Collected data on direct experiences of students during insight meditation (vipassana), in which concentration is focused on breathing and somatic functions. Questionnaire responses suggested that unusual visual and auditory aberrations were the norm. Meditation may be viewed as a series of mental exercises in which "mindfulness" is more than a process of simple relaxation. (13 ref) (PsycINFO Database Record (c) 2017 APA, all rights reserved)