Refixation probability during reading is lowest near the word center, suggestive of an optimal viewing position (OVP). Counterintuitively, fixation durations are largest at the OVP, a result called the Inverted Optimal Viewing Position (IOVP) effect (Vitu, McConkie, Kerr, and O'Regan, 2001). Current models of eye-movement control in reading fail to reproduce the IOVP effect. We propose a simple mechanism for generating this effect based on error-correction of mislocated fixations due to saccadic errors (Nuthmann, Engbert, and Kliegl, in press). First, we propose an algorithm for estimating proportions of mislocated fixations from experimental data yielding a higher probability for mislocated fixations near word boundaries. Second, we assume that mislocated fixations trigger an immediate start of a new saccade program causing a decrease of associated durations. Thus, the IOVP effect could emerge as a result of a coupling between cognitive and oculomotor processes.
|Conference||13th European Conference on Eye Movements|
|Period||14/08/05 → 18/08/05|