Evaluating the dose-response relationship of the number of sessions of "It Takes Two to Talk®" in young children with language delay.

Purpose: To evaluate the dose-response relationship between the number of It Takes Two to Talk (ITTT) sessions attended and the language outcomes of young children with language delay and their parent's responsivity in a multicultural clinical population.

Method: A clinical caseload of 273 early language delayed children (mean age 29.2 months, SD 7.