TY - JOUR
AU1 - Tiffin, Joseph
AU2 - Rabideau, Gerald F.
AB - To determine the effect of a reduction in trials per stimulus upon reliability of visual-acuity thresholds computed by the method of constant stimuli, visual-acuity thresholds were determined for 15 Ss, using a Landolt ring. Thresholds were computed using 5 stimulus values and 5, 10, 20, 30, 40, and 50 presentations per stimulus. Retest reliabilities of .92 and higher were obtained for as few as 10 trials per stimulus. It is concluded that "1 . . . . classical . . . investigators probably tended to utilize more judgments than are necessary . . . 2 . . . . for purposes of estimating absolute thresholds, the Müller-Urban constant method with five stimulus sizes appears to yield satisfactorily reliable thresholds . . . when as few as 10 trials per stimulus and 4-choice response categories are used."
TI - Reduced trials and reliability of visual-acuity thresholds obtained by the method of constant stimuli
JF - Journal of Applied Psychology
DO - 10.1037/h0048331
DA - 1955-04-01
UR - https://www.deepdyve.com/lp/american-psychological-association/reduced-trials-and-reliability-of-visual-acuity-thresholds-obtained-by-xHILdHXAl2
SP - 78
EP - 81
VL - 39
IS - 2
DP - DeepDyve
ER -