Descriptions: This article recounted the classical interaction problems from the cyclic interaction framework, focussing on the effect-to-goal path that is far from having empirical validity. In particular, we examined how cognitive impaired patients' action subgoals are formed and reorganised during interaction and how system effect can facilitate or hinder this process.
Three experiments were carried out which show that the patients are reorganising action subgoals from system effects, where two types of interaction problems are most likely to occur: action subgoal construction-elimination and excessive working memory load. As to the former, implicit feedback (or no feedback) made users more likely to revisit the action subgoals they had actually achieved or inadvertently create the wrong action subgoals or start over the task. The latter means that the unnecessary goals arising from not deleting the completed goal caused working memory overload because the redundant goals are buffered and interfere with other goals in the goal stack.
Such elaborated cognitive analysis on the effect-to-goal path in the cyclic interaction framework may allow an interaction designer to make explicit how cognitive impaired users are expected to use the system effect given to generate the next action subgoal and to predict potential effect-to-goal problems that might be used to reason about new effect-to-goal interaction design such as explicit feed-forward.
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