The Dual Functions of Adaptors

Adaptors, self-touching movements that supposedly lack communicative significance, have often been overlooked by researchers focusing on co-speech gestures. A significant complication in their study arises from the somewhat ambiguous definition of adaptors. Examples of these movements include self-manipulations like scratching a leg, bringing a hand to the mouth or head, and fidgeting, nervous tics, and micro hand or finger movements. Research rooted in psychology indicates a link between adaptors and negative emotional states. However, psycholinguistic approaches suggest that these movements might be related to the communicative task. This study analyzes adaptors in forty Cantonese speakers of English as a second language in monologues and dialogues in face-to-face and online contexts, revealing that adaptors serve functions beyond emotional expression. Our data indicate that adaptors might have cognitive functions. We also identify micro-movements, flutter-like adaptors or “flutters” for short, that may have interactive functions conveying engagement. These findings challenge the traditional view of adaptors as purely non-communicative. Participants’ self-reports corroborate these interpretations, highlighting the complexity and individual variability in adaptor use. This study advocates for the inclusion of adaptors in gesture analysis, which may enrich understanding of gesture–speech integration and cognitive and emotional processes in communication.