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Flexible conceptual combination: Electrophysiological correlates and consequences for associative memory.

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Title: Flexible conceptual combination: Electrophysiological correlates and consequences for associative memory.
Authors: Lucas, Heather D., Hubbard, Ryan J., Federmeier, Kara D.
Source: Psychophysiology. Jun2017, Vol. 54 Issue 6, p833-847. 15p.
Subjects: Associative memory (Psychology), Memory, Associative learning, Flashbacks (Memory), Evoked potentials (Electrophysiology), Mental imagery
Abstract: When meaningful stimuli such as words are encountered in groups or pairs (e.g., 'elephant-ferry'), they can be processed either separately or as an integrated concept ('an elephant ferry'). Prior research suggests that memory for integrated associations is supported by different mechanisms than is memory for nonintegrated associations. However, little is known about the neurocognitive mechanisms that support the integration of novel stimulus pairs. We recorded ERPs while participants memorized sequentially presented, unrelated noun pairs using a strategy that either did or did not involve attempting to construct coherent definitions. We varied the concreteness of the first noun in each pair to examine whether conceptual combination instructions would induce compositional concreteness effects, or differences in ERPs evoked by the second noun as a function of the concreteness of the first noun. We found that the conceptual combination task, but not the noncombinatory encoding task, produced compositional concreteness effects on a late frontal negativity previously linked to visual imagery. Moreover, word pairs studied under conceptual combination instructions showed evidence of more unitized or holistic memory representations on associative recognition and free recall tests. Finally, item analyses indicated that (a) items with higher normed imageability ratings were rated by participants as easier to conceptually combine, and (b) in the conceptual combination task, ease-of-combination ratings mediated an indirect relationship between imageability and subsequent associative memory. These data are suggestive of a role of compositional imagery in the online formation of novel concepts via conceptual combination. [ABSTRACT FROM AUTHOR]
Copyright of Psychophysiology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Flexible conceptual combination: Electrophysiological correlates and consequences for associative memory.
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  Data: <searchLink fieldCode="AR" term="%22Lucas%2C+Heather+D%2E%22">Lucas, Heather D.</searchLink><br /><searchLink fieldCode="AR" term="%22Hubbard%2C+Ryan+J%2E%22">Hubbard, Ryan J.</searchLink><br /><searchLink fieldCode="AR" term="%22Federmeier%2C+Kara+D%2E%22">Federmeier, Kara D.</searchLink>
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  Data: <searchLink fieldCode="DE" term="%22Associative+memory+%28Psychology%29%22">Associative memory (Psychology)</searchLink><br /><searchLink fieldCode="DE" term="%22Memory%22">Memory</searchLink><br /><searchLink fieldCode="DE" term="%22Associative+learning%22">Associative learning</searchLink><br /><searchLink fieldCode="DE" term="%22Flashbacks+%28Memory%29%22">Flashbacks (Memory)</searchLink><br /><searchLink fieldCode="DE" term="%22Evoked+potentials+%28Electrophysiology%29%22">Evoked potentials (Electrophysiology)</searchLink><br /><searchLink fieldCode="DE" term="%22Mental+imagery%22">Mental imagery</searchLink>
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  Data: When meaningful stimuli such as words are encountered in groups or pairs (e.g., 'elephant-ferry'), they can be processed either separately or as an integrated concept ('an elephant ferry'). Prior research suggests that memory for integrated associations is supported by different mechanisms than is memory for nonintegrated associations. However, little is known about the neurocognitive mechanisms that support the integration of novel stimulus pairs. We recorded ERPs while participants memorized sequentially presented, unrelated noun pairs using a strategy that either did or did not involve attempting to construct coherent definitions. We varied the concreteness of the first noun in each pair to examine whether conceptual combination instructions would induce compositional concreteness effects, or differences in ERPs evoked by the second noun as a function of the concreteness of the first noun. We found that the conceptual combination task, but not the noncombinatory encoding task, produced compositional concreteness effects on a late frontal negativity previously linked to visual imagery. Moreover, word pairs studied under conceptual combination instructions showed evidence of more unitized or holistic memory representations on associative recognition and free recall tests. Finally, item analyses indicated that (a) items with higher normed imageability ratings were rated by participants as easier to conceptually combine, and (b) in the conceptual combination task, ease-of-combination ratings mediated an indirect relationship between imageability and subsequent associative memory. These data are suggestive of a role of compositional imagery in the online formation of novel concepts via conceptual combination. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Psychophysiology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1111/psyp.12840
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              Text: Jun2017
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