Table 2.

Components of Choice in the 3-box Apparatus

Week	Outcomes	Trials		Food Cup Checks		Total Time in Box (s)
		Single - Outcome	Mixed - Outcome	Single - Outcome	Mixed - Outcome	Single - Outcome	Mixed - Outcome
1	0 vs 0/3	6.78 ± 1.08**, ++	112.78 ± 10.49 ##	17.22 ± 3.51**, ++	917.11 ± 130.62##	289.12 ± 32.71**, ++	1075.00 ± 83.62##
2	1 vs 0/3	102.00 ± 16.38	65.78 ± 13.38	319.33 ± 36.87	497.11 ± 129.47	761.47 ± 91.65	697.08 ± 99.26
3	2 vs 0/3	96.89 ± 12.66**, ++	35.67 ± 10.47#	522.78 ± 94.95*, ++	223.00 ± 62.79	898.84 ± 108.83++	522.09 ± 89.22
4	1 vs 0/5	93.00 ± 13.53	56.22 ± 8.24	346.78 ± 67.11	470.89 ± 82.35	647.59 ± 73.60	760.56 ± 82.74
5	1 vs 0/3	106.67 ± 20.46	60.78 ± 14.95	400.56 ± 87.58	466.00 ± 138.34+	697.84 ± 120.19	676.09 ± 119.20+
6	1 vs 0/1	186.89 ± 18.53**, ##	23.78 ± 5.22++	838.89 ± 134.80**, #	101.78 ± 22.34++	1106.75 ± 84.17**, #	306.44 ± 49.13++

Note. Raw data for measures of consumption, approach, and place conditioning are represented. Data presented are for the number of trials each animal performed (Trials), the number of times they checked each food cup (Food Cup Checks), and the total amount of time (in seconds) spent in each box (Total Time in Box). Preference can be assessed by comparing the single-outcome to mixed-outcome in each week. Discrimination is assessed by comparing single-outcome from W1 – W3 and mixed-outcome from W4 – W6. Relative reward is assessed by comparing mixed-outcome from W1 – W2 and W2 – W3, as well as single-outcome from W4 – W5 and W5 – W6. Significant differences are indicated by * for preference, + for discrimination, and # for relative reward.

A single symbol represents p < .05, while double symbols represent p < .01 For example, *, +, or # represent p < .05. **, ++, or ## reflect p < .01. Values are mean ± standard error.