Figure 3. Log choice ratios (right over left) from individual conditions (see Table 1 for ratios used in each condition) as a function of obtained log reinforcer frequency ratios (upper panels) or log reinforcer magnitude ratios (lower panels).

Each point was obtained by averaging the number of choices and reinforcers from the last 65 trials of a block. The lines represent least-squares fits of the generalized matching law, the coefficients of which are listed in Table 2. The solid symbols plotted at the extremes of the abscissa (for Monkey B) represent blocks where no reinforcers were obtained from one of the alternatives. For the magnitude conditions, the effect due to reinforcer frequency has been subtracted from the log choice ratios.