Table 2.

Six notable clusters in the intellectual structure of scientific literacy pre and post the year 2000 (1980 to 2019).

Mean Year	ID	Size	Silhouette	LSI	LLR	MI
1993	4	53	0.822	Science; science knowledge; cognitive strategy use	Cognition and cognitive apprenticeship; talking their way into science	Cognition and cognitive apprenticeship; marginalized discourses and scientific
1995	3	50	0.810	Science; media; pupils; biomedical communications; reasoning; parents views	Scientific reasoning; misunderstanding science; science and technology	Science and technology; civic scientific literacy
1996	6	33	0.914	Science; nature; instructional practice; competent scientific practice	Social knowledge; cultural basis; information source	Social knowledge; cultural basis; moving toward a portfolio culture
2007	1	96	0.794	Science; nature; evaluating knowledge; curriculum reform; high school	Literacy component; new direction; teaching nature	Equipping student; science model; explicit and reflective versus
2002	2	66	0.885	Science; values; young people; literacy; fundamental sense;	Informal reasoning; society and environment; research on conceptual change	Society and environment; research on conceptual change
2009	7	45	0.871	Science; language; English language learners; argument; online argumentation	Learning progression; scientific argumentation	Argumentation from science studies; epistemic thinking

The order of the clusters is presented according to the cluster size.