Reading focus
Syllabus: How Do Brain and Body Regulate Each Other?
Use the pathway account to interpret the timing and divergence of the measured responses. Identify the social context that was randomized and the emotional processes that were only measured.
A question to consider. What does this experiment establish about an evaluative situation, and what additional manipulation would be needed to establish that shame carries its effect on cortisol?
Why this reading
The same demanding activity can have different physiological consequences depending on its social setting. By randomly assigning an evaluative context, this study provides a way to investigate that claim without assuming that any difficult task produces an interchangeable stress response. Its several measures also expose the distance between changing a situation and identifying the psychological process that carries its effect.
Before you read
Eighty-one undergraduates completed demanding speech and arithmetic tasks under social-evaluative or nonevaluative conditions. The evaluative condition included an unfriendly audience and evaluative framing. Salivary cortisol samples, cardiovascular measures, emotion ratings, and self-esteem ratings tracked different responses. Random assignment concerns the task condition; shame and self-esteem were measured. Mediation would require evidence about how an intermediate process carries an effect, beyond its correlation with another response.
Read for
- Inspect the features shared by both conditions and the features changed together. Decide how narrowly the causal comparison can be described.
- Follow the timing of the samples and compare cortisol with heart rate, blood pressure, anxiety, and the two shame measures. Do the measures all tell the same story?
- Separate the randomized condition effect from analyses relating psychological changes to cortisol. Consider baseline differences, adjustment, sample restrictions, and the short recovery period.
Consider afterwards
- How would you distinguish the effect of an audience's presence from the effect of being negatively evaluated?
- What additional evidence would be needed to argue that shame, specifically, causes the cortisol change?
Editorial context
The findings concern an acute laboratory challenge in a restricted undergraduate sample. Both task conditions were demanding; the result is not that only one group experienced stress. The shame measures were not equally robust, and their relation to cortisol does not demonstrate a causal mediator. The authors also consider whether the evaluative task was more intense rather than qualitatively different. The study does not establish long-term illness risk or imply that social threat has identical effects across people and settings.