eye movements were recorded. Word frequency influenced fixation durations and the probability of word skipping when orthographic familiarity was controlled. These results indicate that lexical processing of words can influence saccade programming (as shown by fixation durations and which words are fixated). Orthographic familiarity, but not word frequency, influenced the duration of prior fixations. These results provide evidence for orthographic, but not lexical, parafoveal-on-foveal effects. Overall, the findings have a crucial implication for models of eye movement control in reading: there must be sufficient time for lexical factors to influence saccade programming before saccade metrics and timing are finalised. The conclusions are critical for the fundamental architecture of models of eye movement control in reading, namely, how to reconcile long saccade programming times and complex linguistic influences on saccades during reading.Key words / phrases: Reading. Eye movements. Word frequency. Orthography. Models of eye movement control in reading.Word frequency and orthographic familiarity 1 As we read, the linguistic characteristics of words influence the duration of fixations and which words are fixated (Rayner, 1998). The present study provides a detailed examination of the influences of orthographic familiarity and word frequency on eye movements during reading. It thus provides a critical assessment of the relationship between linguistic text processing and the systems that control when and where the eyes move. Specifically, whether lexical processing can have an immediate influence on saccade programming is examined. The issues addressed here have crucial implications for the architecture of models of eye movement control in reading. The article adds to a growing number of recent studies which specifically aim to test and develop such accounts (Inhoff, Eiter, & Radach, 2005; Kliegl, Nuthmann, & Engbert, 2006; Rayner, Ashby, Pollatsek, & Reichle, 2004; Rayner, Juhasz, & Brown, 2007; Rayner, Liversedge, White, & Vergilino-Perez, 2003;Reingold & Rayner, 2006). Previous studies of the effects of word frequency and orthography will first be discussed. Models of eye movements in reading will be summarised which may account for such effects. Finally, the issue of whether processing of parafoveal information can influence prior fixations (parafoveal-onfoveal effects) and where words are fixated (saccade specification) will be considered.
Word frequency effectsThe influence of word frequency on word processing is an established finding both for isolated word response time tasks (Monsell, 1991) and sentence reading (Rayner, 1998). Inhoff and Rayner (1986) (also Rayner & Duffy, 1986) first demonstrated, that for words in sentences with word length controlled, first fixation durations and gaze durations (the sum of fixations before leaving a word) are longer on infrequent than frequent words.Word frequency effects during sentence reading are usually spatially localised to the word Word frequency and orthog...