Porter’s law

the principle that the critical flicker frequency increases with the logarithm of the brightness of the stimulus, independent of the stimulus wavelength. Also called Ferry–Porter law. [Thomas Cunningham Porter (1860–1933), British scientist; Edwin Sidney Ferry (1868–1956), U.S. physicist]

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Psychology term of the day

November 25th 2024

gender constancy

a child’s emerging sense of the permanence of being a boy or a girl, an understanding that occurs in a series of stages: gender identity, gender stability, and gender consistency.