This distinction refers to: 1. the hand that performs faster or more precisely on manual tasks; and 2. the hand preferred for use, regardless of performance. In addition, there is another ongoing debate about how many types of handedness there are: right versus left, right versus non-right, and whether or not ambidexterity should be included. Handedness should be distinguished from manual specialization: a division of labor between the two hands in performing a bimanual task (e.g., one hand writes, other hand and arm used to support body while writing). The question is how a hand preference becomes incorporated into tasks requiring bimanual specialization during development.
See Ambidexterity, Bimanual task, Finger-tapping task, Hand preference, Hand proficiency, Handedness (general), Lateral bias, Laterality, Peg-moving task, Unimanual task