Hareket seçiminin özellik tekrarı paradigması ile kategorik ve metrik incelemesi

Theory of Event Coding (TEC) suggests that all stimulus features and associated action patterns are bound together in an event file, which is reactivated even when a single feature therein is repeated. Partial repetition cost is the decrease in performance when some features of a stimulus-response pair are repeated in the next pair as opposed to the complete repetition or alteration of the features. Currently, a contradiction in the literature is that studies using metrical rather than categorical features fail to replicate the effect. Since TEC does not discuss the effect of different feature types (categorical versus metrical) on action selection, this thesis aimed to investigate the role of stimulus type in the formation of action files using metrical (luminance, duration, speed) and categorical (hue, shape) features in nine combinations in forced-choice and estimation tasks in which participants responded to the task-relevant feature with a keypress or mouse movement, respectively. Performance was analyzed based on the intertrial feature repetition/change. The results demonstrated that the inclusion of features in event files depends not only on task-relevancy and saliency, reaffirming the literature, but also on the type of stimulus feature (metrical versus categorical) and response (forced-choice versus continuous). In forced-choice tasks, categorical features were prioritized over metrical ones and only completely categorical stimuli varying in hue and shape showed a TEC-congruent pattern. Results from the estimation tasks could be explained by a common magnitude system in the dorsal visual stream.