Rhythmic organization of social interaction and observer ratings of positive affect and involvement

Abstract

Many investigators have speculated that a high degree of rhythmic patterning of social interaction and close coupling between the activity rhythms of partners are associated with positive affect, attachment, and interpersonal attraction. Others suggest that predictable or rhythmic patterning is an indication of inflexibility, and that close linkages between the physiological arousal of partners are associated with negative affect. In the present study, spectral and cross spectral analyses were applied to vocal activity and heart rates recorded during 12 conversations. Indexes of rhythmicity and strength of coupling were derived and used as predictors of observer ratings of pleasantness of affect and degree of involvement. There was a curvilinear relationship between affect and rhythmicity of vocal activity, such that moderately rhythmic social interactions were evaluated most positively. This relationship remained statistically significant even when other variables (such as mean and standard deviation of amount of vocal activity) were statistically controlled. Strength of coupling between partner vocal activity patterns and strength of coupling between the vocal activity and heart rate within speaker were not statistically significant predictors of ratings of pleasantness. Results suggest that there may be an optimum degree of rhythmicity in social interaction, with moderately rhythmic interactions evaluated most positively.