Atypical gender development Flashcards
What is gender dysphoria?
A small minority of people experience a mismatch between their biological sex and the gender they identify with.
Do individuals identify with their sex?
No
What does gender dysphoria exclude?
Intersex conditions that have a recognised biological basis e.g. Klinefelter’s syndrome.
What may gender dysphoria be subject to?
Some biological influence.
What does the biological explanation of gender dysphoria suggest?
Gender dysphoria has a basis in brain structure - BST
What is BST involved in?
emotional responses and sexual behaviour in rats.
How does BST compare to males and females?
Larger in males and found to be female sized in transgender females - Krujiver et al.
What is suggested about how people identify and BST?
People with gender dysphoria have a BST the size of the gender they identify with
What does dimorphism of BST suggest?
It fits with the report made by people who are transgender that they feel they were born the wrong sex - Kruijver et al.
What did Cooldige et al assess?
157 twin pairs for evidence of gender gender dysphoria.
What did researchers find out about twins with gender dysphoria?
62% of the variance could be accounted for by genetic factors which suggests strong heritable component of gender dysphoria.
What did Heylens compare?
23 MZ twins with 21 DZ twins where one of each pair was diagnosed with gender dysphoria.
Findings of Heylens twin studies?
39% of MZ twins wree concordant for gender dysphoria compared to none of the DZs which indicates a role for genetic factors in the development of gender dysphoria.
Biological explanations evaluation:
central claims have been challenged
- Hulshoff Pot et al studied changes in transgender individual’s brains using MRI taken during hormone treatment.
- Scans showed the size of BST changed significantly.
- Studies by Krujiver et al and Zhou et al the BST was examined post-mortem and after transgender individuals recieved hormone treatment.
- Suggests differences in BST have been an effect of hormone therapy rather than the cause of gender dysphoria.
Biological explanations evaluation:
Evidence suggests there may be other brain differences associated with gender dysphoria
- Rametti et al studied sexually dimorphic aspect of the brain - white matter.
- There are regional differences in the proportion of white matter in male and female brains.
- Rametti et al analysed the brains of transgender males and females before they began hormone treatment.
- In most cases the amount and distribution of white matter corresponded more to the gender the individuals identified themselves as rather than their biological sex.
- Suggests there are early differences in brains of transgender individuals.