Table 3.

Results for tact training, listener training, and listener/intraverbal categorization training (familiar stimuli)

Participant	Tact training	Listener training	Listener/intraverbal categorization training
Doug	95 trial blocks (M = 23) 4 sets 32 stimuli	8 trial blocks (M = 2) 4 sets 32 stimuli	2 trial blocks No errors with either categorization type Emitted an echoic and a tact during a listener categorization triala
Sophie	122 trial blocks (M = 26) 5 sets 40 stimuli	5 trial blocks (M = 1) 5 sets 40 stimuli	3 trial blocks Errors with intraverbal categorization
Alex	139 trial blocks (M = 35) 4 sets 32 stimuli	7 trial blocks (M = 2) 4 sets 32 stimuli	2 trial blocks Errors with intraverbal categorization
Rick	92 trial blocks (M = 23) 4 sets 32 stimuli	4 trial blocks (M = 1) 4 sets 32 stimuli	4 trial blocks Errors with intraverbal and listener categorization
Mike	147 trial blocks (M = 29) 5 sets 40 stimuli	5 trial blocks (M = 1) 5 sets 40 stimuli	5 trial blocks Errors with intraverbal categorization
Meredith	106 trial blocks (M = 21) 5 sets 40 stimuli Provided the name of the correct category, instead of the name of the stimulus itself during a maintenance triala	7 trial blocks (M = 1) 5 sets 40 stimuli	4 trial blocks Errors with intraverbal and listener categorization

^aCollateral verbal behavior of interest