An implication from these data is that discrimination training: Percent 50 total responses 40 Standard training S(1,000-Hz tone) R (key peck) +0 (food) !! 30 20 Discrimination training S(1.000-Hz tone)+R (key peck) +0 (food) S (950-Hz tone) +R (key peck)+0 ino food) 10 300 450 670 1,000 1,500 2,250 3,500 Tonal frequency (in Hertz) broadens responding to more stimuli slows down learning sharpens sensitivity to the stimulus has no effect on responses speeds responses