biological explanations to schizophrenia Flashcards

1
Q

What does biological explanations not deny the importance of

A

psychological factors that play in the onset of this disorder

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2
Q

What is the diathesis stress relationship at work with

A

biological predisposition for schizophrenia

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3
Q

what causes you to develop biological predisposition for schizophrenia

A

significant psychological stressors are present

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4
Q

What are the different types of biological explanations of schizophrenia

A

Diathesis stress model
genetic factors
combination of genes

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5
Q

Can schizophrenia be hereditary or not

A

Yes it can

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6
Q

Who’s more likely to develop schizophrenia an individual who’s family has the disorder or the one who doesn’t

A

The individual who’s family has schizophrenia

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7
Q

Is there a specific gene that causes schizophrenia

A

No it’s more likely to be multiple which causes vulnerability to schizophrenia

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8
Q

If you have the schizophrenic gene does that mean you’ll get schizophrenia

A

not necessarily

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9
Q

What did Gottesman and Shields 1991 find

A

individuals who have schizophrenic relatives are effected more often then non-biological relatives

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10
Q

What increases the risk of genetic schizophrenia

A

Being related genetically

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11
Q

What was Gottesman and shields concordance rates when studying children with 2 schizophrenic parents

A

46%

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12
Q

What was Gottesman and shields concordance rates when studying children with 1 schizophrenic parent

A

13% and siblings

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13
Q

What was Gottesman and shields concordance rates when studying children with a sibling with schizophrenia

A

9%

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14
Q

Which twins are genetically Mz or DZ

A

MZ

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15
Q

What does concordance rate mean

A

the. probability of one twin having the disorder if the other already has it expressed as a percentage

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16
Q

What did Joseph calculate in 2004

A

pooled data for schizophrenia twin studies shows a concordance rate of 40.4 Mz twins and 7.4 for Dz twins

17
Q

Do blind studies tend to have a higher or lower concordance rate for MZ twins

18
Q

Do the blind studies have a higher rate of schizophrenia for Mz twins and DZ twins

A

Mz twins still have a higher rate

19
Q

What type of individuals are used in adoption studies

A

genetically related individuals who’ve been reared apart

20
Q

Who carried out the most methodology study

A

Tienari et al 2000 in Finland

21
Q

how many adoptees were used in Tienari’s study

A

164 with schizophrenic mothers

22
Q

how many of the 164 adoptees had schizophrenia

23
Q

How many control adoptees did Tienari use

24
Q

How many control adoptiees had schizophrenia

25
What were Tienari's finidngs
genetic liability to schizophrenia had been decisively confirmed
26
What are the strengths of biological explanations
genetic factors make some people much more vulnerable than others
27
What are the weaknesses of biological factors
- adoptees may be selectively placed with families - MZ twins treated more similarly than DZ twins - explained by family backgrounds and experiences rather than genetics