Lesson 3.2.2
3.2.2 Brain scanning, twin and adoption studies Quiz: Pearson Edexcel Psychology, Unit 3
20 questions
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Lesson 3.2.2, Brain scanning, twin and adoption studies: 20 multiple choice questions for the Pearson Edexcel Psychology (9PS0), Unit 3: Biological psychology, written with Revision Ninja.
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The 20 questions
-
Which brain-scanning technique uses multiple X-ray beams to produce detailed structural images?
- fMRI scan
- EEG scan
- CAT scan
- PET scan
-
What does a PET scan track to measure metabolic activity in brain areas?
- Magnetic fields
- Radioactive tracer
- Electrical voltage
- X-ray absorption
-
Why is fMRI often preferred over PET scans in psychological research?
- No radiation
- Faster setup
- Lower cost
- Simpler data
-
What percentage of shared genes do monozygotic twins have in common?
- 50%
- 25%
- 0%
- 100%
-
Approximately what percentage of genes do dizygotic twins share with each other?
- 50%
- 10%
- 100%
- 25%
-
What is the main purpose of conducting adoption studies in biological psychology?
- Test drug efficacy
- Isolate environmental factors
- Measure brain volume
- Increase sample size
-
If adopted children match biological parents in a trait more than adoptive parents, which factor is indicated?
- Genetic influence
- Demand characteristics
- Environmental influence
- Social learning
-
Which assumption in twin studies states that MZ and DZ twins experience similar environments?
- Equal environments
- Equal gene pool
- Random mating
- Representative sampling
-
What primary signal does fMRI measure to determine active regions of the brain?
- Blood oxygenation
- X-ray attenuation
- Glucose uptake
- Electrical impedance
-
What is the primary safety hazard associated with PET scanning technology?
- Strong magnets
- Noise damage
- Surgical infection
- Radiation exposure
-
Which scientific advantage is provided by brain-scanning methods compared to self-report questionnaires?
- High convenience
- High objectivity
- Qualitative detail
- Low cost
-
Why can brain scans not prove that a specific brain region causes aggression?
- They show structure
- They show correlation
- They lack objectivity
- They lack reliability
-
A twin study finds higher concordance for aggression in MZ twins than DZ twins. What does this indicate?
- Genetic contribution
- Purely environmental cause
- Zero genetic influence
- Recessive allele dominance
-
What do twin studies like Gottesman and Shields (1966) compare to estimate genetic influence?
- Mean differences
- Correlation coefficients
- Standard deviations
- Concordance rates
-
What key confounding variable in twin studies do adoption studies successfully avoid?
- Demand characteristics
- Individual differences
- Participant attrition
- Shared environment
-
What issue arises when adoption agencies place children into homes similar to biological parents?
- Selective placement
- Observer bias
- Equal environment assumption
- Participant attrition
-
What do fMRI scans measure to show brain activity, unlike PET scans?
- X-ray absorption
- Electrical voltage
- Radioactive tracers
- Blood oxygen levels
-
Which brain-scanning technique measures blood oxygen changes to show functional activity during a task?
- fMRI
- PET scan
- EEG
- CAT scan
-
What percentage of genetic material do monozygotic twins share?
- 100%
- 50%
- 75%
- 25%
-
Adoptees showing similar aggression levels to biological parents they never lived with demonstrates what?
- Environmental influence
- Selective placement
- Social learning
- Genetic influence
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