The Random Gap Detection Test-Standard (RGDT) is an auditory processing disorder test for ages 5 and up using non-verbal stimuli. It is considered a temporal test using temporal resolution and is sensitive to cortical particularly left temporal lobe lesions.
This test is a variation on the AFT-R. It differs from the AFT-R: First, in the AFT-R, the stimulus presentations are in serial order from no gap to large gap and back to no gap, often resulting in perseveration in some subjects. Since randomization successfully eliminates the problem of perseveration, the RGDT gap duration presentations of the stimuli are randomized. Second, the number of test frequencies has been reduced to four. Third, Click stimuli have been added.
The Random Gap Detection Test-Standard (RGDT) includes a) audio recording, and b) manual and score forms as printable pdf files. The 31-page manual is comprised of sections on development, background, administration, and interpretation. It includes normative data for ages 5 to 11. It would be reasonable to expect children over the age of eleven to test as well (or nearly as well) as adults. (Normative values for the AFT-R are included for ages 5-70 due to their similarity.) Available from Auditec, Inc. Call 1-800-669-9065 (from US) or 314-416-1050 (outside the US) to order. FREE shipping to contiguous US locations.
- NCAP Battery includes Duration Pattern Sequence, Pitch Pattern Sequence – Adult & Child Versions, Random Gap Detection Test-Standard & Expanded Versions, and Masking Level Difference-Tone Version; Item CD117-9; Price $329.75 USD+ S&H
- ACAP Battery includes Dichotic Digits, Duration Pattern Sequence, Dichotic Word Listening Test, Masking Level Difference-Tone, NU-6 Low Pass Filtered at 750 Hz, Time Compressed Sentence Test, Random Gap Detection Test-Standard, Selective Auditory Attention Test, and Competing Sentences combined on one CD; Item CD115-9; Price $549.00 USD + S&H
*Administrators who are interested in measuring improvement in temporal processing abilities following remediation should purchase the RGDT-Standard & Expanded version instead.