Popper and P300: Can the view ever be falsified that P3 latency is a specific indicator of stimulus evaluation?

The stimulus-evaluation hypothesis of P3 states that the latency of the P3 ERP component (also termed P300) is specifically sensitive to experimental factors that delay stimulus processing and is relatively unaffected by variables that delay response selection and execution (e.g., Duncan-Johnson and Kopell, 1981). Therefore, according to this hypothesis, P3 latency offers the means for decomposing delays encountered while producing overt stimulus-induced responses into the portion associated with stimulus evaluation and the portion associated with response production.