A 2-year, 8-month old boy with a language handicap was the subject of a 5-month training program which investigated the generalization of articulatory ability during and after a series of sessions aimed at correcting the boy's misarticulation of the letter "t." Before training began, three matters necessitated attention: (1) the establishment of instructional control, (2) the assessment of the boy's language behavior, and (3) the administration of a 26-word probe test. The training condition consisted of five phases interspersed with six probe tests. The training procedures were to correct the subject's misarticulation of the letter t. The probe tests were to measure the improvement and generalization of the subject's ability to articulate. Training phase five and probe tests five and six involved a change in procedure from auditory stimuli to visual stimuli. The results indicated that proper articulation of training and nontraining words ending in t increased, with some fluctuation, during the program and led to the conclusion that generalization of articulatory ability was demonstrated. (WD)