Deborah Ross-Swain, Nancy Long
The APAT is a norm-referenced auditory processing battery designed to screen children ages 5-0 through 12-11. It may be used in the identification of children who are at risk or who may experiencing Auditory Processing Disorder (APD). The APAT was developed using a model based on a hierarchy of auditory processing skills that are basic to listening and processing spoken language. These skills range from sensation to memory to cohesion.
The APAT is comprised of 10 subtests that quantify a child's performance in various areas of auditory processing:
The test takes 45 minutes to administer and provides composite index scores as well as individual subtest scores:
The battery is designed primarily to be used by speech-language pathologists but may also be used by other professionals such as learning disabilities specialists, psychologists, and resource specialists.
Internal consistency measures are relatively high: across all ages, Cronbach's Coefficient Alpha for subtest items ranges from 0.70 to 0.89; Spearman-Brown Correlations range from 0.75 to 0.93. Subtest SEMs are relatively low, ranging from 0.79 to 1.51 across all ages. Criterion-related validity coefficients are moderately high; the correlation between subtest scores from APAT Phonemic Awareness and LAC-II is 0.54, while the correlation between percentile ranking of APAT Total and LAC Total is 0.53. (Because the LAC provides only composite scores that assess a number of skills and APAT individual subtest scores reflect discrete skills, correlations are lower than if one were comparing two discrete sets of similar skills.)
The APAT is individually administered and can be completed and scored in less than 45 minutes. It yields scaled scores and percentile ranks for subtests and standard scores and percentile ranks for the composites. Age equivalents are also available for all areas assessed.