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Hierarchical memory representation of verbal and nonverbal features for emotion

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Abstract

Emotions are thought to be stored in long-term memory based on features as a memory unit of objects. Previous studies suggest that verbal features hierarchically represent emotions, such as sadness. Although emotion is associated with verbal and nonverbal features, it is not clear how these features interrelate in the memory representation of emotion. We hypothesized that some nonverbal features hierarchically function as “superordinate” or “subordinate” in sensory-perceptual dimensions representing emotions corresponding with verbal features. We focused on sadness as a target emotion and conducted a picture-word congruency judgment experiment. This study used 16 bodily-expression photographs (four-level trunk inclinations × four-level hand-arm postures) as sensory-perceptual features and 32 crying-related words as verbal features that prototypically represent sadness. Forty-eight participants assessed congruency concerning all combinations between bodily-expression pictures and crying-related words. Using a network graph analysis, bodily expressions were classified into three communities based on congruence ratings: the dominant bodily-expression community showed the highest verbal congruency composed of around-eye and overall-face hand-arm postures, irrespective of trunk inclination. Within this dominant community, trunk inclination subordinately modulated picture-word congruency according to bodily-activation properties. These findings support a feature-based representation of emotion through corresponding hierarchical structures between verbal and nonverbal features.

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Data Availability

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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Acknowledgements

We gratefully acknowledge the work of participants. We are also grateful to the reviewers for their valuable comments. We would like to thank Rika Yanase for her support and Editage for English language editing. This work was financially supported by JSPS KAKENHI Grant Number JP 20 K14143.

Funding

This work was financially supported by JSPS KAKENHI (Grant Number: JP 20 K14143).

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Contributions

MS and TS designed the experiments. MS performed the survey. MS and TS analyzed the data. MS wrote the manuscript in consultation with TS. All authors have discussed the results and contributed to the final manuscript.

Corresponding author

Correspondence to Mariko Shirai.

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Research Involving Human Participants

The experimental protocol was approved by the University Institutional Ethics Board of the first author’s university and was conducted in accordance with the 1975 Helsinki Declaration and its later amendments.

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All participants provided informed consent prior to completing the survey.

Competing Interests

All authors declare that they have no conflicts of interest.

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Shirai, M., Soshi, T. Hierarchical memory representation of verbal and nonverbal features for emotion. Curr Psychol 42, 21298–21309 (2023). https://doi.org/10.1007/s12144-022-03200-0

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  • DOI: https://doi.org/10.1007/s12144-022-03200-0

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