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Statistical Significance

Statistical Significance

Once data is collected from both the experimental and the control groups, a statistical analysis is conducted to find out if there are meaningful differences between the two groups. A statistical analysis determines how likely any difference found is due to chance (and thus not meaningful). In psychology, group differences are considered meaningful, or significant, if the odds that these differences occurred by chance alone are 5 percent or less. Stated another way, if we repeated this...

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Related Experiment Video

Updated: Apr 21, 2026

Eye Tracking During Visually Situated Language Comprehension: Flexibility and Limitations in Uncovering Visual Context Effects

Eye Tracking During Visually Situated Language Comprehension: Flexibility and Limitations in Uncovering Visual Context Effects

Published on: November 30, 2018

Statistical extraction affects visually guided action.

Jennifer E Corbett¹, Joo-Hyun Song²

¹University of Trento, Center for Mind/Brain Sciences ; Brown University, Department of Cognitive, Linguistic, and Psychological Sciences.

Visual Cognition

|November 11, 2014

Summary

This summary is machine-generated.

The visual system adapts to average object sizes, influencing early grasping movements. This mean size adaptation affects both perception and action, showing how ensemble statistics guide interactions.

Keywords:

Adaptation aftereffect Ensemble statistics Mean size Visually guided action

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Area of Science:

Cognitive Science
Neuroscience
Visual Perception

Background:

The visual system processes ensemble statistics, like average size, similar to basic visual properties.
Previous research indicated mean size adaptation influences perception.

Purpose of the Study:

To investigate the role of mean size adaptation in visually guided grasping.
To explore how ensemble statistics influence both perception and action during object interaction.

Main Methods:

Participants adapted to dot ensembles with varying mean sizes.
Grasping movements and subsequent perceptual judgments were analyzed post-adaptation.

Main Results:

Grip aperture during early grasping was inversely related to the adapted mean dot size.
The kinematic aftereffect diminished as the grasp neared completion.
Perceptual judgments retained a significant aftereffect even after veridical grasping.

Conclusions:

Mean size is fundamentally encoded in both perception and action domains.
Ensemble statistics influence not only object perception but also physical interactions with the environment.