Relationships between trait measures in groups chosen for their extreme scores on the Eysenck personality inventory

Four groups of subjects chosen for their relatively extreme scores on the Extraversion and Neuroticism scales of the Eysenck Personality Inventory were tested using Endler's Situation-Response Inventory of General Trait Anxiousness and Strelau's Temperament Inventory subscales of excitation and inhibition. Although many of the differences across groups were predictable it was found that the dimensions tapped by Eysenck's scales act as modifier variables on the other measures, producing different degrees of inter-correlation in the various subgroups.