Effects of relaxation training on fear and arousal during in vivo exposure to a caged snake among DSM-III-R simple (snake) phobics.

Eight pairs of DSM-III-R snake phobic subjects (Ss) were exposed to a caged snake while seated in front of a package-conveyor apparatus during eight 4-minute trials. Heart rates and skin-conductance levels were recorded before and during each of the eight trials. Self-reports of fear were obtained after each trial. One S in each pair controlled the conveyor on alternating trials. One subject (S) in each pair had received a representative regimen of relaxation training beforehand. Heart-rate decreased more in Ss controlling the conveyor than in their yoked partners. Ss who had received relaxation training showed lower heart-rate change, lower skin-conductance change, and lower self-reports of fear after the exposure trials. Relaxed Ss also moved the snake closer to themselves than did unrelaxed subjects on some trials.