Assessing the Relationship Between Item Recognition and Source Memory Using Multivariate Signal Detection Theory
Diaz, Michael Lazaro
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https://hdl.handle.net/2142/82160
Description
Title
Assessing the Relationship Between Item Recognition and Source Memory Using Multivariate Signal Detection Theory
Author(s)
Diaz, Michael Lazaro
Issue Date
2008
Doctoral Committee Chair(s)
Benjamin, Aaron S.
Department of Study
Psychology
Discipline
Psychology
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Psychology, Cognitive
Language
eng
Abstract
This paper develops a bivariate strength model that is able to simultaneously account for source memory and recognition memory performance. The model is grounded in the source monitoring framework, which suggests that the strength of a test probe depends upon what aspects of a memory representation are queried. In four experiments, the fit of the model to empirical data is assessed with respect to the current benchmark in the field, Yonelinas's (1994, 1999) dual-process model. In addition, the properties of the model are examined to better inform our understanding of the relationship between recognition and source memory. In all conditions, the bivariate strength model outperformed the dual-process model. The parameters from those fits suggest that the effects of encoding are not global: there are factors that selectively improve recognition performance and source memory performance (Experiments 1 and 2). Experiment 3 further suggested recognition memory may benefit primarily from the initial presentation of an item and, consistent with the one-shot hypothesis, this benefit is not enhanced by increasing study time. Experiment 4 found that the effects of forgetting do appear to be global: performance on recognition and source memory test decreased at proportional rates with time. Overall, it is demonstrated that a continuous strength model is a viable candidate to describe performance on different memory tasks simultaneously, and that it provides a unique means of gathering information about the underlying representations.
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