Simonov P V
Zh Vyssh Nerv Deiat Im I P Pavlova. 1984 Sep-Oct;34(5):953-7.
Elaboration of conditioned avoidance of artificial (increase of illumination and presentation of a sound) and zoosocial (cry of pain) aversive stimuli reveals rats with stable individual behavioural properties comparable to parameters of H. Eysenck's typology: extra-introversion, neuroticism and psychoticism.