Speech production involves at least two types of process. On the one hand, words have to be selected. On the other, they have to be integrated into the syntax. There are two main kinds of slip. First is selection errors, cases in which a speaker has picked out the wrong item, as in "Please hand me the tin-opener (nut-crackers). Second is assemblage errors, cases in which a correct choice has been made, but the utterance has been wrongly assembled "Dinner is being served at wine (Wine is being served at dinner)."