Abstract
Whereas ideomotor approaches to action control emphasize the importance of sensory action effects for action selection, motivational approaches emphasize the role of affective action effects. We used a game-like experimental setup to directly compare the roles of sensory and affective action effects in selecting and performing reaching actions in forced- and free-choice tasks. The two kinds of action effects did not interact. Action selection and execution in the forced-choice task were strongly impacted by the spatial compatibility between actions and the expected sensory action effects, whereas the free-choice task was hardly affected. In contrast, action execution, but not selection, in both tasks was strongly impacted by the spatial compatibility between actions and highly valued action effects. This pattern suggests that sensory and affective action effects serve different purposes: The former seem to dominate rule-based action selection, whereas the latter might serve to reduce any remaining action uncertainty.
Highlights
Whereas ideomotor approaches to action control emphasize the importance of sensory action effects for action selection, motivational approaches emphasize the role of affective action effects
For the three postinitiation measures (MT, AUC, and MAD), this effect was modified by task, indicating that, the sensory action–effect compatibility (AEC) effect was restricted to the forced-choice task, and not significant in the free-choice task: MT, F(1, 34) = 10.16, p = .003, ηp2 = .230; AUC, F(1, 34) = 8.66, p = .006, ηp2 = .203; MAD, F(1, 34) = 11.34, p = .002, ηp2 =
We found no indication of any direct interaction between sensory and affective AEC, which supports the assumption of Eder et al
Summary
Whereas ideomotor approaches to action control emphasize the importance of sensory action effects for action selection, motivational approaches emphasize the role of affective action effects. Satiation failed to reduce cue-elicited food-seeking when food-associated stimuli were presented in a transfer test Taken together, these two studies converge in suggesting that, if both sensory and affective action consequences are varied, the expected sensory consequences drive action selection in forced-choice tasks, whereas the expected affective consequences drive action selection in free-choice tasks. Dignath, Pfister, Eder, Kiesel, and Kunde (2014) reported a similar observation for affective action effects: Movements toward negatively rewarded objects showed systematic deviations toward positively rewarded objects, even if none of the rewards was visible during the reaching action Both anticipated sensory and anticipated affective action effects have been demonstrated to leave their fingerprints on the trajectories of reaching responses, even though the action effects were not present during action planning and execution
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