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Related Experiment Video

Updated: Jun 17, 2026

The Impact of Motor Task Conditions on Goal-Directed Arm Reaching Kinematics and Trunk Compensation in Chronic Stroke Survivors
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The Impact of Motor Task Conditions on Goal-Directed Arm Reaching Kinematics and Trunk Compensation in Chronic Stroke Survivors

Published on: May 2, 2021

Action plans produce separate Simon effects for picking up and transporting objects.

James D Miles1, Jessica K Witt, Robert W Proctor

  • 1Department of Psychological Sciences, Purdue University, 703 Third St., W. Lafayette, IN 47907-2081, USA. jmiles@purdue.edu

Psychological Research
|December 19, 2009
PubMed
Summary
This summary is machine-generated.

This study explored how spatial stimulus-response (S-R) compatibility affects planning multi-reach actions. Results show cue-reach compatibility influences reaction time, with the initial reach being most dominant.

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09:11

Design and Use of an Apparatus for Presenting Graspable Objects in 3D Workspace

Published on: August 8, 2019

Area of Science:

  • Cognitive Psychology
  • Human-Computer Interaction
  • Robotics

Background:

  • Reaching to move objects is a fundamental human interaction.
  • Understanding spatial stimulus-response (S-R) compatibility is crucial for designing intuitive interfaces and robotic systems.
  • Multi-reach actions involve complex planning influenced by spatial cues.

Purpose of the Study:

  • To investigate the impact of spatial S-R compatibility on the planning of sequential reaching movements.
  • To determine how compatibility between a spatial cue and both initial and goal reaches affects action planning.
  • To identify the dominant factor influencing reaction time in multi-reach tasks.

Main Methods:

  • Participants performed a task involving an initial reach (picking up an object) and a goal reach (placing it in a container).
  • Spatial compatibility between a directional cue and the reach targets was manipulated across three experiments.
  • Reaction time for initiating the first reach was measured to assess planning efficiency.

Main Results:

  • Spatial compatibility between the cue and both the initial and goal reaches significantly affected reaction time.
  • The compatibility between the spatial cue and the initial reach demonstrated a dominant influence on planning.
  • Reaction times varied depending on whether reaches were on the same or opposite sides.

Conclusions:

  • Spatial S-R compatibility plays a significant role in the cognitive planning of sequential reaching actions.
  • The initial reach's spatial relationship to the cue is a primary determinant of planning efficiency.
  • Findings have implications for understanding human motor control and designing human-robot interaction systems.