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Submitted on: 28 July 1998.
Revised on: 04 November 1998.
Accepted on: 21 November 1998.
___________________JOURNAL OF NONVERBAL BEHAVIOR---SPRINGER
Submitted on: 03 May 2017.
Revised on: 12 June 2017.
Accepted on: 02 August 2017.
___________________JOURNAL OF NONVERBAL BEHAVIOR---SPRINGER