Two experiments indicated that sentence verification times were significantly longer when a discrepancy between target sentence and context was in the syntactic presupposition, rather than in the assertion. Findings are best explained by a structural hypothesis, not by strategies designed to locate given and new information. (Author/CP)

An experiment was conducted to determine whether the deep structure or the surface structure clause is more important as a speech planning unit, and whether syntactic decisions are made during sentence production. Results were discussed in relation to previous studies of pausing and speech disruption. (Author/CTM)