Average hemispheric LIs in tumor (top) and vascular lesion (bottom) patients at different threshold values. Top: tumor patients' average LIs for antonym-word generation task (AWG) (n = 57), letter-word generation task (LWG) (n = 42), and text-reading task (TXTREAD) (n = 25) are shown for four t-values (t < 2.0, t < 2.6, t < 3.5, t < 4.0). Bottom: vascular lesion patients' average LIs for antonym-word generation task (AWG) (n = 23), letter-word generation task (LWG) (n = 10), and text-listening task (TXTLISTEN) (n = 13) are shown for four t-values (t < 2.0, t < 2.6, t < 3.5, t < 4.0).