Table 2. Components definitions for Generalizability study with two-facets (P ×  I ×  O).

Persons (P)	Universe of person scores p (averaged deviation of individual scores from grand mean over items and occasions)
Items (I)	Item effect i (averaged deviation of item scores from grand mean over persons and occasions)
Occasions (O)	Occasion effect o (averaged deviation of occasion scores from grand mean over persons and items)
P × I	Effect of interaction between person p and item i averaged over occasions
P ×  O	Effect of interaction between person p and occasion o averaged over items
P ×  I ×  O, e	Effect of interaction between person p, item i and occasion o, containing random error