The change in four parent-child interaction variables was evaluated after three months of therapy, with either the Demands and Capacities Model- based treatment or the Lidcombe Program. Results indicate that parents do not change their articulation rate, mean length of utterance, type token ratio and percentage of positive statements after three months of therapy. Furthermore, none of the parental variables proved significantly as a predictor of the child’s fluency. The only significant predictor of the child’s fluency was the factor time (pre- or post therapy)
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