Exam (elaborations)
Edexcel A Level Biological Psychology May 2024 Exam Review Questions and Answers 100% Pass
- Course
- Institution
Edexcel A Level Biological Psychology May 2024 Exam Review Questions and Answers 100% Pass
[Show more]
Content preview
Edexcel A Level Biological PsychologyMay 2024 Exam Review Questions and
Answers 100% Pass
Monozygotic twins - Answer>> Identical, share 100% of their
genes as they come from one fertilised egg.
What should be considered about MZ twins? - Answer>> - Do
not share the same environment
- There are some physical differences, such as fingerprints
- Can become less identical over time
- Some characteristics, such as IQ and personality might become
more alike as twins age
Epigenetic modification - Answer>> Different environmental
influences affect which genes are switched on and off. Younger
MZ twins have few epigenetic differences.
Dizygotic twins - Answer>> Not identical, come from two
separate eggs fertilised at the same time. Share 50% of genes.
Why are twin studies useful? - Answer>> If a characteristic
comes from genes, MZ twins should be more likely to share it.
Psychologists can compare behaviour between a group of
identical twins and fraternal twins to see which group shared the
most similarity.
Concorance rate - Answer>> The extent to which the same
behaviour is the same between twins. An agreement rate when
both twins have got a characteristic.
Strengths of using twin studies - Answer>> - Twin studies are
the main way of finding out if genes have any influence on
behaviour.
,- Both twins share their environment, so there should not be many
environmental differences between the twins.
Weaknesses of using twin studies - Answer>> - MZ twins will be
treated more like twins than DZ twins, so environments are not
the same.
- Epigenetic modification, there are differences between twins.
Difficult to say if a characteristic is caused by genes conclusively
Gottesman and Shields (1966) procedure - Answer>> - 16 year
period (longitudinal) using 5 twin studies
- To see if there was a relationship between genetic make up and
development of schizophrenia by looking at concordance rate
- 57 twin pairs (24 MZ and 33 DZ)
- Hospital notes and semi-structured interviews
Gottesman and Shields (1966) results - Answer>> - MZ twins -
42%
- DZ twin - 17%
Gottesman and Shields (1966) conclusion - Answer>> Genes
do play a role in the development of schizophrenia, but can't
conclusively say it is solely due to genes.
Why are adoption studies useful? - Answer>> It is the only
direct way to isolate the influence of genes and the environment.
In what circumstances in adoption studies suggest the roles of
genes? - Answer>> Similarities between child and their
biological parents
In what circumstances in adoption studies suggest the roles of
environment? - Answer>> Similarities between child and their
adoptive parents
, Kety et al (1994) - Answer>> - Research in Finland
- Sample of 155
- 9 adopted children, 8 had biological mothers with schizophrenia
or a form of psychoses
Strengths of adoption studies - Answer>> - Developmental
trends (patterns) can be studied because studies are longitudinal.
Same children can be studied at different times during
development.
- Control for environment, separates genes from environment.
Weakness of adoption studies - Answer>> - Adopted children
are often placed into families very similar to their biological
families
- They are matched, so the environments might not be as different
as thought
What are the 3 main brain scanning techniques? - Answer>>
PET scans, CAT scans and fMRI scans
How do PET scans work? - Answer>> - inject patient with FDG
(radioactive)
- task is given to stimulate the brain
- glucose is used up, radioactive atoms break down, gamma rays
produced
- high activity (red)
- low activity (blue)
What are PET scans useful for? - Answer>> Investigating areas
of the brain that are not functioning normally, indicate damage or
tumours.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller RevisionKing. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
73243 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now