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Flexible conceptual combination: Electrophysiological correlates and consequences for associative memory
Heather D Lucas1, Ryan J Hubbard1,2, Kara D Federmeier1,2
1Beckman Institute for Advanced Science and Technology, University of Illinois, Urbana, Illinois, USA.
Psychophysiology
|February 14, 2017
Summary
Creating new concepts involves visual imagery. Researchers found that when people try to combine word pairs into a single concept, visual imagery (compositional imagery) aids memory for these new associations.
Area of Science:
- Cognitive Neuroscience
- Psycholinguistics
- Memory Research
Background:
- Word pairs can be processed as separate items or integrated concepts.
- Prior research indicates distinct memory mechanisms for integrated vs. non-integrated associations.
- Neurocognitive mechanisms of novel pair integration remain unclear.
Purpose of the Study:
- Investigate neurocognitive mechanisms supporting the integration of novel word pairs.
- Examine the role of conceptual combination strategy and noun concreteness in memory formation.
- Determine if conceptual combination induces compositional concreteness effects.
Main Methods:
- Recorded event-related potentials (ERPs) during memorization of unrelated noun pairs.
- Employed strategies involving conceptual combination (creating definitions) vs. non-combinatory encoding.
- Varied the concreteness of the first noun in pairs to assess effects on ERPs of the second noun.
Main Results:
- Conceptual combination task, unlike non-combinatory encoding, yielded compositional concreteness effects on late frontal negativity (linked to visual imagery).
- Word pairs studied with conceptual combination showed more unitized/holistic memory representations in recognition and recall tests.
- Higher imageability ratings correlated with easier conceptual combination, mediating the link between imageability and associative memory.
Conclusions:
- Compositional imagery plays a role in the online formation of novel concepts through conceptual combination.
- The strategy of attempting to create a coherent concept influences memory representation and neurocognitive processing.
- Visual imagery mechanisms may underlie the integration of unrelated words into new conceptual units.
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