Fig. 3.

Percentage of correct responses obtained by each child in the selection and tact probes in each part of Condition B. Left to each bar is the number of correct and total responses required to meet criterion in the tact-selection teaching procedure, or the number of nonrequired responses emitted by the child in the 18 presentations of the pairing procedure: “A” indicates that the child anticipated the word spoken by the experimenter; “E” indicates that the child repeated the word; “S” indicates that the child pointed to the picture on the screen. Two asterisks above a bar indicate that the child met criterion with three stimuli; one asterisk indicates that the child responded correctly to all trials corresponding to two of the three stimuli of the set. (a) indicates that the child said the name in ten trials and then she made a correct selection