Tricia Helfer on [Petrus Johannes Waardenburg (1886-1979), Dutch ophthalmologist WAB 1. abbreviation for WEIGHTED APPLICATION BLANK. 2. abbreviation for western aphasia battery. Wada test a technique for determining hemispheric functions, typically memory and language, by injecting a small dose of a barbiturate into the carotid artery on one side of the head. This procedure selectively impairs the cerebral hemisphere on the injected side for 10 to 15 minutes. While each hemisphere is separately anesthetized, various cognitive tasks are administered; impairments on these tasks suggest that these functions are represented in the anesthetized hemisphere. Tricia Helfer 2016.