The purpose of this series of experiments was to evaluate the effects of mixed mand-tact arrangements on the acquisition of mands and tacts in preschool-aged children. In Experiment 1, the effects of three training arrangements (mand-only training, tact-only training, and mand-tact training) were investigated with 3 typically developing children.…

The effects of vocal intraverbal training and listener training on the emergence of untrained categorization skills were evaluated. Five typically developing preschool children initially learned to name a number of previously unfamiliar visual stimuli. Each child then received one of two types of training. Intraverbal training involved reinforcing…

Early and intensive behavioral intervention (EIBI) has been firmly established and disseminated as one of the most effective treatments for early childhood autism. Recently, a number of practitioners have employed a variant of this approach in which the language curriculum is organized and taught according to Skinner's (1957) analysis of verbal…