long-wavelength pigment

long-wavelength pigment

the photopigment, present in one of the three populations of retinal cones, that has maximum sensitivity to a light wavelength of 558 nm. The absence of the gene for the long-wavelength pigment causes protanopia (red color blindness). See also medium-wavelength pigment; short-wavelength pigment.

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pure-tone audiometry

pure-tone audiometry see audibility range; audiogram.

placebo group

placebo group see placebo control group.

Quick Info

Category Psychology Term
Definitions 1
First Letter L

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