naa a22 4500 510777023 CHVBK 20180411083234.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.3758/s13428-013-0321-6 doi (NATIONALLICENCE)springer-10.3758/s13428-013-0321-6 A behavioral task for the validation of a gaze-contingent simulated scotoma [Elektronische Daten] [Franziska Geringswald, Florian Baumgartner, Stefan Pollmann] Gaze-contingent displays provide a valuable method in visual research for controlling visual input and investigating its visual and cognitive processing. Although the body of research using gaze-contingent retinal stabilization techniques has grown considerably during the last decade, only few studies have been concerned with the reliability of the specific real-time simulations applied. Using a Landolt ring discrimination task, we present a behavioral validation of gaze-contingent central scotoma simulation in healthy observers. Importantly, behavioral testing is necessary to show whether the simulation impairs foveal processing of visual information. This test becomes even more crucial when researchers are faced with null results in a task performed with the scotoma, as compared with a control condition. It must be ruled out that the lack of behavioral effects results from a type II error caused by improper implementation before conclusions about foveal contributions to the given task may be drawn. In our experiment, the scotoma effectively prevented foveal processing of the visual stimuli, leading to significantly reduced response accuracies, as compared with unimpaired vision. Moreover, the final fixation at the time of the participants' responses was placed close to the target position in the unimpaired condition, whereas the distance to the target was enhanced with the scotoma, indicating that the observers were not able to discriminate visual target stimuli from distractors, due to the scotoma. The present work presents a validated behavioral testing method for the efficiency of gaze-contingent scotoma simulations, including code for implementation. In addition, solutions for common methodological problems are discussed. Psychonomic Society, Inc., 2013 Gaze-contingent display nationallicence Artificial scotoma nationallicence Scotoma validation nationallicence Scotoma simulation nationallicence Geringswald Franziska Department of Experimental Psychology, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany aut Baumgartner Florian Department of Experimental Psychology, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany aut Pollmann Stefan Department of Experimental Psychology, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany aut Behavior Research Methods Springer US; http://www.springer-ny.com 45/4(2013-12-01), 1313-1321 45:4<1313 2013 45 13428 https://doi.org/10.3758/s13428-013-0321-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.3758/s13428-013-0321-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Geringswald Franziska Department of Experimental Psychology, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany aut NATIONALLICENCE 700 1- Baumgartner Florian Department of Experimental Psychology, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany aut NATIONALLICENCE 700 1- Pollmann Stefan Department of Experimental Psychology, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany aut NATIONALLICENCE 773 0- Behavior Research Methods Springer US; http://www.springer-ny.com 45/4(2013-12-01), 1313-1321 45:4<1313 2013 45 13428 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer