Differences between sensitivity measures obtained with stabilized and unstabilized targets can be large or small, according to the length of viewing time and fixation instructions given to the observer.
© 1982 Optical Society of America
Ulker Tulunay-Keesey, "Contrast thresholds with stabilized and unstabilized targets," J. Opt. Soc. Am. 72, 1284-1286 (1982)