Partial repetition between action plans delays responses to ideomotor compatible stimuli

Fournier, Lisa R.; Richardson, Benjamin

doi:10.1007/s00426-021-01491-9

Cited by 4 publications

(1 citation statement)

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“…To date, PRCs are typically observed for intervening actions that are newly learned and have arbitrary S-R mappings. There is some evidence that the size of PRCs may be reduced when action plans generated offline impose less of a demand on WM (e.g., word reading, Fournier et al, 2010 ; stimuli are ideomotor compatible, Fournier & Richardson, 2021 ; or individuals have higher WM spans, Fournier et al, 2014a ; Behmer & Fournier, 2014 ). The present experiment tested the long-term memory hypothesis , asking whether PRCs can be eliminated for extensive practice with individual action plans.…”

Section: Introductionmentioning

confidence: 99%

Partial Repetition Costs are Reduced but not Eliminated with Practice

Fournier

Richardson

Logan

2022

Journal of Cognition

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Often, we depart from an intended course of events to react to sudden situational demands (an intervening event) before resuming the originally planned action. Executing an action to an intervening event can be delayed if the features of this action plan partly overlap with an action plan retained in working memory (WM) compared to when they completely overlap or do not overlap. This delay is referred to as a partial repetition cost (PRC). PRCs are typically attributed to code confusion between action plans in WM. We tested this by training the component action plans extensively to reduce their reliance on WM. If PRCs are caused by code confusion within WM, then PRCs should be reduced and possibly eliminated with extensive practice. To test this, participants performed a partial repetition (PR) task after 0, 4 and 8.5 sessions of stimulus-response (S-R) training. In the PR task, participants saw two visual events. They retained an action to the first event while executing a speeded action to a second (intervening) event; afterwards, they executed the retained action. The two action plans either partly overlapped or did not overlap. Results showed that extensive (S-R and PR task) practice reduced but did not eliminate PRCs. A reduction in PRCs (code confusion) with practice is compatible with memory models that assume action events become more specific and less reliant on WM with practice. These findings merit expansions of PR tasks to other domains and broader conceptions of action plans that incorporate the formal structure of memory models.

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Section: Introductionmentioning

confidence: 99%

Partial Repetition Costs are Reduced but not Eliminated with Practice

Fournier

Richardson

Logan

2022

Journal of Cognition

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Action imitation via trajectory-based or posture-based planning

Barhorst-Cates

Isaacs

Buxbaum

et al. 2022

Human Movement Science

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Action imitation via trajectory-based or posture-based planning

Barhorst-Cates

Isaacs

Buxbaum

et al. 2020

Preprint

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Movement imitation is a significant daily activity involved in social interaction and motor learning. Although imitation remains poorly understood, recent research suggests that it may be achieved in two distinct ways. In posture-based imitation, movements reproduce how the body should look and feel, and are sensitive to the relative positioning of body parts. In trajectory imitation, movements mimic the spatiotemporal motion path of the end effector. We hypothesized that people can imitate via either mechanism. If true, we would expect to see a switch cost when individuals change from one mechanism to the other. To test this, twenty-five healthy young adults performed a sequential multitasking imitation task. Participants were first instructed to pay attention to the limb postures or the hand path of a video-recorded model. They next performed an intervening motor task that was neutral, congruent, or incongruent with the instructed imitation type. Finally, participants imitated the modeled movement. Spatiotemporal imitation accuracy was greatest after a neutral intervening task, and worst after posture matching. When the primary task involved imitating trajectories, we observed a switch cost: movements following the posture-matching intervening task were less consistent with baseline (neutral) performance, suggesting performance was disrupted by the incongruence. Incongruent primary and intervening tasks also reduced cross-subject consistency. Such effects were not observed when imitating limb postures. In summary, we observed a partial dissociation between posture matching and trajectory imitation as a result of instructions and intervening tasks that is nevertheless consistent with the existence of two computationally distinct imitation mechanisms.

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Partial repetition between action plans delays responses to ideomotor compatible stimuli

Cited by 4 publications

References 67 publications

Partial Repetition Costs are Reduced but not Eliminated with Practice

Partial Repetition Costs are Reduced but not Eliminated with Practice

Action imitation via trajectory-based or posture-based planning

Action imitation via trajectory-based or posture-based planning

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