Report; Technical Report (1961/07/18); RAND Corporation; No. P-2375; In journal article form, this was published in British Journal of Psychology, 53, 1962 (after much editorial conflict between Herbert A. Simon and the Editor of the BJP). This describes EPAM I. The EPAM I model does not give any details about how individual items are learned, i.e. no discrimination nets, etc.. It only deals with how much attention is paid to each item in what "noticing order".