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ERIC Number: EJ909022
Record Type: Journal
Publication Date: 2010-Nov
Pages: 10
Abstractor: As Provided
Reference Count: 18
ISSN: ISSN-1058-0360
Group-Item and Directed Scanning: Examining Preschoolers' Accuracy and Efficiency in Two Augmentative Communication Symbol Selection Methods
White, Aubrey Randall; Carney, Edward; Reichle, Joe
American Journal of Speech-Language Pathology, v19 n4 p311-320 Nov 2010
Purpose: The current investigation compared directed scanning and group-item scanning among typically developing 4-year-old children. Of specific interest were their accuracy, selection speed, and efficiency of cursor movement in selecting colored line drawn symbols representing object vocabulary. Method: Twelve 4-year-olds made selections in both directed and group-item scanning conditions using a 36-symbol array that required matching line drawn symbols to pictures. Results: The majority of participants took more time in the directed scanning condition. Though not statistically significant, participants tended to be more accurate in their use of directed scanning. The cursor movements required (as a proportion of optimal cursor movements) were similar for both scanning selection techniques. Conclusions: Among typically developing 4-year-olds, there appears to be a trade-off between speed and accuracy in symbol selection when using directed or group-item scanning. Better accuracy with directed scanning appears to come at the cost of a slower response time. Whereas group-item scanning may be faster, it results in a decreased number of accurate responses. Applications for clinical practice and implications for future research are discussed. (Contains 3 tables, 2 figures, and 2 footnotes.)
American Speech-Language-Hearing Association (ASHA). 10801 Rockville Pike, Rockville, MD 20852. Tel: 800-638-8255; Fax: 301-571-0457; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Research
Education Level: Preschool Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A