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Submitted on: 18 November 2005.
Revised on: 13 February 2006.
Accepted on: 10 March 2006.
___________________JOURNAL OF EXPERIMENTAL PSYCHOLOGY-ANIMAL LEARNING AND COGNITION
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Submitted on: 25 February 2018.
Revised on: 22 June 2018.
Accepted on: 31 July 2018.
___________________JOURNAL OF EXPERIMENTAL PSYCHOLOGY-ANIMAL LEARNING AND COGNITION
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Submitted on: 26 April 2007.
Revised on: 18 June 2007.
Accepted on: 13 July 2007.
___________________JOURNAL OF EXPERIMENTAL PSYCHOLOGY-ANIMAL LEARNING AND COGNITION