Habituation Of The Orienting Response (OR) In Extroverts And Introverts As A Function Of Stimulus Intensity

Forty-seven subjects were designated as Introverts or Extroverts, according to their score on the EPI (Form A) personality questionnaire. They were presented with thirty trials of either a 60 or 100 db tone of 2-sec duration. Habituation of the orienting response was ascertained by the trials to criterion measure (three successive non-responses).