Simple motor reaction time (RT) to 100 percent negative contrast stimuli was measured for various background luminances as well as after bleaching a fraction of retinal photopigments. RT decreased to asymptotical value with the increase of background intensity. The intensity-dependent portion of RT behaved identically for 100 percent positive and negative contrast. Moreover, RT to 100 percent n...

modulation using a twisted nematic liquid crystal television’, Appl. Opt., 1989,28, pp. 4845-4852 BONE, M. F., COAT% D., CROSSLAND, w. A., GU”, P., and ROSS, P. w.: ‘Ferroelectric liquid crystal display capable of video line address times’, Displays, July 1987, pp. 115-118 HATANO, T., YAMAMOTO, K., TAKEZOE, H., and FUKUDA, A . : ‘Alignment controls and switching characteristics in a ferroelectr...