Target-set and response-set interaction: implications for models of human information processing

Area of Science:

• Cognitive Psychology
• Human Factors

Background:

• Binary character-classification tasks commonly show increased reaction time with more target elements.
• Previous research indicates a substantial rise in response times as the number of targets grows.

Purpose of the Study:

• To investigate the effect of target set size on reaction time in binary character-classification tasks.
• To examine if reaction time is independent of target set size under specific conditions.

Main Methods:

• Participants performed binary character-classification tasks.
• The size of the familiar target set was manipulated (one to three elements).
• Explicit "no" responses were not required.

Main Results:

• Reaction time did not significantly increase as the target set size grew from one to three.
• This finding contrasts with typical observations in similar tasks.

Conclusions:

• Familiarity of the target set and the absence of explicit "no" responses can mitigate the expected increase in reaction time.
• Cognitive load or decision-making processes may be less affected by target set size under these specific experimental conditions.