Abstract
Much recent visual information processing research has employed linear or rectangular letter displays subtending up to 8 deg of visual angle in width. Subsequent theory based on these data has assumed the simultaneous availability to some central processor of all n targets. Data on retinal acuity suggest that this assumption is gratuitous. Six subjects served in a tachistoscopic speeded letter recognition task wherein display luminance, retinal target locus, number of alternative target positions, and stimulus degradation by superimposition of a dot grid were manipulated orthogonally. Identification reaction times increased on the order of 100 msec as targets were located 3 deg from the fovea center, and results under convergent operations in the design suggested that these reaction time increases were a manifestation of peripheral stimulus degradation factors (such as acuity, masking, and luminance) rather than more central cognitive processes.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
