Bio Expl For Sz GENETIC

Question 1

AO1 genetic theory
INTRO step 1

Answer 1

-hereditary nd passed on from one generations to next trough genes
-person born with genetic predisposition to sz
-several maladaptive “candidate” genes e.g PCM1 are involved (polygenic) which inc individuals vulnerability to develop sz
-study show 108 separate genetic variations are associated in risk of developing sz

Question 2

AO1 gottesman (1991) study
INTRO step 2

Answer 2

-studied 40 twins
-found that concordance rate for monozygotic twins=48%
-nd only 17% for dizygotic twins
-therefore closer the genetic link to someone with sz the more chance of developing sz

Question 3

AO3 research to support

Answer 3

P-Tierney
E-studied 155 adopted children who had bio mother with sz found concordance rate of 10% compared to 1% in adopted withount sz parents
E-support role of genetics as the role of social learning theory could have not been a factor as children were adopted.
L-inc validity of genetics as a biological explanation of sz

Question 4

AO3 limitation

Answer 4

P- alternative exp for development of sz is family dysfunction
E-argue sz is due to faulty communication patterns within fam e.g schizophrenogenic mum, she’s cold nd creates fam climate characterised by tension nd secrecy.
E-leads to distrust that later develops into paranoid delusions, rather than delusions being due to levels of genes
L-therefore bio explanation of sz not only explaination that needs to be considered

Question 5

Another AO3 strength

Answer 5

P-it uses scientific methods.

E-theory is based on objective and empirical tech such as gene mapping studies and brain scans, like FMRI, used to identify specific genes (PCM1)

E-Using scientific methods like gene mapping and brain scans ensures that the findings are based on measurable and observable data, enhancing the credibility of the expl.

L-therefore,inc the overall internal validity of the biological explanation of schizophrenia, thus raising Psychology’s scientific status.