Approaches Flashcards
Bio Ap. - outline the findings from Christiansen (1977) twin study (Danish)
3,586 twin pairs were studied in Danish Islands
Concordance rates of 35% MZ and 13% DZ = male twins
21% MZ & 8% DZ = females
Bio Ap - outline the findings/ concordance rates from Dalgard and Kringlen (1976) Norweigan twin study
Concordance rates - 26% MZ & 15% DZ
What are the 3 main problems with twin studies?
- Hard to locate and study twins
- Concordance rates should be 100% with MZ twins
- Low concordance rates suggest an environmental influence
BA - outline the findings of Crowe (1972) adoption study
Almost 50% of the children sampled who’s biological mother had a criminal record had a criminal record themselves by 18years.
In a matched control group - children who’s mothers didn’t have a record only 5% had been convicted.
BA- outline the findings from Hutchings and Mednick (1975)
Biological & Adoptive Father had a criminal record = 36.2% of sons also
Biological father = 21.4% sons
Adoptive father = 11.5%
Neither = 10.5%
BA - what do the findings from Hutchings and Mednick suggest?
Genetics play a role but environmental factors cannot be neglected
BA - outline Stott 1982 findings (Pre Natal influences)
Prenatal influences affect the child, high stress on mother (low socio-economic class > high crime rates) can result in a variety of developmental disorders
Criminal tendencies in adoptive children as adults may be a result of problems during pregnancy not the environment
What are the 2 main issues with adoption studies?
- Adopted children are placed in similar environments to their biological parents
- Children are adopted at different ages some very late & early life experiences caused their behaviour
Biological Approach- outline the findings from the twin study conducted by Lange (1929)
Largest twin study, found MZ twins show a higher degree of concordance compared to DZ twins for criminal behaviour
Bio A - outline what Kendler et al (1992) found about anxiety
Anxiety disorders such as panic attacks, OCD & phobias are thought to have a genetic basis
Bio A- Outline Johnson et al 2000 study on smoking & anxiety disorders
A - link between teen smoking & anxiety
M - Longitudinal study 700 teens & number of cigarettes smoked daily
R - Teens who smoked more than 20 cigs. 15x to have panic attacks as an adult 5x more likely to have a general anxiety disorder
C - smoking as a teen can = anxiety
Bio Ap - what does Borjeson note about Obesity and Genetics in 1976?
Obesity is highly heritable with correlation for identical twins being 0.70.
Bio Ap - What did Bailey find out in 1993 about the link between homosexuality and genetics
Concordance rates of 50% for MZ and 20% for DZ
List 3 disorders which have a genetic basis
- Down’s Syndrome ( physical and mental defects)
- Turner’s Syndrome ( Sterile women)
- Huntington’s Chorea ( personality change, memory impairment uncontrollable body movements)
BE Ap - Outline Watson & Raynor’s Little Albert’s study in (1920)
A- Classical conditioning on a young infant can lead to a fear of white rats
M - 11months old was presented with a white rat alongside a loud noise ( steel bar & hammer) & repeated until white rat was shown without sound
R - Lil Al developed a fear of white rats & fluffy white objects
C - fear can be conditioned
What did Skinner develop from his Skinner Box Experiment? (Operant Conditioning)
Law of Acquisition
What is the Law of Acquisition?
The strength of an operant behaviour increases when it is followed by a reinforcing stimulus
SLT- outline Bandura’s bobo doll experiment (1965)
A- Lab experiment to show learning aggressive behaviour takes place from observation which is only performed in appropriate situations
M- Children watched 5min clip of adults behaving aggressively to the doll & divided into groups
Group 1 - adult was praised for their aggressive behaviour
Group 2 - adult was punished for their aggressive behaviour
Group 3 - control group were not shown 2nd film
** Children put in a room with a bobo doll & observed