Income and neighbourhood‐level inequality predict self‐esteem and ethnic identity centrality through individual‐ and group‐based relative deprivation: A multilevel path analysis

Although income and inequality (objective measures of deprivation and the distribution of income within a defined area, respectively) predict people's self‐appraisals, the psychological mechanisms underlying these relationships are largely unknown. We address this oversight by predicting that feeling individually deprived (individual‐based relative deprivation [IRD])—a self‐focused appraisal—mediates the relationship between these two objective measures and self‐esteem. Conversely, believing that one's group is deprived (group‐based relative deprivation [GRD])—a group‐focused appraisal—mediates the relationship between these two objective measures and ethnic identity centrality. We examined these predictions in a national sample of New Zealand adults (N = 6349). As expected, income negatively correlated with IRD and GRD; in turn, IRD negatively correlated with self‐esteem, and GRD positively correlated with ethnic identity centrality. Moreover, after accounting for between‐level variability in income, neighbourhood‐level inequality had indirect effects on self‐esteem and ethnic identity centrality through IRD and GRD, respectively. Thus, income and inequality independently predicted self‐esteem and strength of ingroup identification through distinct mechanisms. Copyright © 2015 John Wiley & Sons, Ltd.     

Terminal decline of episodic memory and perceptual speed in a biracial population

We compared trajectories of terminal cognitive decline in older Black (n = 3372) and White (n = 1756) persons from a defined population who completed tests of episodic memory and perceptual speed at 3-year intervals for up to 18 years. During a mean of 9.9 years of observation, 1608 Black persons and 902 White persons died. Preterminal decline of episodic memory did not differ by race. Terminal episodic memory decline began earlier in Black persons (mean of 4.3 years before death) than in White persons (mean = 3.9 years) and progressed more slowly. By contrast, terminal decline of perceptual speed began earlier in White persons (mean = 5.0 years) than in Black persons (mean = 4.5 years). Rate of perceptual speed decline was more rapid in White persons than in Black persons in both the preterminal and terminal periods. The results indicate that terminal cognitive decline occurs in Black persons but suggest that the rate of cognitive decline during the terminal period is less rapid in Black persons than in White persons.     

Materials analogue of zero-stiffness structures

Anglepoise lamps and certain tensegrities are examples of zero-stiffness structures. These structures are in a state of neutral equilibrium with respect to changes in configuration of the system. Using Eshelby's example of an edge dislocation in a thin plate that can bend, we report the discovery of a non-trivial new class of material structures as an analogue to zero-stiffness structures. For extended positions of the edge dislocation in these structures, the dislocation experiences a zero image force. Salient features of these material structures along with the key differences from conventional zero-stiffness structures are pointed out.     

Neuro-cognitive aspects of “OM” sound/syllable perception: A functional neuroimaging study

The sound “OM” is believed to bring mental peace and calm. The cortical activation associated with listening to sound “OM” in contrast to similar non-meaningful sound (TOM) and listening to a meaningful Hindi word (AAM) has been investigated using functional magnetic resonance imaging (MRI). The behaviour interleaved gradient technique was employed in order to avoid interference of scanner noise. The results reveal that listening to “OM” sound in contrast to the meaningful Hindi word condition activates areas of bilateral cerebellum, left middle frontal gyrus (dorsolateral middle frontal/BA 9), right precuneus (BA 5) and right supramarginal gyrus (SMG). Listening to “OM” sound in contrast to “non-meaningful” sound condition leads to cortical activation in bilateral middle frontal (BA9), right middle temporal (BA37), right angular gyrus (BA 40), right SMG and right superior middle frontal gyrus (BA 8). The conjunction analysis reveals that the common neural regions activated in listening to “OM” sound during both conditions are middle frontal (left dorsolateral middle frontal cortex) and right SMG. The results correspond to the fact that listening to “OM” sound recruits neural systems implicated in emotional empathy.     

Tyrosine ameliorates heat induced delay in event related potential P300 and contingent negative variation

The efficacy of tyrosine, a catecholamine precursor, as a countermeasure in the reduction of cognitive decline during heat exposure (HE) using event-related potential P300, and contingent negative variation (CNV) was evaluated. Ten healthy males, age 20–30 years participated in the study. Volunteers received placebo or tyrosine (6.5 g) 90 min prior to HE (1.5 h in 45 °C + 30% RH). P300 latency was significantly increased (p < 0.01) during exposure with placebo, which was reduced significantly (p < 0.01) after tyrosine supplementation. There was an increase in CNV M100 latency (p < 0.05) and reaction time (p < 0.01) and decrease in M100 amplitude (p < 0.01) during HE with placebo, which returns to near normal level with the tyrosine administration. A significantly higher plasma norepinephrine (p < 0.05), dopamine and epinephrine levels were detected in tyrosine supplemented group post heat exposure. HE increases the brain catecholamine activity thereby reduces the plasma norepinephrine and dopamine level leading to a reduction in cognitive performances. Tyrosine supplementation increases the catecholamine level and reduces the impairment of cognitive performance during HE.     

Speech motor skill and stuttering

The authors review converging lines of evidence from behavioral, kinematic, and neuroimaging data that point to limitations in speech motor skills in people who stutter (PWS). From their review, they conclude that PWS differ from those who do not in terms of their ability to improve with practice and retain practiced changes in the long term, and that they are less efficient and less flexible in their adaptation to lower (motor) and higher (cognitive-linguistic) order requirements that impact on speech motor functions. These findings in general provide empirical support for the position that PWS may occupy the low end of the speech motor skill continuum as argued in the Speech Motor Skills approach (Van Lieshout, Hulstijn, & Peters, 2004).     

A new threat in the air: Macroeconomic threat increases prejudice against Asian Americans

Macroeconomic conditions have long been suspected of increasing hostility toward ethnic outgroups. Integrating prior work on macroeconomic threat with recent threat-based models of prejudice, the current work employs an experimental approach to examine the implications of economic threat for prejudice toward ethnic outgroups. In Study 1, participants primed with an economic threat (relative to a non-economic threat and neutral topic) reported more prejudice against Asian Americans, an ethnic group whose stereotype implies a threat to scarce employment opportunities. In addition, economic threat led to a heightened state of anxiety, which mediated the influence of economic threat on prejudice against Asian Americans. Study 2 replicated and extended these findings by demonstrating that economic threat heightened prejudice against Asian Americans, but not Black Americans, an ethnic group whose stereotype does not imply a threat to economic resources. These findings are discussed in terms of their implications for understanding the role of macroeconomic conditions in potentiating antisocial responses to particular outgroups.     

Time course of visual attention across perceptual levels and objects

Theories of shifts of visual attention based on attentional blink or dwell time do not directly address shifts of attention across different levels (global or local) involving multiple objects. Two experiments were conducted employing the attentional dwell time paradigm to investigate the shifts of visual attention between objects selected at same or different levels. Participants were instructed to identify two successive compound stimuli at a pre-specified level (global or local) presented at two different locations with variable SOA. The initial pair of locations in which the stimulus was presented was fixed in Experiment 1 but not in Experiment 2. Experiment 1 results showed very little impairment for second target identification when both the targets were at the global level. Attentional shift was better with both targets at the same level compared to different levels. Experiment 2 results showed that local followed by global target identification is difficult at short SOAs compared to other conditions. The results indicate that scope of attention affects the time course of visual attention. Global processing could be performed with very little capacity limitation simultaneously with distributed attention. The default mode of attention might be distributed and attention becomes focused for target identification. Different mechanisms may underlie shifts in focused attention between different locations and changes in attentional set required by changes in perceptual levels.     

Cognitive functioning,personality variables and academic achievement of hemophilic and normal children: A comparative study

The present study was conceptualized in the context of the psychosocial needs of Hemophilic children and adolescents of Kolkata. Twenty four Hemophilic children and adolescents were compared with a matched group of normal controls to find out any specific difference in terms of visuomotor gestalt functioning, intellectual level, academic achievement and personality dimensions. Academic achievement was assessed by averaging the results of the last three consecutive school examinations. Intellectual functioning was assessed by Progressive Matrices by Raven, and personality dimensions were assessed by Junior Eysenck Personality Questionnaire. Chi square tests and ANOVA were conducted to determine whether the Hemophilic children differed significantly from the normal controls across age levels. Findings revealed that there was little difference between the two groups in terms of intellectual level, and most dimensions of personality, although the Hemophilics fared worse than normals in neuropsychological, social and academic aspects. Implication for intervention is discussed.     

Assessing the impact of organizational communication on job satisfaction and job performance

The present paper analyses the impact of organizational communication on job satisfaction and job performance. Data were collected from 380 employees working at different managerial levels in various organizations in India by using Organizational Communication Scale (Roberts & O’Reilly, 1974), Job Satisfaction Survey scale (Spector, 1985), and Job Performance scale (Rodwell, Kienzle & Shadur, 1998). It was found that organizational communication had a significant effect on job satisfaction and job performance of the employees. The analysis further indicated that the employees at different levels perceived job satisfaction differently. Thus, it can be inferred that in Indian organizations, job satisfaction and performance are very much dependent on the communication behavior of the organization.