Limitations of distal effect anticipation when using tools

Modern technologies progressively create workplaces in which the execution of movements and the observation of their consequences are spatially separated. Challenging workplaces in which users act via technical equipment in a distant space include aviation, applied medical engineering and virtual reality. When using a tool, proprioceptive/tactile feedback from the moving hand (proximal action effect) and visual feedback from the moving effect point of the tool, such as the moving cursor on a display (the distal action effect) often do not correspond or are even in conflict. If proximal and distal feedback were equally important for controlling actions with tools, this discrepancy would be a constant source of interference. The human information processing system solves this problem by favoring the intended distal action effects while attenuating or ignoring proximal action effects. The study presents an overview of experiments aiming at the underlying motor and cognitive processes and the limitations of visual predominance in tool actions. The main findings are, that when transformations are in effect the awareness of one's own actions is quite low. This seems to be advantageous when using tools, as it allows for wide range of flexible sensorimotor adaptations and – may be more important – it evokes the feeling of being in control. Thus, the attenuation of perceiving one's own proximal action effects is an important precondition for using tools successfully. However, the ability to integrate discordant perception-action feedback has limits, especially, but not only, with complex transformations. When feature overlap between vision and proprioception is low, and when the existence of a transformation is obvious proximal action effects come to the fore and dominate action control in tool actions. In conclusion action–effect control plays an important role in understanding the constraints of the acquisition and application of tool transformations.     

Switch detection in preschoolers' cognitive flexibility

The current study addressed the role of switch detection in cognitive flexibility by testing the effect of transition cues (i.e., cues that directly signal the need to switch or maintain a given task goal) in a cued set-shifting paradigm at 5 years of age. Children performed better, especially on switch trials, when transition cues were combined with traditional task cues (i.e., cues that directly signal the relevant task on a given trial) relative to conditions without transition cues. This effect was not influenced by explicit knowledge of transition cues or transition cue transparency, suggesting that transition cues did not need to be semantically processed to be beneficial. These findings reveal that young children’s difficulties in set-shifting situations stem partially from failures to monitor for the need to switch.     

Social disadvantage and the self-regulatory function of justice beliefs

Five studies support the hypothesis that beliefs in societal fairness offer a self-regulatory benefit for members of socially disadvantaged groups. Specifically, members of disadvantaged groups are more likely than members of advantaged groups to calibrate their pursuit of long-term goals to their beliefs about societal fairness. In Study 1, low socioeconomic status (SES) undergraduate students who believed more strongly in societal fairness showed greater intentions to persist in the face of poor performance on a midterm examination. In Study 2, low SES participants who believed more strongly in fairness reported more willingness to invest time and effort to achieve desirable career outcomes. In Study 3, ethnic minority participants exposed to a manipulation suggesting that fairness conditions in their country were improving reported more willingness to invest resources in pursuit of long-term goals, relative to ethnic minority participants in a control condition. Study 4 replicated Study 3 using an implicit priming procedure, demonstrating that perceptions of the personal relevance of societal fairness mediate these effects. Across these 4 studies, no link between fairness beliefs and self-regulation emerged for members of advantaged (high SES, ethnic majority) groups. Study 5 contributed evidence from the World Values Survey and a representative sample (Inglehart, Basa?ez, Diez-Medrano, Halman, & Luijkx, 2004). Respondents reported more motivation to work hard to the extent that they believed that rewards were distributed fairly; this effect emerged more strongly for members of lower SES groups than for members of higher SES groups, as indicated by both self-identified social class and ethnicity.     

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.     

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 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.     

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.     

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.     

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.