Exact(6)
This might be due to the specificity of the prepared grasping action, which was known before the appearance of the go-cue on screen in the study by Craighero et al. Therefore, this effect could also be related to a feed-forward process that perceives cues congruent to the instructed action in an enhanced way, rather than movement preparation effects that improve orientation perception.
It has been contrasted to instructed action, in which actions are fully specified by external stimuli.
Then, following a delay period, they performed the instructed action (with the hand or tool, depending on the experimental run).
We have investigated the relation between the classic operational definitions of free and instructed action and the subjective feeling of acting freely.
These findings are consistent with existent report of free action > instructed action contrasts (Cunnington et al., 2006; Lau et al., 2004, 2006).
Crucially, in two separate analyses, we compared extreme situations of free and instructed action as operationalized by the classical objective paradigms, and also situations in which actions subjectively felt more free or felt more constrained, based on self-report.
Similar(54)
In this operationalization, instructed actions are fixed, yet possibly arbitrary, associations of stimuli with movements.
Neuroscientific studies have often defined volition by drawing a distinction between the information-processing underlying free and instructed actions.
Trials in the subjective context represent an intermediate situation, between the two objective extremes of free and instructed actions.
Typically in instructed actions, both the timing and type of action are explicitly specified (the when and what of action (Brass & Haggard, 2008)).
BOLD activity associated with voluntary choice as identified by subjective report did not match with that identified by a classical contrast between free and instructed actions.
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