In a classical SLIP task spoonerisms are elicited with either a lexical or a nonlexical outcome. We argue that if the frequency of a particular class of responses is affected by the lexicality of the expected spoonerisms, this indicates that many such responses have replaced elicited spoonerisms in inner speech. Such effects are shown in early interrupted speech errors, speech errors that are form-related to the spoonerisms, and form-unrelated speech errors. Keywords: Speech errors, lexical bias, feedback, self-monitoring, inner speech.