SPHERICITY By N., Pam M.S. - April 13, 2013 An assumption in data analysis that when a person is measured on more than one occasion the answers will be the same. Read also the REPEATED MEASURES DESIGN for understanding. SPHERICITY: "Sphericity is applied to data analysis." Related Psychology Terms SINGLE-CASE EXPERIMENTAL DESIGN GEISSER-GREENHOUSE CORRECTION OWN CONTROL AUTOCORRELATION BETWEEN-GROUPS DESIGN STOCHASTIC MODEL P FACTOR ANALYSIS BETWEEN-SUBJECTS DESIGN CATEGORY-SYSTEM METHOD EXPLORATORY DATA ANALYSIS Cite this page: N., Pam M.S., "SPHERICITY," in PsychologyDictionary.org, April 13, 2013, https://psychologydictionary.org/sphericity/ (accessed May 17, 2020).