The effect of targets in defilade on the search task

Perception experiments were conducted at Night Vision and Electronic Sensors Directorate (NVESD) to investigate the effect of targets in defilade on the search task. Vehicles were placed in a simulated terrain and were either fully exposed, partially exposed, or placed in hull defilade. These images, along with a number of no-target images, were presented in a time-limited search perception experiment using military observers. The results were analyzed and compared with ACQUIRE predictions to determine if there are factors, other than size, affecting the search task when targets are in defilade.