Electroencephalographic and perceptual asymmetry differences between responders and nonresponders to an SSRI antidepressant21Data from two treatment protocols were combined so as to yield sufficient samples of female and male fluoxetine responders and nonresponders. With the exception of the initial placebo period in one study, the treatment protocols were comparable in terms of both fluoxetine doses and the raters evaluating treatment response. Most importantly, the differences between fluoxetine responders and nonresponders reported for the total samples were also evident when only the data for the placebo-controlled protocol were analyzed; however, the larger total sample allowed us to also take patient gender into account.22The 18 healthy women were screened for psychopathology using a structured interview schedule and were excluded if they had a hearing loss, substance abuse, a history of head trauma, or other neurologic disorder. They did not differ significantly from the female patients in education (mean = 15.8, SD = 1.3) or handedness (LQ = 84.7, SD = 20.6), but they were somewhat younger than the female patients [mean age = 27.6, SD = 6.9;t(35) = 3.21,p = .001]. Age was not, however, related to perceptual asymmetry scores of either female patients (r = −.01, ns) or male patients (r = −.02, ns) on the fused words test. Nor was age significantly correlated with alpha asymmetry scores of female patients (r = −.09, ns) or male patients (r = .11, ns).