Table 1.

The blocked design for training in Phase B and testing in Phases C and D. Each daily session began (block 1: trials 1 and 2) with a rewarding sugar trial followed by a QHCl trial to remind hamsters of the task contingencies. Each daily session ended (block 2: trial 16) with a sugar trial to end on a positive association and encourage maintained performance over subsequent days. Order of all other trials was pseudorandomized within each of block. S+=Sugar; Q−=QHCl; C+=Control at sugar location; C−=Control at QHCl location; P+=ambiguous probe closest to the sugar location; Pmid=middle probe; P−=ambiguous probe closest to the QHCl location. Trial numbers are shown in parentheses.

	block
Phase	1		2
B (trial n)	S+, Q− (1, 2)	2C+, 2C−, S+, Q− (3–9)	2C+, 2C−, S+, Q− (10–15)	S+ (16)
C/D (trial n)	S+, Q− (1, 2)	C+, C−, P+, Pmid, P− S+, Q− (3–9)	C+, C−, P+, Pmid, P−, Q− (10–15)	S+ (16)