ABSTRACT
This chapter explores I-markers and cognitive structures differ and what motivates the distinction between them. The production model must therefore include a component making this selection: the I-marker selector. The I-marker selector formulates an I-marker for a given cognitive structure. A level of cognitive structures must be postulated out of which I-markers are formed. The need for a level of cognitive structures in a production model becomes apparent from considering various phenomena, such as speech errors, changes of mind, and paraphrases. I-markers are coagulated from these cognitive structures by the I-marker selector. If a given cognitive structure can be coagulated into two different I-markers, then the relations in the cognitive structure can not be like either one of these I-marker relations. Groping for the right way to express an idea may be a search for an appropriate lexicalization or relation rule, but it may also stem from an indecision as to which I-marker best expresses the cognitive structure.
