The observed responses are quite similar to those predicted by a basic (non-opponent) motion-energy model [Adelson & Bergen (1985) Journal of the Optical Society of America A, 2, 284-299].
In particular, the Reichardt model (as well as opponent combinations of energy models) predicts a separable space-time symmetry in the 2-bar interaction that is not observed in our measurements, while the non-opponent energy model predicts an inseparable, oriented interaction very similar to the measured cortical responses.
Two distinct functional types of cells frequently encountered, one ON and one OFF, had non-opponent spectral sensitivity, relatively high response gain, transient light responses, and large receptive fields (RFs) that tiled the region of retina recorded, suggesting that they belonged to the same morphological cell class, most likely parasol.
According to this theory, the outputs of the three cone-types are transformed into two opponent chromatic signals and one non-opponent achromatic signal.
In a study by Nicolić, Lichti, and Singer [31], incongruent Stroop colours were chosen to be maximally opponent to the colours that were induced by synaesthesia; larger interference effects were found for opponent colours than for non-opponent incongruent colours.
Consistent with this prediction are the recent findings that individual differences in color perception influence performance on the classic Stroop color-word task and that incongruent opponent color pairs (e.g., the word BLUE in yellow ink) decrease the strength of Stroop interference compared to non-opponent color pairs (e.g., BLUE in red ink) [ 76].
Bin Laden has long been regarded by the Americans as their most powerful, non-state opponent.
The Framingham State College Rams, a non-divisional opponent, fell to 0-2 aftheirheir 21-14 loss to the Engineers.
That match, however, is the only non-M.L.S. opponent the Red Bulls are scheduled to face this season.
The first-team game tomorrow is against a non-league opponent at Spurs' training ground in Enfield.
They meet for the first time as non divisional opponents, but the result should be similar to a recent trend: Tampa Bay has won four of the last five meetings.
