評価的状況の差異が対人不安場面における心臓血管活動および心理的反応に与える影響

抄録

  We examined the effects of an evaluated situation on cardiovascular activity and psychological responses in social anxiety situation. Twenty-one undergraduate and graduate students were assigned to each of evaluated situations as follows: 1) a laboratory speaking in front of evaluators, 2) a laboratory speaking faced to a video camera. Participants of the first group as “evaluators group” performed a public speaking task in front of a male and a female evaluators who evaluated participants' speaking abilities in laboratory. In the second group as “video camera group”, participants were asked to perform a public speaking task faced to a video camera in laboratory, and the participants were informed that their performance was videotaped and their speaking abilities were going to be evaluated later. Systolic, diastolic, and mean blood pressure (SBP, DBP, MBP), heart rate (HR), cardiac output (CO), total peripheral resistance (TPR) were measured during each speaking task. Participants in the evaluators group showed greater responses in SBP, DBP, and MBP during speaking tasks more than the video camera group. Furthermore, from hemodynamic analysis, the blood pressure responses were attributed to not CO but TPR. The results indicated that facing evaluators might be an important factor that effected on the high cardiovascular activity in the social anxiety situation such as a public speaking.