Effects of response force parameters on medial-frontal negativity.
The response-related medial-frontal activity (MFN) is often supposed to reflect action-monitoring and error-processing activity. The present force-production task was designed to investigate the effects of two response parameters (i.e., peak response force and time-to-peak, TTP) on the MFN separately. In a 2 × 2 design (high vs. low target force and short vs. long TTP), 22 participants had to produce isometric force pulses to match one of four conditions (e.g., a high target force with a long TTP). Significant main effects of both target force and target TTP were revealed. As previously shown, the MFN amplitude was higher in the high target-force condition than in the low target-force condition. Contrary to the initial expectations, a long TTP had the effect of reducing the MFN amplitude. There was no error-specific effect on the MFN. The force-unit monitoring model (FUMM) is suggested to account for the force- and TTP- specific variations of MFN amplitude, latency and slope.
Department of Psychology, University of Cologne, Cologne, Germany.
Anne-Simone
AS
Armbrecht
Henning
H
Gibbons
Jutta
J
Stahl
D000328:Adult; D004569:Electroencephalography; D005260:Female; D006179:Gyrus Cinguli / Q000502:physiology*; D006801:Humans; D007537:Isometric Contraction / Q000502:physiology; D011597:Psychomotor Performance / Q000502:physiology*; D011930:Reaction Time / Q000502:physiology*