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. Author manuscript; available in PMC: 2014 Jan 1.
Published in final edited form as: Cognition. 2012 Oct 9;126(1):109–114. doi: 10.1016/j.cognition.2012.08.004

Fig. 2.

Fig. 2

Proportion of children who waited the full 15 min without eating the marshmallow by condition. Error bars show 95% confidence intervals. In the unreliable condition, only 1 out of the 14 children (7.1%) waited the full 15 min; in the reliable condition, however, 9 out of the 14 children (64.3%) waited. We tested the difference using a two-sample test for equality of proportions with continuity correction at α2-tail = 0.05. The test found it to be highly significant (X2 = 7.6222, df = 1, p < 0.006).