Abstract
Background/objectives
Previous research indicates that youth with obesity exhibit deficits in executive functioning (EF), which often take the form of impaired response inhibition. One aspect of EF not previously studied in obesity is the adaptive process known as retrieval-induced forgetting (RIF), the suppression/inhibition of intrusive or non-target items by the retrieval of specific items from memory. The present study investigated if child or adolescent obesity disrupts the ability to inhibit retrieval of intrusive memories.
Subjects/methods
We compared the manifestation of RIF in children (ages 8–12) and adolescents (ages 13–18) as a function of their weight status and sex. We also evaluated the effects of these variables on simple recall of items from episodic memory under conditions where competition from intrusive items was reduced.
Results
Children with obesity did not demonstrate significant RIF, whereas RIF was exhibited by preteens without obesity and by teenage participants with- and without obesity (Weight Status × Age Group interaction p = 0.028). This pattern of results did not differ as a function of sex for either age group. No differences in episodic memory were found. Additional analyses using Age as continuous covariate (and not as a nominal group) comparing participants who exhibited RIF with those who did not, found that the no RIF group consumed fast-food meals more frequently (p = 0.024) and had higher percentages of total body adiposity and android fat compared to the RIF group (p’s < 0.05).
Conclusions
The findings expand what is known about the effects of childhood obesity on cognitive functioning, identify impaired RIF with specific behavioral and dietary factors and increased adiposity, and suggest the possibility that impairments in the ability to inhibit intrusive memories of food and eating may contribute to poor early-life weight control.
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Acknowledgements
We thank the participants and their parents for their involvement in this trial.
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TLD, NRK, MTK, and JAY designed the study; all authors (TLD, ER, EAK, KGD, LMF, MNP, SBY, AZ, NRK, LMS, MTK, AS, SIB, AH, KYC, and JAY) contributed to data collection; TLD conducted data analysis and interpretation, completed the literature search, and with JAY wrote the first draft of the paper and generated the figures. All authors (TLD, ER, EAK, KGD, LMF, MNP, SBY, AZ, NRK, LMS, MTK, AS, SIB, AH, KYC, and JAY) contributed to writing the paper and had final approval of the submitted versions. Dr Sabrina Jones and Dr Lauren McGrath were consulted about data analysis and the distractor task used in the study. This work was supported by Intramural Research Program (NICHD grant number ZIA-HD00641; JAY).
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The authors report no competing interests for the present work. JAY reports grant support for unrelated projects examining pharmacological treatments of rare syndromes causing obesity from Rhythm Pharmaceuticals Inc. and Soleno Therapeutics, Inc.
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Davidson, T.L., Ramirez, E., Kwarteng, E.A. et al. Retrieval-induced forgetting in children and adolescents with and without obesity. Int J Obes 46, 851–858 (2022). https://doi.org/10.1038/s41366-021-01036-5
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DOI: https://doi.org/10.1038/s41366-021-01036-5