Effects of lesions of the nucleus accumbens core on choice between small certain rewards and large uncertain rewards in rats.

As before, a main effect of probability ( F 2.0,32.6 = 38.4, = .510, p < .001) and a lesion × probability interaction ( F 2.0,32.6 = 4.29, = .510, p = .022) were present; in addition, there was a marginally significant lesion × hunger × probability interaction ( F 4,64 = 2.51, p = .05).

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By this stage the difference was highly significant ( F 1,16 = 12.6, p statistical = .003), even if corrected for four comparisons ( p statistical = .012) using the Šidák correction.

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