Table 2.

Metrics of adaptation in offer value and chosen value responses across six types of range transition

Transition type	ARmax	ARrange	AR-none	ΔRmax	ΔRmin
Increase max	1.04	1.04	0.78*	0.17*,+	0.011
Decrease max	1.13*	1.13*	0.74*	0.22*,+	0.060
Increase min	0.83*	1.23*	0.83*	0.029	−0.20*,+
Decrease min	0.88*	1.39*	0.88*	0.018	−0.19*,+
Increase both	1.37*	1.04	0.86*	0.22*,+	0.17*,+
Decrease both	1.27*	0.94	0.82*	0.17*,+	0.19*,+

Columns 1–3: median ARs calculated for three hypotheses: (1) neurons adapt to maximum value only, (2) neurons adapt to both maximum and minimum values, and (3) neurons do not adapt. If a hypothesis is true, AR = 1. Columns 4–5: median normalized difference in R_max and R_min between blocks. Nonzero values indicate a change in neural activity range between sessions (incomplete adaptation). Asterisks (*) indicate a significant deviation from 1 (columns 1–3) or from 0 (columns 4–5). Plus (+) indicates that the median ΔR_min or ΔR_max differs from the value predicted for non-adaptive coding (ΔR_min,NA and ΔR_max,NA, respectively). ΔR_max,NA = 0.4 for transitions where V_max changes, otherwise ΔR_max,NA = 0; similarly, ΔR_min,NA = 0.4 for transitions where V_min changes, otherwise ΔR_min,NA = 0. All p < 0.01, Wilcoxon signed rank test.