We included three signal-to-noise (S/N) ratios in the SCAN-3 battery to determine the progression of children’s ability to hear in noise from “easy” to “very difficult.” In fact there were four S/N ratios earlier in the revision process but standardization studies found that the +4 dB S/N ratio did not add to the results, and it was removed in order to save examiner time. Why are there 3 S/N (signal-to-noise) ratios on the SCAN-3? How do I use them? The original SCAN test, published in the 1980s, was considered just a screening measure. Further, most audiologists recognize that both SCAN-C and SCAN-A (the previous test versions) were diagnostic procedures that included four tests validated in previous studies of patients with confirmed central auditory lesions. Overall, the nine tests of the SCAN-3 test batteries include all of the behavioral measures recommended in the recent Guidelines for the Diagnosis, Treatment, and Management of children and adults with central auditory processing disorder published in 2010 by the American Academy of Audiology. The SCAN-3 diagnostic tests include standard scores with percentile ranks and confidence intervals that are important in the interpretation of test results. The criterion-referenced norms provide cut scores for determining pass/fail of the screening measures. If an examinee fails the screening tests, or if there is a referral for diagnostic testing, then the audiologist can proceed with the diagnostic portion of the test. SCAN-3 contains three screening measures that can be used to determine if the entire battery should be administered. Purpose and UseĪre the SCAN-3 tests (both Children and Adolescents/Adults) screening or diagnostic tests? The following resources are available for SCAN-3:C.įrequently asked questions follow.

Auditory Figure Ground (+0 dB and +12 dB) and Time Compressed Sentences.Competing Sentences: provides information about the maturation of the auditory nervous system.Competing Words (Directed Ear): dichotic listening task that indicates a child’s auditory maturation or developmental level.Filtered Words: indicates ability to process speech when the signal is distorted or compromised by a poor acoustic environment.Competing Words (Free Recall): dichotic listening task (poor performance may indicate lack of maturation or abnormality of the auditory nervous system).Auditory Figure Ground (+8dB): tests ability to listen with background noise.Gap Detection: indicates presence of a temporal processing problem which may influence the ability to comprehend running speech.The SCAN-3 test battery includes screening tests, diagnostic tests, and supplementary tests, including: Updated norms and continuous normative scores are provided across SCAN-3 Child and Adolescent/Adult editions.Develop strategies to assist the child in managing auditory processing difficulties at school, at home, and in the community.Obtain information to help differentiate an auditory processing disorder from auditory attention problems and auditory comprehension difficulties.Screen and diagnose auditory processing difficulties with one co-normed battery of tests.

Adult auditory processing disorder test