According to Freud… for 'normal' gender development, a child needs to be raised by at least one parent of the same gender (in order to resolve, identify, internalise)
This is supported by Rekers and Morey (1990) who looked at the gender identity of boys aged 3-11 - of those who were classified as 'gender non-conformist', 75% had no father or substitute father living with them
this gives Freuds theory increased validity