50/50

Noun

 * 1) * 2011 March 8, Kathleen A. Hansen & al., "Persistency of Priors-Induced Biased in Decision Behavior and the fMRI Signal", Frontiers in Neuroscience, No. 5, Art. 29, p. 27:
 * In some cases, the 50/50 condition, in which each alternative has a 50% chance of being the correct choice, is also tested.
 * In some cases, the 50/50 condition, in which each alternative has a 50% chance of being the correct choice, is also tested.