G543 - Turning To Crime: Biology - Raine Et Al Flashcards Preview

Psychology > G543 - Turning To Crime: Biology - Raine Et Al > Flashcards

Flashcards in G543 - Turning To Crime: Biology - Raine Et Al Deck (22)
0

What was the aim?

To determine whether there is a biological basis for criminality

1

What type of scanning method was used?

PET scanning (positron emission tomography)

2

How many criminals were studied?

39 males 2 females

3

What were the criminals charged with?

Murder or manslaughter in california

4

What did they all plead?

Not guilty by reason of insanity (NGRI)

5

What were the 7 reasons for referral?

>Schizophrenia
>head injury or organic damage
>psychoactive drug abuse
>affective disorder
>epilepsy
>hyperactivity or learning disorder
>personality disorder

6

How many participants were in the control group?

41

7

What were the control group matched on?

Sex and age. 6 schizophrenics were also matched with the schizophrenics in the experimental group

8

What do you need to inject into the participant for PET scanning?

A tracer - flurodeoxyglucose or FDG.

9

What is the tracer taken up by?

The active areas of the brain. The more glucose taken up the more active the brain area is

10

What were participants given while having a PET scan?

A continuous performance task (CPT)

11

What lobes does the CPT specifically aim to activate?

The frontal lobes and the right temporal and parietal lobes.

12

Where did murderers have significantly reduced activity?

Both sides of the prefrontal cortex, the posterior parietal cortex and the corpus callosum

13

Where were there abnormal asymmetries?

Amygdala, thalamus and hippocampus

14

Which hemisphere had lower activity compared to the control group

The left hemisphere had lower activity than the right hemisphere in contrast with the control group

15

What has the Amygdala been linked to in other studies?

Violent behaviour

16

What is the prefrontal cortex involved in?

Regulating behaviour

17

What does damage to the prefrontal cortex make it more likely for a person to do?

To act out aggressive impulses

18

Subjects who have had their corpus callosum disconnected have an an inability to do what?

See the consequences of their actions

19

What could corpus callosum disconnection be mirrored by in the NGRI criminals?

Low levels of activity in the corpus callosum

20

How could a person be helped to avoid any possible violent behaviour in the future?

We could scan people to see if they have any of the discovered differences in brain activity levels

21

Why were the criminals regarded as ill rather than criminal?

The crimes committed were a result of their behaviour being influenced by their biology

Decks in Psychology Class (46):