Equiluminous red-green sine-wave gratings were drifted at a uniform rate in the bottom half of a 10-deg field. In the top half of the display was a sinusoidal-luminance grating of the same spatial frequency and 95% contrast that drifted in the opposite direction. Observers, while fixating a point in the display center, adjusted the speed of this upper comparison grating so that it appeared to match the velocity of the chromatic grating below. At low spatial frequencies, equiluminous gratings were appreciably slowed and sometimes stopped even though the individual bars of the grating could be easily resolved. The amount of slowing was proportionally greatest for gratings with slow drift rates. Blue-yellow sine-wave gratings showed similar effects. When luminance contrast was held constant, increasing chrominance modulation caused further decreases in apparent velocity, ruling out the possibility that the slowing was simply due to decreased luminance contrast. Perceived velocity appears to be a weighted average of luminance and chrominance velocity information.

The purpose of this study was to evaluate the gender stereotypes endorsed by elementary and high school students regarding mathematics and language. We developed a questionnaire allowing students to rate mathematics and language as either male or female domains and administered it to a sample of 984 elementary and high school French-speaking Canadian students (Grades 6, 8, and 10). Results showed that, with the exception of Grade 6 boys, students did not believe that mathematics was a male domain, or even conceived of mathematics as a predominantly female domain, suggesting that the traditional stereotype favouring boys in mathematics might have changed over the past few years. Moreover, language was clearly viewed as a female domain. Overall, our findings suggest that boys seem to be in need of encouragement in school, especially regarding language, where the advantage given to girls is particularly salient.

When observers who watched repeated alternations of a red contracting spiral and green expanding spiral were later shown stationary spirals, red and a green the red stationary spiral appeared to be expanding and the green stationary spiral appeared to be contracting. These color-contingent motion after effects complement reports of motion-contingent color aftereffects and suggest that both may reflect adaptation of detectors specific to color and motion.

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