1 Subjects: “... training, Heterogeneity, Skill development, Oligophrenia, Adult education, Adult training, Interviews...”

2 Subjects: “...adult stem cells...”

3 Subjects: “...blind older adults...”

4 Subjects: “...older adults...”

5 Subjects: “...Hungarian representative adult sample...”

6 Subjects: “...older adults...”

7 Subjects: “...older adults...”

8 Subjects: “...older adults...”

9 Subjects: “...older adults...”