CCEA A-Level Health and Social Care 0003
Promoting Quality Care
Communication in Health, Social Care and Early Years Settings
Health and Well-Being
Safeguarding Children
Adult Service Users
Holistic Therapies
Understanding the Physiology of Health and Illness
Applied Research
Body Systems and Physiological Disorders
Providing Services
Public Health and Health Promotion
Supporting the Family
Understanding Human Behaviour
Human Nutrition and Health
Understanding Human Behaviour
The biological perspective on behaviour
- 3 things to know
- A2 6
Overview
Central claim of the biological perspective, concordance rate and proposed role of testosterone in aggression.
What you need to know
Answer each one before you reveal it.
What is a concordance rate?
Why do researchers compare identical and non-identical twins?
Questions from this subtopic
Each one with the model answer underneath.
- 1
State the central claim of the biological perspective.
Model answer
The biological perspective claims that behaviour has physical causes in genes, brain structure, neurotransmitters and hormones.
- 2
What is a concordance rate?
Model answer
A concordance rate is the percentage of twin pairs in which both twins show a particular characteristic, and researchers use it to estimate genetic influence.
- 3
Why do researchers compare identical and non-identical twins?
Model answer
Identical twins share all their genes while non-identical twins share about half, so a higher concordance rate in identical pairs is taken as evidence of a genetic contribution.
- 4
What do adoption studies add to twin research?
Model answer
Adoption studies compare adopted children with their biological and adoptive parents, separating inherited influence from the influence of the home a child grows up in.
- 5
What does twin evidence suggest about depression?
Model answer
Twin evidence suggests that vulnerability to depression is partly inherited, because concordance is consistently higher in identical than in non-identical pairs, though it is well short of complete.
- 6
Which neurotransmitters are most often linked to depression?
Model answer
Serotonin and noradrenaline are the neurotransmitters most often linked to depression, and the monoamine explanation proposes that low activity of these chemicals underlies low mood.
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