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Glossary

Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.

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Cause and Effect Software(also: Cause and Effect Games, Contingency Learning Software)
Simple interactive software designed for users with significant cognitive or motor disabilities, where any input (such as pressing a switch) produces an immediate sensory response (visual, auditory, or both). These programs help users understand the relationship between their…
Challenge-Point Framework
A motor-learning theory proposed by Guadagnoli and Lee (2004) which holds that learning is optimised when the difficulty of a task is appropriately matched to the learner's current skill level. Tasks that are too easy provide little information to learn from, while tasks that…
Closed-loop Interaction(also: Closed-Loop Feedback, Perform-Assess-Adjust Cycle)
An interaction pattern in which a system continuously observes the user's action, evaluates it, and returns immediate feedback that shapes the next attempt, producing an iterative perform-assess-adjust cycle. Closed-loop interaction contrasts with open-loop designs that present…

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