ABSTRACT
Affordance perception must be considered as an interaction between the capabilities of the actor and the situation. This chapter analyzes the effect of the maximal exercise test on the precision of affordances perception. It compares two obstacle stepping judging tasks to an obstacle stepping across task. The actual critical stepping across size was defined as the obstacle size beyond which the subject changed from stepping across to jumping over the obstacle. The accuracy of judged obstacle step-acrossability can be expressed as a percentage of absolute error. The percentages of absolute error obtained after the exercise were greater than the percentages obtained before the exercise.
