Institutional status and identity dimensions to cardiovascular stress responses

Abstract

This study aimed to examine the effect of shared social identity (i.e., whether the source of information about a stressor comes from an ingroup vs. outgroup member) and message content (i.e., whether people were informed that the task is stressful vs. challenging) on cardiovascular reactivity to stress (CVR) across two higher education institutions differing in status (University vs. Institute of Technology [IoT]). The study employed a quasi-experimental 2 × 2 × 2 design. 80 healthy undergraduate students (38 female, 47.5%) were recruited from two institutions—a University (n = 40) and an IoT (n = 40). All students underwent a standardised cardiovascular stress testing protocol (i.e., baseline rest period, manipulation, stress task). Blood pressure and heart rate were continuously monitored throughout. Results indicated that IoT students who were informed that the task would be stressful by an outgroup member (a University student) displayed relatively higher SBP reactivity (M = 17.53, SD = 4.72). Interestingly, those from the University who were informed that the task would be stressful by an ingroup member (also a University student) similarly displayed high level of reactivity (M = 19.45, SD = 4.33). It appears that being told the task is stressful had different effects depending on what institution the person was in, and who provided the information. These findings provide preliminary evidence to suggest that cardiovascular responses to stress may not simply be impacted by the source or content, but also the status or social position of the informants group.