The mean session length for the first (Baseline 1) and second (Treatment) phases differed by less than 1 minute. The mean length of the third phase (Baseline 2) was more than 2 minutes less than the treatment phase (Phase 2) and 3 minutes less than the first phase (Baseline 1). Although there was some variability in the number of questions asked during the two baseline phases, only five questions were asked during each of the treatment sessions. This may be partially attributed to the differing lengths of the storybooks read in the phases. Overall, the time taken to implement the questions did not differ much from the first baseline to treatment, even though there were, on average, twice as many questions asked in the baseline phases than there were in the intervention phase.