1 Subjects: “...Grundlagen, Theorie und übergreifende Darstellungen...”

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

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

4 Subjects: “...contingency theory...”

5 Subjects: “...critical theory...”

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

7 Subjects: “...grounded theory...”

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