Scenes from a restaurant: Privacy regulation in stressful situations

Stress results when an individual has less control over an environment or a situation than is desired. One way of regaining control and reducing stress is to regulate privacy by screening the self from spatial, visual or acoustical invasion. This study examined the use of architectural features to regulate privacy under hypothetical situations that are likely to generate low, moderate and high stress, comparing the seating choices of males and females in a variety of dining scenarios in a restaurant. In more stressful circumstances such as those associated with a job interview, participants chose restaurant seating bounded by more architectural features than they did in more relaxed dining situations such as dining with friends. Males and females appeared to be different in their responses to moderate and high stress situations. These results have implications for designers of secondary settings where stressful interactions are likely to take place.     

Light and social effects on the free-running circadian activity rhythm in common marmosets (Callithrix jacchus; Primates): social masking,pseudo-splitting,and relative coordination

Summary The variability of period of the free-running circadian activity rhythm (CAR) and the degree to which it is affected by social factors was studied in diurnal marmosets (Callithrix jacchus: Primates, Cebidae), kept either singly or in pairs. Under continuous light intensities between 10^-1 and 10² lx, the spontaneous period was always shorter than 24h. It varied in relation to the amount of time spent under constant conditions (after-effects). There was some evidence of an effect of light intensity on free-running period, but no clear correlation between the two. Mutual acoustic social contact caused some males to exhibit pseudo-splitting, ascribable to positive social masking, and in many cases also resulted in relative coordination of the free-running CAR. True social entrainment, however, was not produced. The possibility that the latter could occur under some conditions is discussed, as well as the neural pathways that might mediate the observed acoustically induced social effects on the central nervous system pacemaker(s) of the circadian timing system.