Figure 1. Mean change scores (±1 standard deviation) in systolic blood pressure (SBP) (mm Hg) elicited by the stressor, by experimental condition. A significant interaction is noted (p = .05). Those in the evaluative alone condition exhibited significantly greater SBP reactivity than did those in the nonevaluative alone condition. Potential for evaluation did not influence SBP reactivity when a companion was present.