syntactic relationship that can or must hold between a given pro-form and its antecedent (or postcedent). In this respect, anaphors (reflexive and reciprocal pronouns) behave very differently from, for instance, personal pronouns. Complement anaphora In some cases, anaphora may refer not to its usual antecedent, but to its complement set. In the following example a, the anaphoric pronoun they refers to the children who are eating the ice-cream. Contrastingly, example b has they seeming to refer to the children who are not eating ice-cream: a. Only a few of the children ate their ice-cream. They ate the strawberry flavor first. – They meaning the children who ate ice-cream b. Only a few of the children ate their ice-cream. They threw it around the room instead. – They meaning either the children who did not eat ice-cream or perhaps the children who did not eat ice-cream and some of those who ate ice-cream but did not finish it or who threw around the ice-cream of those who did not eat it, or even all the children, those who ate ice-cream throwing around part of their ice-cream, the ice-cream of others, the same ice-cream which they may have eaten before or after throwing it, or perhaps only some of the children so that they does not mean to be all-inclusive In its narrower definition, an anaphoric pronoun must refer to some noun (phrase) that has already been introduced into the discourse. In complement anaphora cases, however, the anaphor refers to something that is not yet present in the discourse, since the pronoun's referent has not been formerly introduced, including the case of 'everything but' what has been introduced. The set of ice-cream-eating-children in example b is introduced into the discourse, but then the pronoun they refers to the set of non-ice-cream-eating-children, a set which has not been explicitly mentioned. Both semantic and pragmatics considerations attend this phenomenon, which following discourse representation theory since the early 1980s, such as work by Kamp (1981) and Heim (File Change Semantics, 1982), and generalized quantifier theory, such as work by Barwise and Cooper (1981), was studied in a series of psycholinguistic experiments in the early 1990s by Moxey and Sanford (1993) and Sanford et al. (1994). In complement anaphora as in the case of the pronoun in example b, this anaphora refers to some sort of complement set (i.e. only to the set of non-ice-cream-eating-children) or