Findings from xPhi suggest that moral intuitions may have a major influence on our intuitions about personal identity. For example, some experimental philosophers have found that when a person undergoes a dramatic change (e.g., traumatic brain injury), people are less likely to think that the person is the "same" after their dramatic change if the person became morally worse (as opposed to morally better).[61] Data like this support the "moral self hypothesis", that "moral traits are essential" to personal identity,[62] with some going as far as saying that, "When someone undergoes dramatic mental change, their numerical identity—whether they're the same person as they were before—can seem to become disrupted".