Table 1.

Number of threshold measurements per subject. Notes: Color direction and temporal frequency conditions were distributed nearly continuously in the experiment but are binned coarsely in the table. Nonopponent and opponent stimuli are those in which L- and M-cone modulations had the same or opposite sign, respectively.

Subject	Total No. of threshold measurements	Opponent ≤5 Hz	Nonopponent ≤5 Hz	Opponent >5 Hz	Nonopponent >5 Hz
M1	344	56	86	69	133
M2	724	117	193	151	263
H1	220	35	60	39	86
H2	272	41	77	46	108