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In structural engineering, the equilibrium of a system is not only determined by its equations of equilibrium but also with the help of constraints. Constraints refer to restrictions on the motion of a system. The proper combinations of constraints can minimize the total number of constraints needed to maintain a system in mechanical equilibrium. When this happens, the system is said to be statically determinate. For such systems, the unknown reaction supports can be estimated using equilibrium...
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Related Experiment Video

Updated: Jun 4, 2026

The (Spatial) Memory Game: Testing the Relationship Between Spatial Language, Object Knowledge, and Spatial Cognition
05:15

The (Spatial) Memory Game: Testing the Relationship Between Spatial Language, Object Knowledge, and Spatial Cognition

Published on: February 19, 2018

Static versus dynamic judgments of spatial extent.

Marc Hurwitz1, Derick Valadao, James Danckert

  • 1Department of Psychology, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L3G1, Canada.

Experimental Brain Research
|February 1, 2011
PubMed
Summary
This summary is machine-generated.

Scanning influences spatial judgments differently for eyes and pointing. Dynamic scanning affects bisection biases by speed and direction, unlike static judgments, suggesting distinct neural processes for spatial extent computation.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Perception

Background:

  • Research on scanning's effect on spatial extent judgments yields inconsistent findings.
  • Understanding how visual scanning impacts spatial perception is crucial for cognitive and neuroscience research.

Purpose of the Study:

  • To investigate how scanning behavior influences line bisection judgments.
  • To compare ocular and pointing behaviors during static and dynamic spatial judgments.
  • To determine the impact of scanning parameters (length, position, speed, acceleration, direction) on spatial perception.

Main Methods:

  • Four experiments were conducted using line bisection tasks.
  • Ocular and pointing behaviors were meticulously measured.
  • Key variables manipulated included line length, position, scanning speed, acceleration, and direction.

Main Results:

  • Ocular and pointing judgments exhibited distinct patterns.
  • Static judgments showed sensitivity to line position and length for ocular behavior, less so for pointing.
  • Dynamic judgments revealed that scanning speed influenced bisection biases, but not acceleration. Both ocular and pointing results varied with scan direction.

Conclusions:

  • Static and dynamic spatial judgment tasks appear to engage different cognitive processes.
  • Significant differences between static and dynamic bisection suggest distinct neural mechanisms for computing spatial extent in ocular versus pointing tasks.