Dimensions of personality disorders and neurophysiological correlates

Abstract

Introduction. To objective is to identify the factorial structure underlying personality disorders, using clinical and personality measures, and to check whether the resulting structure is valid and theoretically comprehensible, using neurocognitive and psychophysiological measures for establishing possible differences between the factors.

Method. From the data obtained with the scales MCMI-II and BFQ administered to a sample of 87 subjects diagnosed as a case of any clinical category of DSM-IV personality disorders, and 17 normal controls, we carried out first-order and second-order factor analyses.

Results. Five first-order factors (designated as aggressive personality, personality with social deficit, non-pathological personality, obsessive personality and non-assertive personality) and three second-order factors (personality with social deficit/non-assertive, aggressive personality, and non-pathological/obsessive personality) were found.

Conclusions. On studying the second-order factors in relation to neurocognitive and psychophysiological measures, it was found that socially-inhibited and non-assertive personalities (factor 1) are characterized by specific neuropsychological deficits in sustained attention; that aggressive personalities (factor 2) are characterized by impulsiveness and deficit in concepts formation; and that in non-pathological personalities with obsessive traits (factor 3), as obsessiveness increases, subjects present less efficacy in sustained attention tasks and greater psychogalvanic response to stress.