“…With these Ss, then, the primary determinant of responsiveness to ICS remains that portion of the variance attributable to a S factor, which in turn is most likel~ related to variations in exact stimulation. This conclusion of the overwhelming importance of exact stimulation to the determination of exact responsiveness for ICS is the same conelusion that other data have indicated (e.g., West et al, 1971;Westcott, Reid, & Wasden, 1969).…”