Experiments in Discrimination
A pigeon can be trained to peck when a light of a certain wavelength is flashed. It will also peck at lights of other wavelengths, but at a rate which declines in proportion to the difference in wavelength
A pigeon can be trained to peck when a light of a certain wavelength is flashed. It will also peck at lights of other wavelengths, but at a rate which declines in proportion to the difference in wavelength