Exercise 1 Left/right discrimination with app

A hand laterality recognition task is introduced to assess how quickly and accurately someone can identify left and right hands. The learner is shown 20 hand images and must make rapid left/right judgments, with speed emphasized more than careful deliberation. The exercise also highlights common reactions during the task, such as guessing, speaking answers aloud, moving the head, or reacting to mistakes. The test is then repeated under more controlled conditions: without saying the answers, without self-correction, and without head movement. Results are reviewed using two measures: response time and accuracy. The explanation links response time to attention and possible attentional bias toward or away from a body part, while accuracy is associated with body schema precision, or how clearly the body is represented mentally. Example results are interpreted against normative ranges, noting a slower left-hand response and relatively low initial accuracy, while also stressing that one test alone is limited and that averaging several attempts is more useful. A repeated trial shows how performance may improve with practice.