Dichotic Interaural Intensity Difference (DIID) training: a review of existing research and future directions.
Dichotic Interaural Intensity Difference (DIID) training was designed to address deficits in dichotic processing. The present review describes the theoretical and physiologic bases for this procedure, highlighting the available efficacy data that are currently available. Additionally, a new approach to the DIID (i.e., DIID II) is presented in which interaural timing deficits are utilized during training instead of interaural intensity differences (IIDs). The DIID II is considered in light of available research present on the dichotic lag effect and potential advantages it may provide, over the classic DIID protocol, in cases of peripheral hearing loss..