Nonverbal relational control in family communication

A nonverbal component for an observational coding system of verbal relational control, the Family Relational Communication Control Coding System (FRCCCS; Friedlander & Heatherington, 1989) was developed and validated for research with families or other groups. In so doing, it was demonstrated that nonverbal relational control behaviors can be reliably identified and that these behaviors enhance communicative meaning in predictable ways. First, a pool of nonverbal behaviors with relational control meaning (e.g., head nod, raised eyebrow) was identified from consultation with family therapy researchers and from the literature. Second, the behaviors that were retained from the results of a content validity test were perceived by three independent samples as commonly understood, discrete attempts to either gain control ("one-up") or relinquish control ("one down") of a social relationship. Still other behaviors were eliminated based on results of a cluster analysis, the interpretation of which was the basis for composing operational definitions for four classes of nonverbal behaviors. Finally, assessments of the interjudge reliability and criterion validity of the nonverbal coding scheme supported its psychometric adequacy. Comparison of effect sizes showed that these discrete nonverbal behaviors accounted for over twice the variance in observers' perceptions as the verbal behaviors.