Exploring the impact of temporally contiguous action effect on action control performance in typical development and attention-deficit/hyperactivity disorder.

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Previous work shows a reinforcing impact of action effect on behavior, independent of other reinforces such as positive outcomes or task success. Action-effect temporal contiguity plays an important role in such a reinforcing effect, possibly indicating a motor-based evaluation of their causal relationship. In the present study, we aimed to negate the reinforcing impact of an immediate action effect with task success by designing a task where red and green circle stimuli rapidly descended on the screen. Participants were instructed to respond only when a specific sequence of colored stimuli matched a predefined response rule. The temporal contiguity between the response and a perceptual effect was manipulated. We initially hypothesized an increased action tendency resulting in higher false alarm rates in the immediate (compared to 400 ms lag) action-effect condition. We also expected this pattern to be more pronounced in attention-deficit/hyperactivity disorder compared to typically developing individuals. Contrary to our expectations, results from three experiments showed a consistent pattern of a lower false alarm rate in the immediate compared to the 400 ms lag effect condition across both attention-deficit/hyperactivity disorder and typically developing groups. Additionally, while action-effect temporal contiguity did not significantly alter the overall rate of misses, we observed earlier improvements in both misses and false alarms in the immediate condition during the first blocks. Possible explanations for the complex impact of action effect on action tendency and action control are discussed. (PsycInfo Database Record (c) 2024 APA, all rights reserved).