The Dichotic Digits difference Test (DDdT): Development, Normative Data and Retest Reliability Studies
Date
2015-08Author
Cameron, Sharon
Glyde, Helen
Dillon, Harvey
Whitfield, Jessica
Seymour, John
Metadata
Show full item recordAbstract
Background: The dichotic digits test is one of the most widely used assessment tools for
central auditory processing disorder (CAPD). However, questions remain concerning the
impact of cognitive factors on test results.
Purpose: To develop the Dichotic Digits difference Test (DDdT), an assessment tool which
could differentiate children with cognitive deficits from children with genuine dichotic
deficits based on differential test results. The DDdT consists of four subtests: dichotic free
recall (FR), dichotic directed left (DLE) and right ear (DRE), and diotic. Scores for six
conditions are calculated (Free Recall LE, RE and total, as well as the DLE, DRE and diotic).
Scores for four difference measures are also calculated: Dichotic advantage, Right Ear
Advantage (REA) FR; REA Directed and Attention Advantage.