Switching and clustering in verbal fluency tasks throughout childhood
Gitit Kave1, Sharon Kigel, Rotem Kochva
1Department of Communication Disorders, Tel Aviv University, Tel Hashomer, Israel 52621. gkave@012.net.il
Journal of Clinical and Experimental Neuropsychology
|September 14, 2007
Summary
This study on Hebrew speakers aged 8-29 found that word retrieval skills, including switching and clustering, improve with age. Development appears linked to executive search strategies rather than vocabulary growth.
Area of Science:
- Psycholinguistics
- Developmental Psychology
- Cognitive Neuroscience
Background:
- Word retrieval is crucial for fluent communication.
- Understanding the developmental trajectory of word retrieval is essential for identifying potential deficits.
Purpose of the Study:
- To analyze switching and clustering in phonemic and semantic fluency tasks across different age groups.
- To investigate the relationship between age and word retrieval efficiency in Hebrew speakers.
Main Methods:
- Data collected from 180 Hebrew speakers aged 8-29.
- Analysis of phonemic and semantic fluency tasks, measuring total output, number of switches, and number of clusters.
- Comparison of performance across age groups, including children, adolescents, and adults.
Main Results:
- Phonemic task: Total output, switches, and clusters increased with age; mean cluster size did not.
- Semantic task: All measures (output, switches, clusters) increased with age.
- Adolescents and adults showed no phonemic differences, but adults had more semantic switches than adolescents.
Conclusions:
- Word retrieval development is significantly influenced by age.
- Maturation of executive search strategies appears more critical for word retrieval than lexical enrichment.
- Findings suggest a shift towards more efficient cognitive search processes with age.
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