Hypotheses regarding the direction of the causal relationship, mediation, and moderation were evaluated. Subjects included 340 Head Start attendees from primarily English- and Spanish-speaking homes. Results suggest that a unidirectional relationship between shyness–anxiousness and receptive language skills emerges in preschool. Shyness–anxiousness impacted receptive language skills and this relationship was mediated by communication competence. Neither gender nor native language moderated the indirect relationship from shyness–anxiousness to receptive language through communication competence. These results are discussed with respect to elucidating the nature of the bidirectional relationship between shyness–anxiousness and language skills and identifying intervention targets to improve language outcomes for shy–anxious preschoolers.     

The Short Nicotine Dependence Syndrome Scale (NDSS-S) in Spanish smokers

We present a brief scale derived from the Nicotine Dependence Syndrome Scale (NDSS). We used a sample of 1.061 daily smokers, which was obtained from five Primary Care Health Centers, a Unit of Alcoholism, and a Smoking Cessation Unit. All smokers were evaluated with the NDSS and the SCID to assess nicotine dependence according to DSM-IV criteria. The results indicate the existence of a general factor of nicotine dependence according to the NDSS. We selected the items with a higher factor loading (>.50), obtaining a short scale of 6 items. With this brief scale, we obtained results similar to those of the total scale in the diverse variables (sociodemographic and smoking) of the study. Scale reliability is satisfactory (a= .79), the correlation between the short and the total scale is very high (r=.95, p<.001) and the short scale discriminates the smokers in terms of cigarette consumption and nicotine dependence, as assessed with the SCID. The operation under the ROC curve is excellent (area under the curve .84). The data indicate the usefulness of this brief scale (NDSS-S) to assess nicotine dependence in smokers.     

Signaling when (and when not) to be cautious and self-protective: impulsive and reflective trust in close relationships

A dual process model is proposed to explain how automatic evaluative associations to the partner (i.e., impulsive trust) and deliberative expectations of partner caring (i.e., reflective trust) interact to govern self-protection in romantic relationships. Experimental and correlational studies of dating and marital relationships supported the model. Subliminally conditioning more positive evaluative associations to the partner increased confidence in the partner's caring, suggesting that trust has an impulsive basis. Being high on impulsive trust (i.e., more positive evaluative associations to the partner on the Implicit Association Test; Zayas & Shoda, 2005) also reduced the automatic inclination to distance in response to doubts about the partner's trustworthiness. It similarly reduced self-protective behavioral reactions to these reflective trust concerns. The studies further revealed that the effects of impulsive trust depend on working memory capacity: Being high on impulsive trust inoculated against reflective trust concerns for people low on working memory capacity.     

Perceived past, present, and future control and adjustment to stressful life events

Perceived control is a central construct in psychology and is key to understanding individual differences in poststress outcomes (Frazier, Berman, & Steward, 2001). The goals of the current studies (using 4 samples of undergraduate students, total N = 1,421) were to examine the relations between different aspects of perceived control and poststress outcomes and to differentiate perceived control over specific events from related constructs (i.e., general control beliefs, coping strategies). To accomplish these goals, we first developed a new measure of perceived past, present, and future control over stressful life events. The data supported the content validity, factor structure, internal consistency and test-retest reliability, and convergent and discriminant validity of the new measure. Consistent with the temporal model of control (Frazier et al., 2001), these 3 forms of control had very different relations with adjustment. Present control was consistently related to lower distress levels in cross-sectional, longitudinal, and prospective analyses. Present control also predicted outcomes beyond the effects of general control beliefs and coping strategies. Past and future control had nonsignificant or positive relations with distress, although future control was associated with better outcomes (i.e., course grades) when the stressor was controllable. Thus, our measure can be used to assess the relations between perceived past, present, and future control and outcomes across a range of stressors. Because the relations between these 3 forms of control and outcomes differ markedly, measures that combine these aspects of control hinder the understanding of the important role of perceived control in adjustment to stress.     

The structure of working memory abilities across the adult life span

The present study addresses three questions regarding age differences in working memory: (1) whether performance on complex span tasks decreases as a function of age at a faster rate than performance on simple span tasks; (2) whether spatial working memory decreases at a faster rate than verbal working memory; and (3) whether the structure of working memory abilities is different for different age groups. Adults, ages 20-89 (n = 388), performed three simple and three complex verbal span tasks and three simple and three complex spatial memory tasks. Performance on the spatial tasks decreased at faster rates as a function of age than performance on the verbal tasks, but within each domain, performance on complex and simple span tasks decreased at the same rates. Confirmatory factor analyses revealed that domain-differentiated models yielded better fits than models involving domain-general constructs, providing further evidence of the need to distinguish verbal and spatial working memory abilities. Regardless of which domain-differentiated model was examined, and despite the faster rates of decrease in the spatial domain, age group comparisons revealed that the factor structure of working memory abilities was highly similar in younger and older adults and showed no evidence of age-related dedifferentiation.     

Emergence: logical, functional and dynamical

Philosophical accounts of emergence have been explicated in terms of logical relationships between statements (derivation) or static properties (function and realization). Jaegwon Kim is a modern proponent. A property is emergent if it is not explainable by (or reducible to) the properties of lower level components. This approach, I will argue, is unable to make sense of the kinds of emergence that are widespread in scientific explanations of complex systems. The standard philosophical notion of emergence posits the wrong dichotomies, confuses compositional physicalism with explanatory physicalism, and is unable to represent the type of dynamic processes (self-organizing feedback) that both generate emergent properties and express downward causation.     

Does personality matter? Openness correlates with vote choice,but particularly for politically sophisticated voters

Though psychologists show that personality predicts socio-political attitudes, political scientists caution that most voters are incapable of such disciplined voting. We integrate these competing traditions by arguing that personality correlates with vote choice, but primarily among the politically sophisticated. Utilising two nationally-representative datasets (Study 1: n = 6518; Study 2: n = 17434) from two countries (New Zealand and the United States, respectively), we show that Openness to Experience is inversely associated with conservative vote choice (Studies 1–2) and socio-political attitudes (Study 2). As predicted, these relationships were particularly robust among the politically sophisticated. These studies provide a much-needed qualification to the literature and demonstrate the benefits of using an interdisciplinary approach when examining the personality correlates of socio-political attitudes.