IN VIVO By N., Sam M.S. - 113 1. The conditions and biological processes occurring in an organism. Compare in vitro. 2. the condition or process approximating a real life setting created for research. IN VIVO: "Joe modelled his in vivo research on a real life scenario." Related Psychology Terms ADOLESCENCE (Theories) Developing a Case Study SULLIVAN, HARRY STACK (1892- 1949) FREUD, SIGMUND (1856-1939) CLINICAL PSYCHOLOGY Hitler and Conformity OBSESSRVE-COMPULSIVE REACTION Diagnosis and Treatment Planning ANTISOCIAL REACTION CLIENT-CENTERED THERAPY Cite this page: N., Sam M.S., "IN VIVO," in PsychologyDictionary.org, May 11, 2013, https://psychologydictionary.org/in-vivo/ (accessed August 10, 2022).