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Testing Tactile Masking between the Forearms

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Laterality differences and practice effects under central backward masking conditions.

T B Ward¹, L E Ross

¹Department of Psychology, University of Wisconsin, 53706, Madison, Wisconsin.

Memory & Cognition

|November 9, 2013

Summary

This summary is machine-generated.

A right visual field advantage in visual processing diminishes with practice, especially for females. Performance significantly improves across testing sessions due to strategy development.

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Area of Science:

Cognitive psychology
Visual perception
Neuroscience

Background:

Laterality in visual processing, specifically the right visual field (RVF) advantage, is a known phenomenon.
Central backward masking is a technique used to study visual processing limitations.

Purpose of the Study:

To investigate laterality differences and practice effects in visual processing under central backward masking.
To determine the critical stimulus onset asynchrony (SOA) for letter identification across three days.

Main Methods:

Two experiments were conducted using single letters as target stimuli (TS) and a pattern masking stimulus (MS).
Subjects were tested over three consecutive days to assess practice effects and changes in visual field advantages.
Critical stimulus onset asynchrony (SOA) was measured to quantify processing efficiency.

Main Results:

An initial right visual field (RVF) advantage was observed on Day 1.
This RVF advantage disappeared on subsequent days, indicating a practice effect.
The decline in the RVF advantage was linked to prior experience with letters, not specific letter sets, and was more pronounced in females.
Significant performance improvements were noted, particularly between the first and second sessions.

Conclusions:

The findings suggest that practice and prior experience with visual stimuli can alter or eliminate initial laterality advantages.
Practice effects may involve the development of strategies to enhance target stimulus (TS) perception or reduce masking stimulus (MS) interference.
Gender differences in the rate of decline of the RVF advantage warrant further investigation.