This form of the disorder is commonly referred to as "developmental" or "congenital" prosopagnosia, and these individuals simply fail to develop normal face processing abilities despite normal intellectual and perceptual functions. Developmental prosopagnosics have suffered from the face recognition impairment for most of their lives, perhaps since birth. Recent evidence suggests there may be a genetic contribution to developmental prosopagnosia, and several case studies report at least one first-degree relative who also suffers from the face recognition impairment.