Motor Program Transformation of Throwing Dart from the Third-Person Perspective

Area of Science:

• * Cognitive Psychology
• * Human-Computer Interaction
• * Motor Control

Background:

• * Perceptual perspective influences action execution.
• * Virtual reality (VR) offers novel ways to study self-perception and action.

Purpose of the Study:

• * Investigate how first-person vs. third-person perspectives in VR affect dart-throwing accuracy.
• * Analyze kinematic changes associated with different visual perspectives during a motor task.

Main Methods:

• * 28 subjects performed dart throws using a virtual reality head-mounted display (VR HMD).
• * Third-person perspectives were simulated using video feeds from cameras positioned behind the subjects at varying angles.
• * Motion capture recorded hand displacement, velocity, acceleration, and torso rotation.

Main Results:

• * Accuracy shifted based on camera location, with horizontal shifts aligning with camera movement and vertical shifts opposing it.
• * Third-person perspectives led to reduced torso rotation, lower movement amplitude, speed, and acceleration compared to first-person.
• * Smaller hand movement angles in third-person views predicted changes in throwing accuracy.

Conclusions:

• * Subject localization within a virtual environment significantly transforms motor programs.
• * Altering visual perspective in VR impacts both the accuracy and kinematics of physical actions.