Missing letter effect

Abstract: Following a general description of the characteristics of letter-by-letter reading and a summary of previous explanations of this reading deficit in both neurological and psychological models, four single-case studies of patients with this syndrome are presented. One central topic, addressed by experimental investigation, concerns comprehension of written words. Despite the use of multiple techniques, no evidence was obtained for the hypothesis that comprehension of a word could occur prior to or in the absence of the letter-by-letter analysis required for oral reading. It appears that these patients must do sequential letter identification of a word in order both to understand it and to report it. A second central topic, addressed through analysis of reading errors, concerns procedures for word recognition. Two of the four patients showed a “pure” letter-by-letter syndrome, with no difficulty in word recognition once the component letters had been identified. For the other two patients, an additional lex...

Abstract: In Experiment 1, it is shown that during reading the eye makes larger saccades near long words than near short words. The effects are reduced when the subject’s peripheral vision is diminished by the use of a moving “window” centered on the subject’s fixation point, outside of which letters are replaced by Xs. In Experiment 2, it is shown that even if linguistic predictions are kept constant, the eye tends to make longer jumps when approaching THE than when approaching a three-letter verb. This “THE-skipping” effect is weaker if THE is compared with an auxiliary (HAD, WAS, or ARE) than if it is compared with a less frequently occurring verb (ATE, RAN, MET). It follows that knowledge of the lexicon can combine with information from peripheral vision fast enough to influence saccade size from moment to moment.

Abstract: Eye movements were monitored during the reading of spatially transformed text in order to examine covert attentional processes in reading. In some conditions, the sequence of letters within a word was congruent with (i.e. in the same direction as) the sequence of words in the sentence; in other conditions the direction of letters within words and the direction of words in the sentence were incongruent. In addition, the window of visible text was varied so that in some conditions only the fixated word (and all preceding words) were visible, whereas in other conditions the fixated word and the succeeding word were both visible. Readers were able to extract more parafoveal information from text when the words themselves were normal than when the letters within the words were transformed. However, with practice, readers were able to use some parafoveal information even when the words were transformed. The most important finding was that the congruity of the word and letter order had no reliable effect on the ...