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  • Title: Item and order information in subject-performed tasks and experimenter-performed tasks.
    Author: Engelkamp J, Dehn DM.
    Journal: J Exp Psychol Learn Mem Cogn; 2000 May; 26(3):671-82. PubMed ID: 10855425.
    Abstract:
    This study investigated the enactment effect from the perspective of the item-order hypothesis (e.g., M. Serra & J. S. Nairne, 1993). The authors assumed that in subject-performed tasks (SPTs), item encoding is improved but order encoding is disrupted compared with experimenter-performed tasks (EPTs), that order encoding of EPTs is only better in pure lists, and that the item--order hypothesis is confined to short lists. Item information was tested in recognition memory tests, order information in order reconstruction tasks, and both item and order information in free-recall tests. The results of 5 experiments using short (8 items) and long lists (24 items) in a design with list type (pure, mixed) and encoding condition (EPT, SPT) as factors supported the hypotheses.
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