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Lexical Decision Task for Studying Written Word Recognition in Adults with and without Dementia or Mild Cognitive Impairment

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Triadic decision making in lexical memory.

D Homa¹, R Silver

¹Department of Psychology, Arizona State University, 85281, Tempe, Arizona.

Memory & Cognition

|February 3, 2011

Summary

This summary is machine-generated.

Category decisions take longer than word decisions. Word recognition benefits from category membership, while category recognition is sensitive to semantic distances between words.

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Area of Science:

Cognitive Psychology
Psycholinguistics
Semantics

Background:

Understanding word and category recognition is crucial for cognitive science.
Semantic distance influences how we process and categorize information.
Previous research has explored lexical decision-making and semantic priming.

Purpose of the Study:

To investigate the cognitive processes underlying word recognition versus category recognition.
To examine the role of semantic distance in both word and category decision tasks.
To compare the time course and influencing factors of word and category decisions.

Main Methods:

Participants performed word and category recognition tasks with three-letter strings.
Semantic distances between words were derived using multidimensional scaling.
Response times were measured for positive responses in both conditions.

Main Results:

Category decisions were 150-200 msec slower than word decisions.
Word decisions were facilitated by shared category membership, with intra-category semantic distance being less critical.
Category decisions were systematically affected by intra-category semantic distances.

Conclusions:

Semantic distance plays a differential role in word versus category recognition.
Categorical decisions appear to involve a sensitization to semantic relationships, particularly larger distances.
Word decisions are primarily driven by categorical membership, with finer semantic distinctions having less impact.