Table 2.

Quality assessment on each included study using Law and MacDermid [24] tool.

Studies	Instrument◊	Evaluation criteria† (score: 2 = good, 1 = moderate, 0 = poor, N/A = not applicable)												Total score (%)
		Item 1	Item 2	Item 3	Item 4	Item 5	Item 6	Item 7	Item 8	Item 9	Item 10	Item 11	Item 12
Dender & Stagnitti [108]	IPPS	2	2	2	1	1	N/A	2	2	2	2	0	2	82
Golchin et al. [109]	ChIPPA	2	2	1	2	2	1	2	1	1	2	2	1	79
Stagnitti et al. [125]	ChIPPA	2	2	2	1	0	N/A	2	2	2	2	0	2	77
Stagnitti & Lewis [129]	ChIPPA	2	2	2	0	0	N/A	2	2	2	2	0	1	68
Uren & Stagnitti [128]	ChIPPA	2	1	2	0	0	N/A	2	2	2	2	0	1	64
Swindells & Stagnitti [127]	ChIPPA	2	0	2	0	0	N/A	2	2	1	2	2	1	64
Stagnitti & Unsworth [124]	ChIPPA	1	1	1	0	0	2	2	2	2	2	1	1	63
Dender & Stagnitti [107]	I-ChIPPA	1	2	2	1	0	N/A	1	1	1	2	0	2	59
Pfeifer et al. [120]	ChIPPA	2	1	1	1	0	N/A	2	2	1	1	0	2	59
McAloney & Stagnitti [117]	ChIPPA	1	1	2	0	0	N/A	2	2	2	1	1	1	59
Sposito et al. [123]	Knox PPS	2	2	1	1	2	N/A	2	1	1	2	0	2	73
Jankovich et al. [112]	Knox PPS	2	2	2	1	0	N/A	2	2	2	1	0	2	73
Lee & Hinojosa [116]	Knox PPS	2	2	2	1	0	N/A	1	1	1	2	0	2	64
Bledsoe & Sheperd [102]	Knox PPS	2	2	2	2	1	0	1	1	2	1	0	1	63
Harrison & Keilhofner [111]	Knox PPS	1	2	1	2	0	1	1	1	2	1	0	1	54
Pacciulio et al. [119]	Knox PPS	2	1	1	1	0	N/A	1	1	1	1	0	1	45
McDonald & Vigen [118]	McDonald Play Inventory	2	2	1	2	1	0	2	1	2	1	0	1	63
Schneider & Rosenblum [120]	My Child's play	1	1	1	2	1	N/A	2	0	1	2	1	2	64
Lautamo et al. [115]	PAGS	2	2	2	0	1	N/A	2	2	2	2	2	2	86
Lautamo & Heikkilä [113]	PAGS	2	1	2	0	1	N/A	2	2	2	2	1	2	77
Lautamo et al. [114]	PAGS	2	1	2	0	1	N/A	2	1	2	2	2	2	77
Behnke & Fetkovich [101]	Play history interview	2	2	2	2	0	0	2	1	2	1	0	2	67
Sturgess & Ziviani [126]	Playform	2	2	1	0	0	N/A	1	2	1	0	0	1	45
Bundy et al. [106]	T-TUM	1	2	2	1	1	N/A	2	2	2	2	1	2	82
Bronson & Bundy [104]	ToP + TOES	2	2	2	2	1	N/A	2	2	1	1	1	2	82
Hamm [110]	ToP + TOES	2	2	2	2	0	N/A	2	2	1	1	1	2	77
Bundy et al. [105]	ToP	2	2	2	2	1	N/A	2	2	1	1	0	2	77
Brentnall et al. [103]	ToP	2	1	2	1	0	2	1	2	2	2	1	2	75
Rigby & Gaik [121]	ToP	2	2	2	0	0	N/A	2	2	1	1	0	1	59
Okimoto et al. [130]	ToP	2	2	1	0	0	N/A	1	1	2	1	0	1	50

^†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.