Louis Alfieri | University of Pittsburgh (original) (raw)

Papers by Louis Alfieri

Aviation, space, and …, Jan 1, 2004

Many stationary participants who view the patterned interior of a rotating cylinder (optokinetic ... more Many stationary participants who view the patterned interior of a rotating cylinder (optokinetic drum) experience motion sickness (MS) symptoms. Most drum interiors have consisted of black and white patterns. An experiment was conducted to investigate the effects of chromaticity on MS onset and severity. There were 12 individuals who participated in the experiment (4 men, 8 women, mean age = 25). Keeping rotation speed constant (5 RPM), the color of vertical stripes in an optokinetic drum was manipulated. There were three conditions used: 1) alternating black and white stripes; 2) gray stripes having different luminance values; and 3) chromatic stripes (white, red, yellow, black, green, and blue) that approximately matched the luminance values of the stripes in the gray condition. Every 2 min, eight motion sickness symptoms were assessed (for up to 16 min) using a subjective scale (0 = none, 1 = slight, 2 = moderate, 3 = severe). Overall, MS onset was fastest, and symptoms the most severe, in the chromatic condition. The two major MS symptoms that were significantly affected were headache and dizziness. Chromaticity may affect how much an observer's visual environment appears to be stationary, perhaps because chromaticity is such a common feature of the stationary environment in which our visual system evolved. In an optokinetic drum, the addition of chromaticity may increase the disparity between visual and vestibular inputs, a factor thought by many to contribute to MS onset and severity.

British Journal of …, Jan 1, 2008

Ninety-three children ranging in age from 5 to 8 years (M=82.46 months, SD=13.20) participated in... more Ninety-three children ranging in age from 5 to 8 years (M=82.46 months, SD=13.20) participated in a training study designed to improve their emotion understanding. Children either explained (self-explanation condition) or listened to an experimenter who explained (experimenter-...

Journal of Educational Psychology, Nov 15, 2010

Educational Psychologist, Apr 20, 2013

Aviation, space, and …, Jan 1, 2004

Many stationary participants who view the patterned interior of a rotating cylinder (optokinetic ... more Many stationary participants who view the patterned interior of a rotating cylinder (optokinetic drum) experience motion sickness (MS) symptoms. Most drum interiors have consisted of black and white patterns. An experiment was conducted to investigate the effects of chromaticity on MS onset and severity. There were 12 individuals who participated in the experiment (4 men, 8 women, mean age = 25). Keeping rotation speed constant (5 RPM), the color of vertical stripes in an optokinetic drum was manipulated. There were three conditions used: 1) alternating black and white stripes; 2) gray stripes having different luminance values; and 3) chromatic stripes (white, red, yellow, black, green, and blue) that approximately matched the luminance values of the stripes in the gray condition. Every 2 min, eight motion sickness symptoms were assessed (for up to 16 min) using a subjective scale (0 = none, 1 = slight, 2 = moderate, 3 = severe). Overall, MS onset was fastest, and symptoms the most severe, in the chromatic condition. The two major MS symptoms that were significantly affected were headache and dizziness. Chromaticity may affect how much an observer's visual environment appears to be stationary, perhaps because chromaticity is such a common feature of the stationary environment in which our visual system evolved. In an optokinetic drum, the addition of chromaticity may increase the disparity between visual and vestibular inputs, a factor thought by many to contribute to MS onset and severity.

British Journal of …, Jan 1, 2008

Ninety-three children ranging in age from 5 to 8 years (M=82.46 months, SD=13.20) participated in... more Ninety-three children ranging in age from 5 to 8 years (M=82.46 months, SD=13.20) participated in a training study designed to improve their emotion understanding. Children either explained (self-explanation condition) or listened to an experimenter who explained (experimenter-...

Journal of Educational Psychology, Nov 15, 2010

Educational Psychologist, Apr 20, 2013