PSYCHOLOGICAL AND COGNITIVE SCIENCES Correction for “Eye movement evidence that readers maintain and act on uncertainty about past linguistic input,” by Roger Levy, Klinton Bicknell, Tim Slattery, and Keith Rayner, which appeared in issue 50, December 15, 2009, of Proc Natl Acad Sci USA (106:21086–21090 first published November 24, 2009; 10.1073/pnas.0907664106).
The authors note that panels A and B of Fig. 2 were transposed, and that statistical significances for panels C and D were transposed in the figure caption. The corrected figure and its legend appear below.
Fig. 2.
Means and standard errors of measures of processing difficulty associated with the critical word (e.g., tossed in sentences 2a and 3a; thrown in sentences 2b and 3b) and overall sentence comprehension. (A) Proportion of trials with first-pass regression from critical word. (B) Go-past time from first fixation on critical word to first fixation beyond it. (C) Proportion of trials with fixation on earlier preposition (at/toward) during go-past reading of critical word. (D) Accuracy in comprehension-question answering. (E) First-pass time on critical word. In A, B, and D, interactions between preposition and critical-word ambiguity are significant (all ANOVA P < 0.05); in C, the interaction is P = 0.087. In E, main effect of critical-word ambiguity is significant (ANOVA P < 0.05 by participants, P < 0.1 by items).