45. CSR: C ase S tudy R esearch a single case a group of cases/ multiple cases CSR DESIGN a single case: a student, a school a group of cases/ multiple cases: st1+st2+st3 or sc1+sc2+sc3
46.
47. Types of CSR: Robert K. Yin ( Case Study Research: Design and methods, 1993 ) 1.EXPLORATORY: before research 2.EXPLANATORY: only the case study, no research after it. 3.DESCRIPTIVE: before research, there is a descriptive theory
48. Types of CSR: Robert E. Stake ( The Art of Case Study Research: 1995) 1. INTRINSIC 2.INSTRUMENTAL 3.COLLECTIVE (DESIGN)
105. 3- Students' choice to study English at the university The experimental group The control group number percentage number percentage Yes 17 70.83 ℅ 16 66.66 ℅ No 7 29.16 ℅ 8 33.33 ℅ Total 24 100 ℅ 24 100 ℅