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. Author manuscript; available in PMC: 2012 Sep 10.
Published in final edited form as: Q J Exp Psychol (Hove). 2011 Sep 20;64(12):2301–2315. doi: 10.1080/17470218.2011.591936

Table 2.

The canister lid colours and contingencies for Experiment 2

Canister colours/contingency

Monkey A → [ ] A → B
P Blue Yellow
H Yellow Blue
T Yellow Blue

Note: Choice of one canister resulted in a grape followed by a 4-s delay (A → [ ]), and choice of the other resulted in a grape followed 4 s later by half a vegetable (A → B).