RESUMO
Stereotypes are tools of social perception that attribute a superficial uniformity to individuals within a social group, providing an instrument to assess individuals and groups. The stereotype content model (SCM) provides a framework for understanding these dynamics. SCM explores how groups are stereotyped on competence and warmth. This research utilizes the SCM to study India, a heterogenous society with diverse social groups. The purpose of this paper is to study caste stereotypes using SCM within India while also comparing two distinct regions of the country - the north and the south. This study is unique because (a) earlier studies have not explored stereotyping while recognizing the regional variations "within" India and (b) it applies SCM to caste. We also include how caste perceptions are further defined for groups that fall under the affirmative action program. Using Amazon's Mechanical Turk, we recruited subjects who responded to questions that assessed stereotypes of different social groups. The results indicate the presence of more ambivalent stereotypes and higher belief in karmic ideology in the four southern states compared to the northern states. Possible explanations discussed.
RESUMO
The effects of chronic exposure to a mildly cold ambient temperature (T(a)) of 18 degrees C on sleep wakefulness (S-W) and brain temperature (T(br)) were studied in the medial preoptic area (mPOA) lesioned male Wistar rats. Electroencephalogram (EEG), electrooculogram (EOG) and electromyogram (EMG) electrodes were chronically implanted to assess S-W, and a thermocouple above the dura to record the T(br). After three recordings (24 h each) of S-W and T(br) at 24 degrees C, N-methyl D-aspartic acid (NMDA) was intracerebrally injected to produce bilateral destruction of neurons in the mPOA. There was decreased sleep and increased T(br) even four weeks after the mPOA lesion. T(a) of the environmental chamber was then reduced to 18 degrees C, and the S-W and T(br) were again recorded for 24 h each on the 1st, 7th, 14th, 21st, and on 28th days of continuous exposure to the mild cold T(a). Exposure to the cold produced further decrease in sleep and increase in the T(br). However, sleep came back to the pre-exposure level by the 14th day. An increase in the duration of sleep episodes was responsible for the restoration of sleep during chronic cold exposure. The study showed that the requirement of sleep was reset at a lower level in the mPOA lesioned rats. The mPOA lesion affected the sleep maintenance and sleep initiation, though the latter became evident only during chronic cold exposure. The magnitude of the acute changes in T(br) and S-W were less in the lesioned rats, as compared to those observed in the normal rats exposed to similar cold T(a). On the basis of these observations, it could be proposed that the mPOA plays some role in cold induced changes in thermoregulation and sleep regulation. The T(br) remained elevated throughout the period of cold exposure. Resetting of the T(br), at a higher level may be part of the homeostatic readjustment to restore sleep.
