classic study bio
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what is the biological classic study
raine et al
what was raine et als aim
to investigate the pattern of activity in NGRI murders and non murders using PET scans
how many particpants where their
41 offenders41 non murders
what kind of desighn was it
matched pairs desighn
what was the matched pairs desighn based on
age and sex
out of the NGRI group how many where male and female
39 males, 2 females
where did the study take place
uni of California
what was the first step of the procedure
both NGRI and control injected with a radio active glucose tracer
when in the pet scan what did the participants do
they completed the continous performance task
where was their an increase in activity in
right side thalamusright side amygdala
where was their a decrease of activity in
PFCleft side amygdala
what was first conclusion
murders pleading MGRI have significant differences in the metabolism of glucose in a number of brain areas compared to non-murderes
what did this conclusion show
therefore the results indicated that there may be a link between abnormal brain activity and a predisposition towards violence in a specific group
give one generalisbability weakness
population validity one weakness of raine et als study was population validity.as all the participants where offenders and 41 NGRI the finding on brain activity aren’t representative to a wider populationt/f this decreases the generalisability of the study as findings on brain activity are unrepresentative as not every individual is an offender
give a strength
standerdised procedure both the group of offenders who pleaded NGRI and the control group where given the same glucose tracer and given the same continous performance task