Twin, Family And Adoption Studies Evaluation

Question 1

strengths

Answer 1

• uses scientific methods - so replicable
• generalizable to other adopted twins
• high internal validity

Question 2

weaknesses

Answer 2

• unethical - stress and discomfort
• not specific
• 52 of each group (adoption studies) - small sample size
• 1 woman in the control group had a criminal record
• only looking at the biological mother.

Question 3

additional evaluation 1

Answer 3

Brunner et al. (1993) - research has been criticized for using a case study method. difficult to apply his theory to other families as their genetic makeup is unique.

Question 4

additional evaluation 2

Answer 4

nature vs nurture debate