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that reaction of the needle which occurs at the precise end of any major thought voiced by the auditor. (HCOB 25 May 62)
- if the needle reacts within 1/5 to 1/10 of a second after the question is asked, it is an instant read. This is valid. If it reacts 1/2 to 1 second after the question, this is invalid. (HCOB 28 Sept 61)