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Why is the alphabetically middle letter in a multiletter array so hard to determine? Memory processes in linear-order
1Department of Psychology and Anthropology, University of Texas-Pan American, Edinburg 78539-2999, USA. jjou@Panam1.panam.edu
Journal of Experimental Psychology. Human Perception and Performance
|January 13, 1998
Summary
Participants identified letters in strings faster when they were at the alphabet's ends (A or C) than in the middle (B). This challenges existing search models, suggesting an inward construction process for linear order learning.
Area of Science:
- Cognitive Psychology
- Experimental Psychology
Background:
- Letter identification in multiletter strings is a fundamental cognitive process.
- Understanding search strategies and learning models is crucial for cognitive science.
Purpose of the Study:
- To investigate how participants identify target letters within multiletter strings.
- To examine the influence of alphabetical position and interletter distance on target identification speed.
- To test the validity of existing models of visual search and linear order learning.
Main Methods:
- Three experiments were conducted involving participants identifying target letters in strings with varying interletter distances.
- Reaction times for identifying extreme (e.g., A, C) versus interior (e.g., B) targets were recorded and analyzed.
Main Results:
- Alphabetically extreme targets were identified significantly faster than interior targets.
- The slowest identification times were observed for the alphabetically middle target.
- Observed distance effects were inconsistent across different target types, challenging standard models.
Conclusions:
- Findings do not align with established models like ends-inward serial search or comparison-based search.
- Data support a novel 'ends-inward construction theory' for linear-order learning.
- Suggests a cognitive process involving initial identification of terminal letters followed by inward construction of the linear order.
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