Expressions such as "either" can be used in a correlative structure
("either...or") or as a quantifier ("either student"). Previous research
found that sentence-initial correlative "either" facilitated coordination
processing by generating a prediction for clausal coordination. This
prediction appeared even for quantificational uses. In the present study, a
self-paced experiment found that correlative "both" triggered a structural
prediction sensitive to its syntactic position. In an eye-tracking
experiment, however, there was no evidence of structural prediction when
"both" was unambiguously quantificational. We conclude that while
correlatives generate predictions about upcoming structure, predictions
across correlatives are not equally strong.