Best linear mixed-effects model on d-prime scores of the participants from the morning and evening groups in the pretest and three posttests of AX discrimination.
The models are organized according to two factors: the presence of variability in measurement precision (EP and VP), and the observer’s assumption about the correlation coefficients, ρ.
The experimental material was sinusoidal Gabor patch with a Michelson contrast ratio of 0.03 and a vertical tilt of 45° to the left or right. Blank stimulus is no target stimulus. The experimental mat
