APA Dictionary of Psychology

an assessment technique that observes an individual approach a feared situation until they are unable to go further. The BAT is used to assess levels of avoidance and fear of specific situations associated with phobias. It may also be used to corroborate information obtained in the clinical interview and to measure treatment progress and outcome. Variables that can be measured using the BAT include physical symptoms (e.g., increased heart rate), escape or avoidance strategies, and subjective ratings of fear. Also called behavioral approach test; behavioral avoidance test.