APFCC+-+Nurnberger+and+Gershon


 * APFCC: Nurnberger and Gershon**


 * Theorist**: Nurnberger and Gershon
 * Study** **of**: Genetic basis of depression
 * Year**: 1982

Reviewed twin studies and found that MZ twins had a significantly higher concordance rate of depression. But more of a genetic vulnerability than a predisposition.
 * Summary:**

To review the results of twin studies to investigate the concordance rate of twins in relation to depression
 * Aim:**

They reviewed 7 studies
 * Procedures:**

They found that MZ (monozygotic) twins had a consistently higher concordance rate than DZ (dizygotic) twins, 65% compared to 14% respectively.
 * Findings:**

Genetic predisposition to PTSD is a contributing factor in PTSD
 * Conclusions:**

The concordance rate for MZ twins, while higher than DZ is significantly less than 100 indicating that this is just ONE of many contributing factors, not the sole one. More likely it is a genetic vulnerability than a disposition.
 * Criticisms:**

Page 151 - Crane and Hannibal
 * Resources:**