Individual differences in boundary extension and false memory K Inomata1, Y Nomura2 |
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1Graduate School of Kansai University, Japan |
| Boundary extension is a phenomenon wherein participants remember seeing more of a scene than was actually shown (Intraub & Richardson, 1989, Journal of Experimental Psychology: Learning, Memory, and Cognition, 15(2), 179–187). Previous studies have found that participant characteristics (e.g., age, personality, and psychiatric disorder) influenced boundary extension. However, individual cognitive differences in boundary extension have not been investigated. Although boundary extension is a perceptual issue, it is indirectly evaluated by measuring memory. Thus, in this study, the relationship between the magnitude of boundary extension and false alarm rate in the DRM paradigm (Roediger & McDermott 1995, Journal of Experimental Psychology: Learning, Memory and Cognition, 21(4), 803-814) was investigated. Participants rated the magnitude of boundary extension in close-up pictures and wide-angle pictures and performed a word recognition task according to the DRM paradigm. We found a positive significant correlation between the magnitude of boundary extension in close-up pictures and false recognition rate of lure targets. This result suggests that boundary extension could be interpreted as false memory and affected by the memory ability of the participants. |
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