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Seventy-two male and 73 female undergraduates were randomly assigned to an experimental group, in which they wrote expressively about a relationship breakup, or to a control group, in which they wrote in a non-emotional manner about impersonal relationship topics. Control participants reported short-term increases in upper respiratory illness (URI) symptoms, tension and fatigue, whereas experimental participants did not. Further, higher levels of intrusive thoughts and avoidance were associated with short-term increases in URI symptoms in the control group, but were unrelated to URI symptoms in the experimental group. Finally, there was a trend ( p <0.06) suggesting that experimental participants were more likely to reunite with their ex-partner than were control participants. These findings indicate that expressive writing has a wide range of social, emotional, and physical health benefits for individuals coping with stressful events, particularly if they are experiencing ongoing intrusive thoughts and avoidance responses related to the stressor.
Lepore et al. (Tue,) studied this question.