marginally significantp = 0.042
The slope of the psychometric function (Model 1b, see Methods), did show a main effect of test moment (F 1,80 = 30.09, p < 0.0001), and stimulus type (F 2,80 = 44.79, p < 0.0001), and a marginally significant interaction effect (F 2,80 = 3.31, p = 0.042).