“…Awareness and perception without awareness are inferences based on task performance. The magnitude of a neurophysiological response to a stimulus can vary as a function of selective attention (Naatanen, & Picton, 1987), subjective probability and expectancy (Coles, Gratton, & Fabiani, 1990), and personality (Kline et al, 1998;Kline, Schwartz, Fitzpatrick, & Hendricks, 1993), to name a few. These conclusions have obviously been made in the context of controlled experimentation with fixed variables.…”