“…That is, there are large individual differences in expressive accuracy ( Human & Biesanz, 2013 ), the tendency to be accurately perceived, also termed judgeability ( Colvin, 1993 ), or being a good target ( Funder, 1995 ). Although multiple factors can influence expressive accuracy, past research has primarily examined the role of broad individual differences, such as psychological well-being (e.g., Human et al, 2014 ; Human et al, 2019 ) and personality traits like extroversion ( Colvin, 1993 ; Human et al, 2021 ). Here, we examine the role of intrapersonal behavioral coordination (IBC), or the degree of movement coordination between the head and body within a person, as an indicator of nonverbal expressivity.…”