A wide variety of behavioral methods has been employed with animals to assess visual changes induced by drugs or toxicants. The methods range from simple to complex, from broad screening devices to narrowly focused techniques. Their relative advantages for the environmental toxicologist are discussed. Manipulation of stimulus values is an essential ingredient in the identification of specific s...

Current questions about lead exposure focus on the consequences of levels too low to have erupted into blatantly discernible defects. The present paper addresses two sets of interrelated problems derived from this issue. One is how to define the behavioral consequences of asymptomatic lead absorption, and the second focuses on behavioral assessment procedures. Current primary prevention program...

Behavioral Relaxation Training (BRT), a set of ten overt behaviors directly taught by prompting and performance feedback, was compared with frontalis EMG Biofeedback (BIO), Progressive Muscle Relaxation (PMR), and a Music "attention focusing" (MUS) control, on five dependent measures of relaxation, in four groups of volunteers for a "stress-reduction" project. The dependent measures consisted o...