Recently, researchers have measured hand movements en route to choices on a screen to
understand the dynamics of a broad range of psychological processes. We review this
growing body of research and explain how manual action exposes the real-time unfolding of
underlying cognitive processing. We describe how simple hand motions may be used to
continuously index participants' tentative commitments to different choice alternatives during
the evolution of a behavioral response. As such, hand-tracking can provide unusually high …

Recently, researchers have measured hand movements en route to choices on a screen to
understand the dynamics of a broad range of psychological processes. We review this
growing body of research and explain how manual action exposes the real-time unfolding of
underlying cognitive processing. We describe how simple hand motions may be used to
continuously index participants' tentative commitments to different choice alternatives during
the evolution of a behavioral response. As such, hand-tracking can provide unusually high …