Table 2.

Mean Fidelity of Implementation^* by Time and Intervention Strategy for Average and Best Fidelity

Intervention
Time	Discrete Trial Teaching M (SD)	Pivotal Response Training M (SD)	Functional Routines M (SD)	Overall Fidelity M (SD)
Average Fidelity Across all Assessments During Time Period (%)
Time 1	78.54 (24.33)	53.41 (24.09)	56.43 (16.42)	65.14 (16.47)
Time 2	73.94 (21.16)	58.43 (26.66)	69.77 (19.05)	68.45 (15.39)
Time 3	71.04 (27.79)	68.39 (20.25)	75.56 (24.17)	71.66 (20.01)
Time 4	80.46 (17.55)	60.19 (21.39)	78.51 (19.80)	73.58 (12.98)
Best Fidelity for Each Time Period (%)
Time 1	81.64 (24.93)	54.64 (25.60)	63.53 (20.38)	69.86 (18.00)
Time 2	84.53 (19.77)	65.22 (23.38)	79.96 (21.33)	77.72 (16.28)
Time 3	79.21 (26.94)	73.78 (21.21)	81.59 (23.78)	81.33 (11.19)
Time 4	90.74 (13.00)	74.16 (21.96)	91.45 (16.50)	85.70 (11.19)

^*Fidelity of implementation is defined as the percentage of strategy components implemented correctly.