Average word accuracy (MACS score) across all treated words (solid black line) and untreated words (dashed blue line) is shown for each child (a = P1, b = P2, c = P3, d = P4, e = P5, f = P6, and g = P7). Word accuracy is displayed on the y-axis. Treatment phase is displayed on the x-axis and displays baseline, treatment (gray shading), posttreatment, and maintenance (dotted vertical line). MACS = Multilevel word Accuracy Composite Scale.