IRRATIONALITY By N., Pam M.S. - May 11, 2013 A noun meaning the state, condition or quality of lacking rational thought. Example, illogical thinking or decision making. IRRATIONALITY: "Irrationality is used in relation to cognitive behaviour that is illogical." Related Psychology Terms SUBSTANTIVE RATIONALITY RATIONAL SOUL SUBJECTIVE-EXPECTED VALUE PARALOGIA WITZELSUCHT TOTAL QUALITY MANAGEMENT (TQM) GROUP DECISION SUPPORT SYSTEMS (GDSS) JAPANESE MANAGEMENT LIFE INSTINCT CONSENSUS Cite this page: N., Pam M.S., "IRRATIONALITY," in PsychologyDictionary.org, May 11, 2013, https://psychologydictionary.org/irrationality/ (accessed October 15, 2019).