Coding scheme for study type, participant age, and type of oral language measure.

Construct	Type	Code
Study Type	Journal article	1
	Thesis/Dissertation	2
	Unpublished data	3
	Book chapter	4
Age
	Predominantly including participants who were 6 years and below	1
	Predominantly including participants who were 6 to 8/9 years (if including years 7-9)	2
	Predominantly including participants who were 8/9 years and above (if including years 10-12)	3
Oral Language
	Vocabulary	1
	Narrative (e.g., storytelling)	2
	Listening Comprehension	3
	Syntactic/Grammar	4
	Semantic Knowledge (e.g., morphological awareness)	5
	Figurative Language (e.g., idioms, expressions)	6
	Verbal working memory (e.g., verbal recall)	7