is an adjective used to describe a set of test results which differ greatly from the expectations planned before the (psychology) experiment was conducted. This phenomenon is specifically associated with para-psychological experiments.

EXTRACHANCE: "Experimental results do not always follow their predicted values, extrachance occurs when the divergence between predicted and actual is large."
Cite this page: Nugent, Pam M.S., "EXTRACHANCE," in PsychologyDictionary.org, May 11, 2013, https://psychologydictionary.org/extrachance/ (accessed November 17, 2018).