Decision making
Do priors reshape motor preparation before you act?
Open access · cc by · source: Europe PMC
In 62 adults, probabilistic cues biased decisions and inhibited prior-incongruent motor cortex excitability; MEP modulators vs non-modulators tracked believer vs empiricist styles.
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Do priors reshape motor preparation before you act?
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62 participants (37 female, 18–32).
62 participants (37 female, age range 18–32) took part in the study
Significant cue effect on response criterion.
Signal detection theory (SDT) analysis ( Figure 2 A) revealed a significant cue effect on response criterion (i.e., the tendency to respond “right” or “left”; F 2,122 = 37.96
Key findings
Cues shifted decision criterion; prior expectations inhibited motor regions coding incongruent responses; trial-by-trial MEPs related to bias; schizotypal/autistic traits linked to believer/empiricist styles.
Methodology
Participants did an RDM discrimination task with informative/uninformative cues while bilateral M1 TMS elicited MEPs at multiple peri-stimulus times.
Limitations
Not a clinical treatment study; styles are correlational with traits, not diagnostic categories.
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