naa a22 4500 510777163 CHVBK 20180411083234.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.3758/s13428-012-0311-0 doi (NATIONALLICENCE)springer-10.3758/s13428-012-0311-0 An LCD tachistoscope with submillisecond precision [Elektronische Daten] [Holger Sperdin, Marc Repnow, Michael Herzog, Theodor Landis] Tachistoscopes allow brief visual stimulation delivery, which is crucial for experiments in which subliminal presentation is required. Up to now, tachistoscopes have had shortcomings with respect to timing accuracy, reliability, and flexibility of use. Here, we present a new and inexpensive two-channel tachistoscope that allows for exposure durations in the submillisecond range with an extremely high timing accuracy. The tachistoscope consists of two standard liquid-crystal display (LCD) monitors of the light-emitting diode (LED) backlight type, a semipermeable mirror, a mounting rack, and an experimental personal computer (PC). The monitors have been modified to provide external access to the LED backlights, which are controlled by the PC via the standard parallel port. Photodiode measurements confirmed reliable operation of the tachistoscope and revealed switching times of 3 μs. Our method may also be of great advantage in single-monitor setups, in which it allows for manipulating the stimulus timing with submillisecond precision in many experimental situations. Where this is not applicable, the monitor can be operated in standard mode by disabling the external backlight control instantaneously. Psychonomic Society, Inc., 2013 Visual perception nationallicence Tachistoscope nationallicence Subliminal stimulation nationallicence LCD nationallicence LED backlight nationallicence Visual stimulation device nationallicence Sperdin Holger Department of Fundamental Neuroscience, University Medical School of Geneva (CMU), 1 Rue Michel-Servet, 1211, Geneva, Switzerland aut Repnow Marc Laboratory of Psychophysics, Brain Mind Institute, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland aut Herzog Michael Laboratory of Psychophysics, Brain Mind Institute, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland aut Landis Theodor Department of Fundamental Neuroscience, University Medical School of Geneva (CMU), 1 Rue Michel-Servet, 1211, Geneva, Switzerland aut Behavior Research Methods Springer US; http://www.springer-ny.com 45/4(2013-12-01), 1347-1357 45:4<1347 2013 45 13428 https://doi.org/10.3758/s13428-012-0311-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.3758/s13428-012-0311-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sperdin Holger Department of Fundamental Neuroscience, University Medical School of Geneva (CMU), 1 Rue Michel-Servet, 1211, Geneva, Switzerland aut NATIONALLICENCE 700 1- Repnow Marc Laboratory of Psychophysics, Brain Mind Institute, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland aut NATIONALLICENCE 700 1- Herzog Michael Laboratory of Psychophysics, Brain Mind Institute, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland aut NATIONALLICENCE 700 1- Landis Theodor Department of Fundamental Neuroscience, University Medical School of Geneva (CMU), 1 Rue Michel-Servet, 1211, Geneva, Switzerland aut NATIONALLICENCE 773 0- Behavior Research Methods Springer US; http://www.springer-ny.com 45/4(2013-12-01), 1347-1357 45:4<1347 2013 45 13428 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer