Fig. 9.
[color, EPS]. Left panel: The proportions of infants in the DP1-Pass (dashed line) and DP1-Refer (solid line) group are plotted as a function of each possible value of θL, in which the right-most category NR represents no response, i.e., the AR was absent at every activator level. Right panel: the ROC curve is plotted for θL predicting sound-conduction status as DP1-Pass or DP1-Refer. In each panel, green symbols representing a test result of pass are defined by activator levels with a test sensitivity > 0.90; red symbols representing a test result of refer are defined by activator levels with a test specificity > 0.90; yellow symbols representing a test result of borderline are defined by any activator levels not in either of the other groups.