TABLE 3.

Number of studies meeting criteria for generalizability markers [adapted from reference (23) with permission of the publisher (copyright 2018 Wiley Periodicals, Inc)]

Generalizability marker	Criteria	Response	Number of studies meeting criteria
Sampling robustness	What was the institutional setting?	Statewide or multiple institutions	3
		One institution	59
	What was the sample size?	Sample size equal or above 300 participants	18
		Sample size below 300 participants	44
	Was there a comparison group?	Comparison group	49
		No comparison group	13
	Was the study a longitudinal design (i.e., data at multiple times for at least one cohort of students)?	Yes, it was a longitudinal study	59
		No, it was not a longitudinal study	3
	Was the study multiple cohorts?	Yes, it was multiple cohorts	51
		No, it was not multiple cohorts	11
Modeling technique	What method(s) were used to test relationship(s) between learning outcomes and independent variables?	Regression	4
		Correlation	2
		t-Test, ANOVA, or chi-square analysis	47
		Descriptive analysis	9
Limitations stated	Did author describe the limitations of the study’s findings or methods?	Yes	30
		No	32