A note on Landahl's theory of psychophysical discrimination

Abstract

In his theory of psychophysical discrimination H. D. Landahl assumes that because of the symmetry of the neural circuit considered the fluctuation of the difference of excitations at the two parallel connections is the same as if the fluctuations occurred only at either one of the connections. It is shown that if the excitation at both connections fluctuates independently according to a simple exponential probability function, the difference of excitation fluctuates according to a different probability function.