Kaij's Study

Question 1

Aim ofKaij’s study

Answer 1

Aim:

-if hereditary factors influence development of addiction

Question 2

Study type of kaij’s study

Answer 2

• questionnaires, Interviews of twins and family members
• info gathered from birth records
• 174 pairs participants, 48 were monozygotic (identical) and 126 were dizygotic (non)
• all Male participants and born in Sweden after 1880

Question 3

Method

Answer 3

1)using info gathered, Kaij used 5 categories ranging from not drinking at all to chronic alcoholic

Question 4

Results

Answer 4

-concordance rate (presence of the same trait in both twins) -54% of monozygotic were in the same category of alcohol compared to28% of dizygotic

Question 5

Evaluating

Answer 5

Strengths- supported that hereditary factors being involved of alcohol addiction
Weakness- only uses males from Sweden
-demand characteristics
-only focused on alcohol abuse
-higher concordance rates with monozygotic twins because of nurture, twins may be treated in a similar nature