Experimental paradigm and effect of memory in Experiment 2.

<p>(<b>a</b>) Experimental paradigm for Experiment 2. Five stages were included: Rating 1, Choice 1, Rating 2, Choice 2 and Memory test. Each ‘Choice’ block comprised two sub-blocks: one in which the choice was immediately followed by a 2-back task and one including only the choice.(<b>b</b>) Effect of memory on spreading of alternatives. The interaction between the sequence (RCR/RRC) and the memorization of the choices was significant (* p = 0.019). The difference between the spread in the RCR and the RRC sequences was significant only in pairs for which the choice was remembered (** p<0.01, paired t test, two tailed).