| Term | Definition |
| motor skills | activities or tasks that require voluntary head, body, and/or limb movement to achieve a goal |
| motor learning | the study of the acquisition of motor skills, the performance enhancement of learned or highly experienced motor skills, or the reacquisition of skills that are difficult to perform or cannot be performed because of injury, disease, and the like. |
| motor control | the study of how our neuomuscular system functions to activate and coordinate the muscles and limbs involved in the performance of a motor skill |
| motor development | the study of human development from infancy to old age with specific interest in issues related to either motor learning or motor control |
| movements | behavioral characteristics of specific limbs or a combination of limbs that are compnent parts of an action or motor skill |
| gross motor skill | a motor skill that requires the use of large musculature to achieve the goal of the skill |
| fine motor skill | a motor skill that requires control of small muscles to achieve the goal of the skill |
| discrete motor skill | a motor skill with clearly defined movement beginning and end points, usually requiring a simple movement |
| continuous motor skill | a motor skill with arbitrary movement beginning and end points. |
| serial motor skill | a motor skill involving a series of discrete skills |
| environmental contest | the supporting surface, objects, and/or other people involved in the enironment in which a skill is performed |
| closed motor skill | a motor skill performed in a stationary environment where the performer determines when to begin the action |
| open motor skill | a motor skill that involves a nonstble, unpredictable environment where an object or environment context is in motion and determines when to begin the action |
| taxonomy | a classification system organized according to relationships among the component characteristics of the group of items or objects being classified |
| regulatory conditions | charactristics of the environmenal context determine the movement characteristics needed to perform an action |
| interitrial variability | refers to whether the regulatory conditions associated with the performance of a skill in one situation or for one trial are present or absent in the next situation or trial |