Refining the understanding of inhibitory processes: how response prepotency is created and overcome

Understanding (a) how responses become prepotent provides insights into when inhibition is needed in everyday life. Understanding (b) how response prepotency is overcome provides insights for helping children develop strategies for overcoming such tendencies. Concerning (a), on tasks such as the day‐night Stroop‐like task, is the difficulty with inhibiting saying the name of the stimulus due to the name being semantically related to the correct response or to its being a valid response on the task (i.e. a member of the response set) though incorrect for this stimulus? Experiment 1 (with 40 4‐year‐olds) suggests that prepotency is caused by membership in the response set and not semantic relation. Concerning (b), Diamond, Kirkham and Amso (2002) found that 4‐year‐olds could succeed on the day‐night task if the experimenter sang a ditty after showing the stimulus card, before the child was to respond. They concluded that it was because delaying children’s responses gave them time to compute the correct answer. However, Experiment 2 (with 90 3‐year‐olds) suggests that such a delay helps because it gives the incorrect, prepotent response time to passively dissipate, not because of active computation during the delay.     

After Adversity Strikes: Predictions, Recollections and Reality Among People Experiencing the Onset of Adverse Circumstances

Numerous studies on affective forecasting have demonstrated that people frequently underestimate their ability to adapt to adverse circumstances. But to date, these studies have not assessed people’s affective forecasts early in the experience of these new circumstances. We present two longitudinal studies of people experiencing new adversities. In the first study 54 patients experiencing new limb amputations were recruited to participate in a mailed survey. Patients assessed their well-being, functioning and general health (1) two weeks after discharge from the hospital and (2) three months later. At the first time point patients also predicted their well-being, functioning and general health at three months. In the second study 55 patients experiencing new colostomies were recruited and received mailed surveys at three time points; (1) at baseline (within one week after leaving the hospital), (2) one month after baseline, and (3) seven months after baseline. Again we assessed their actual and predicted well-being, functioning and general health. In both studies the actual change was compared to the change expected by patients. Across both studies, patients expected to significantly improve on all three domains but reported little actual improvement. Together, these studies demonstrated that people with new disabilities overestimate hedonic adaptation—they expect their overall well-being to improve more than it actually does.     

Ageing and the misplacing of objects

A lost and found questionnaire was administered to 281 young and 153 old subjects to examine incidents in which objects were misplaced and recovered. Incidents were reported by 31·3 per cent of the young and 26·1 per cent of the old subjects, a difference that was not significant. Subjects reporting an incident rated themselves as more absentminded than subjects not reporting an incident. The roles of absentmindedness and perceptual problems in creating these incidents were examined. Only the latter showed significant differences with age. More old than young subjects reported finding the object in plain sight, in its proper place, and in a place already searched, suggesting a tendency with age to overlook objects in obvious places.     

A normative perspective on the linguistic intergroup bias: How intragroup approval of ingroup members who use the linguistic intergroup bias perpetuates explicit intergroup bias

The present research examined from a normative perspective how intragroup normative processes regulate the consequences of the linguistic intergroup bias (LIB). Results of three studies supported our hypothesis that intragroup approval of an ingroup member who uses the LIB plays a key role in perpetuating pro-ingroup bias. In Study 1, ingroup members who used pro-ingroup (vs. pro-outgroup) LIB elicited more intragroup approval and this effect was mediated by the perception of the speaker as being biased in favor of the ingroup. In Studies 2 and 3, intragroup approval (vs. disapproval) of an ingroup member who used the LIB enhanced the expression of pro-ingroup bias. By providing the first demonstration of how the LIB relates to intragroup normative processes, our studies highlight a new path by which the LIB helps perpetuate intergroup bias.     

Cumulative trauma,emotion reactivity and salivary cytokine levels following acute stress in healthy women

Background and Objectives: To better understand how trauma leads to poor health, this study examined whether cumulative trauma and emotion reactivity contribute to pro- (IL-1β) and anti-inflammatory (IL-10) salivary cytokine levels after stress.

Design: Seventy-three women, screened to be physically and mentally healthy, completed an acute stress paradigm and measures of lifetime trauma exposure.

Method: Saliva was collected 10?min before (i.e., baseline) and 35?min after the onset of a 10-min stressor. State negative and positive emotion were measured at baseline and post-stress.

Results: Most participants reported exposure to at least one trauma, with a mean of five. Cumulative trauma was associated with higher post-stress IL-1β and IL-1β/IL-10, but not with IL-10 or changes in emotion. Declines in positive emotion correlated with greater post-stress IL-1β.

Conclusions: These findings suggest that both cumulative trauma exposure and positive emotion have implications for salivary cytokine responses to acute stress. The inclusion of healthy women strengthens internal validity, and increases confidence that observed associations between trauma and salivary cytokine responses can be attributed to trauma, rather than to confounding health problems. This study adds to the growing literature examining how trauma may connect to cytokines, and ultimately, poor health.     

The reproduction of vertical and oblique orientations in the visual, haptic, and somatovestibular systems

This study investigates whether the vertical orientation may be predominantly used as an amodal reference norm by the visual, haptic, and somato-vestibular perceptual systems to define oblique orientations. We examined this question by asking the same sighted adult subjects to reproduce, in the frontal (roll) plane, the vertical (0°) and six oblique orientations in three tasks involving different perceptual systems. In the visual task, the subjects adjusted a moveable rod so that it reproduced the orientation of a visual rod seen previously in a dark room. In the haptic task, the blindfolded sighted subjects scanned an oriented rod with one hand and reproduced its orientation, with the same hand, on a moveable response rod. In the somato-vestibular task, the blindfolded sighted subjects, sitting in a rotating chair, adjusted this chair in order to reproduce the tested orientation of their own body. The results showed that similar oblique effects (unsigned angular error difference between six oblique orientations and vertical orientation) were observed across the three tasks. However, there were no positive correlations between the visual, haptic,