What is skill?

Skill generally refers to an activity or task with a specific purpose or goal. It can be used as a noun to describe the task itself, or as an adjective to indicate the quality of performance, such as 'a skilled golfer.'

Three main factors determine skill level: the performer's consistency in achieving the task's goal, their ability to achieve the goal under varied conditions (e.g., different environments or pressure), and their degree of efficiency, demonstrated by strategy, attention focus, and minimal muscular effort.

A motor skill (or action) requires voluntary limb movement to achieve a goal and causes a change in the environment or the person's relation to it. This differs from cognitive skill, which involves mental activity like decision-making or problem-solving without physical movement. Some tasks, like playing piano, require both.

Motor skills have a clear purpose, are performed voluntarily (not reflexively), require movement of joints and body segments, and must be learned or relearned. Blinking, for example, is not a motor skill because it's involuntary and not learned, unlike walking, which is a learned motor skill.