The use of information below fixation in reading and in visual search.

Two experiments examined whether or not readers obtain useful information from below the currently fixated line. In Experiment 1, subjects read passages of text and the availability of visual information below the line fixated was manipulated using a variant of the moving window technique. Reading was no slower when there was no letter information below the fixated line than when there was full information below the fixated line. However, a condition which made the strings of letters below the fixated line less "wordlike" caused reading to be slowed down by about 6% relative to the other conditions. In Experiment 2, subjects searched for a target word through passages of text. Subjects occasionally detected targets below the line they were fixating; however, there was no clear evidence that the availability of information below the line made search more efficient. It thus appears that in reading (or in other tasks where words are being identified and the eyes move horizontally along a line of text), little visual information is extracted below the line of text fixated.

[1]  K. Rayner,et al.  Asymmetry of the effective visual field in reading , 1980, Perception & psychophysics.

[2]  G. McConkie,et al.  Eye movements and integrating information across fixations. , 1978, Journal of experimental psychology. Human perception and performance.

[3]  K Rayner,et al.  Reading without a fovea. , 1979, Science.

[4]  Alexander Pollatsek,et al.  Asymmetries in the perceptual span for Israeli readers , 1981, Brain and Language.

[5]  K Rayner,et al.  Saccade size in reading depends upon character spaces and not visual angle , 1981, Perception & psychophysics.

[6]  J. H. Bertera,et al.  Masking of foveal and parafoveal vision during eye fixations in reading. , 1981, Journal of experimental psychology. Human perception and performance.

[7]  G. McConkie,et al.  The span of the effective stimulus during a fixation in reading , 1975 .

[8]  K. Rayner,et al.  The psychology of reading , 1989 .

[9]  J. H. Bertera,et al.  The availability of useful information to the right of fixation in reading , 1982, Perception & psychophysics.

[10]  H. Bouma.  Visual recognition of isolated lower-case letters. , 1971, Vision research.

[11]  G. McConkie,et al.  Asymmetry of the perceptual span in reading , 1976 .

[12]  W. Prinz.  Attention and sensitivity in visual search , 1984, Psychological research.

[13]  F. Sun,et al.  Comparative patterns of reading eye movement in Chinese and English , 1985, Perception & psychophysics.

[14]  Albrecht W. Inhoff,et al.  Semantic processing of unattended text during selective reading: How the eyes see it , 1991 .

[15]  Koichi Oda,et al.  Effective visual field size necessary for vertical reading during Japanese text processing , 1991 .

[16]  R. Wurtz,et al.  Brain mechanisms of visual attention. , 1982, Scientific American.

[17]  A Pollatsek,et al.  Covert Attention and Eye Movements during Reading , 1989, The Quarterly journal of experimental psychology. A, Human experimental psychology.

[18]  Albrecht W. Inhoff,et al.  Lack of semantic activation from unattended text during passage reading , 1992 .