TY  - JOUR
A1  - Inhoff, Albrecht W.
A1  - Seymour, Bradley A.
A1  - Schad, Daniel
A1  - Greenberg, Seth
T1  - The size and direction of saccadic curvatures during reading
N2  - e movements during the reading of multi-line pages of texts were analyzed to determine the trajectory of reading saccades. The results of two experiments showed that the trajectory of the majority of forward-directed saccades was negatively biased, i.e., the trajectory fell below the start and end location of the saccadic movement. This is attributed to a global top-to-bottom orienting of attention. The curvature size and the proportion of negative trajectories were diminished when linguistic processing demands were high and when the beginning lines of a page were read. Longer pre-saccadic fixations also yielded smaller saccadic curvatures, and they resulted in fewer negatively curved forward-directed saccades in Experiment 1 although not in Experiment 2. These findings indicate that the top-to- bottom pull of saccadic trajectories is modulated by processing demands and processing opportunities. The results are in general agreement with a time-locked attraction-inhibition hypothesis, according to which the horizontal movement component of a saccade is initially subject to an automatic top-to-bottom orienting of attention that is subsequently inhibited.
Y1  - 2010
UR  - http://www.sciencedirect.com/science/journal/00426989
U6  - https://doi.org/10.1016/j.visres.2010.03.025
SN  - 0042-6989
ER  - 
TY  - JOUR
A1  - Inhoff, Albrecht W.
A1  - Seymour, Bradley A.
A1  - Schad, Daniel
A1  - Greenberg, Seth
T1  - The size and direction of saccadic curvatures during reading
N2  - Eye movements during the reading of multi-line pages of texts were analyzed to determine the trajectory of reading saccades. The results of two experiments showed that the trajectory of the majority of forward-directed saccades was negatively biased, i.e., the trajectory fell below the start and end location of the saccadic movement. This is attributed to a global top-to-bottom orienting of attention. The curvature size and the proportion of negative trajectories were diminished when linguistic processing demands were high and when the beginning lines of a page were read. Longer pre-saccadic fixations also yielded smaller saccadic curvatures, and they resulted in fewer negatively curved forward-directed saccades in Experiment 1 although not in Experiment 2. These findings indicate that the top-to- bottom pull of saccadic trajectories is modulated by processing demands and processing opportunities. The results are in general agreement with a time-locked attraction-inhibition hypothesis, according to which the horizontal movement component of a saccade is initially subject to an automatic top-to-bottom orienting of attention that is subsequently inhibited.
Y1  - 2010
UR  - http://dx.doi.org/10.1016/j.visres.2010.03.025
SN  - 0042-6989
ER  -