1 Subjects: “...human health, human-nature connection theory...”

2 Subjects: “...Mathematical theory of computation / bicssc...”

3 Subjects: “...Theory of Inventive Problem Solving...”

4 Subjects: “...dual processing theory...”

5 Subjects: “...contingency theory...”

6 Subjects: “...learning theory...”

7 Subjects: “...social trust theory...”

8 Subjects: “...Social Capital Theory...”

9 Subjects: “...protection motivation theory...”

10 Subjects: “...critical theory...”

11 Subjects: “...stakeholder theory...”

12 Subjects: “...Dempster-Shafer evidence theory (DST)...”

13 Subjects: “...item response theory (IRT)...”

14 Subjects: “...theory of change...”

15 Subjects: “...grounded theory...”

16 Subjects: “...protection motivation theory...”