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Related Experiment Video

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The "Motor" in Implicit Motor Sequence Learning: A Foot-stepping Serial Reaction Time Task
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Arousal and exposure duration affect forward step initiation.

Daniëlle Bouman1, John F Stins1, Peter J Beek1

  • 1Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, Vrije Universiteit Amsterdam, MOVE Research Institute Amsterdam , Netherlands.

Frontiers in Psychology
|November 19, 2015
PubMed
Summary
This summary is machine-generated.

Emotion and viewing duration significantly impact movement. Longer viewing times reduce step length and velocity, while arousal, not valence, affects gait initiation, suggesting arousal is a stronger influence than emotion type.

Keywords:
affectarousalemotionexposure durationforward gait initiation

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Area of Science:

  • Psychology
  • Neuroscience
  • Biomechanics

Background:

  • Emotion influences goal-directed movements, with prior research showing varied effects of stimulus valence and viewing duration on approach behaviors.
  • The impact of stimulus viewing duration on whole-body approach movements, particularly in relation to emotional valence, remains under-investigated.

Purpose of the Study:

  • To investigate how viewing duration and emotional arousal/valence affect kinematic parameters during forward gait initiation.
  • To determine whether stimulus arousal or valence is a stronger predictor of changes in gait initiation.

Main Methods:

  • Participants initiated forward steps after viewing neutral, high-arousal pleasant, or high-arousal unpleasant stimuli.
  • Stimulus viewing durations varied across seven levels (100–4000 ms), with valence and arousal scores collected.
  • Kinematic parameters of gait initiation, including step length, peak velocity, and reaction time, were analyzed.

Main Results:

  • Both viewing duration and stimulus arousal significantly influenced gait initiation kinematics.
  • Longer viewing durations reduced step length and peak velocity for all stimuli.
  • Reaction time decreased for emotional stimuli but increased for neutral stimuli with longer viewing durations.
  • No significant differences were observed between pleasant and unpleasant stimuli, indicating arousal, not valence, drove the kinematic changes.

Conclusions:

  • Arousal level, rather than emotional valence, is a key factor influencing gait initiation parameters.
  • Extended viewing durations may decrease alertness, impacting movement kinematics.
  • Findings challenge existing theories of approach motivation, highlighting the nuanced role of arousal and viewing time.