Research indicates that most abusive parents report that they themselves were

True. There are always exceptions. However, the sheer magnitude of natural vital cognitive functions are forming all over the brain. In addition the ever so loving evolving external stimuli plays big role consciously or unconsciously contributing to that development too. Taking the many cognitive problems that could be pre-existing and scientifically apply the various environmental/personal outside issues that plague the average abuse victim, examine how those people overcome just a quarter of the silent suffering.
Many times the victims take &/or use very intracite sometimes even drastic measures to not only hide past, but forget it. They sometimes justify, blame themselves, & take casualties to forgive themselves. Unfortunately, the adult residual effects are unpredictible at best & when controlled; its okay unti its not. Sadly the abused begin to feel normal & without continuing the cycle they feel week. The triggers vary and the above instances are just SOME of the various reasons that the Stististics are not only correct but have yet to have anyone find results, to refute them even a little.
SORRY THAT TOOK & IS S LONG. I'd rather have you over prepared... Let me know its too much