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Proportion correct at 0 dB T∕M ratio as a function of listener age for the contralateral male masker condition in the current experiment and for the ipsilateral male masker condition from two earlier experiments (Wightman and Kistler, 2005; Wightman et al., 2006). Previously unpublished data from additional listeners in the ipsilateral condition are also included. The solid and dashed lines represent logistic functions fit to the data in the two conditions.
