†Item 1: relevant background on psychometric properties and research question; item 2: inclusion/exclusion criteria; item 3: specific psychometric hypothesis; item 4: appropriate scope of psychometric properties; item 5: appropriate sample size; item 6: appropriate retention/follow-up; item 7: specific descriptions of the measures (administration, scoring, interpretation procedures); item 8: standardization of methods; item 9: data presented for each hypothesis or purpose; item 10: appropriate statistical tests; item 11: appropriate secondary analyses; and item 12: conclusions/clinical recommendations supported by analyses and results. ◊ChIPPA: Child-Initiated Pretend Play Assessment; I-ChIPPA: Indigenous ChIPPA; IPPS: Indigenous Play Partner Scale; Knox PPS: Revised Knox Preschool Play Scale; PAGS: Play Assessment for Group Setting; ToP: Test of Playfulness; TOES: Test of Environmental Supportiveness; T-TUM: ToP-TOES Unifying Measure.