Publications – Daiil Jun

This page lists all papers published by Daiil Jun, organized by year of publication. Click a paper’s title to visit the publisher page and access the official version. Use Abstract to reveal the summary, Citation for the APA 7th-edition reference, and BibTeX to view the BibTeX entry. Clicking the link a second time will close the display again. Preprint links to a free author version (not the final typeset copy), and Materials leads to an open repository with data, code, and other open-science resources. The code used in this page was generated by my advisor Dr. Girard.

2025

Beyond general food craving: sex differences in food-specific craving identified using item response theory

Jun, Joo & Fazzino
Frontiers in Psychology

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BackgroundFood craving plays a significant role in food choice and excess energy intake. While prior research has predominantly examined food craving as a general construct (e.g., craving for foods overall), this approach may obscure important variability in craving for specific foods. The current study aimed to address this limitation by examining craving for specific foods (food-item level) and examining differences across sex in food item craving, while controlling for overall food craving.MethodsThe sample (N = 583) was collected via crowdsourcing. The Food Craving Inventory was used to assess craving for 28 food items. Using item response theory (IRT), a partial credit model was employed to investigate which food item was easier or more commonly craved, while holding overall food craving level constant across participants. Differential item functioning (DIF) analysis identified sex differences in craving for specific food items, with effect sizes calculated to interpret the magnitude of DIF.ResultsThe partial credit model revealed that pizza and chocolate were the easiest or most commonly craved, while gravy and cornbread were the most difficult to crave. DIF analysis suggested that savory items were more difficult (or less commonly) craved among females with medium effect sizes (i.e., Cohen's D) ranging from 0.53 to 0.80, whereas sweets were more difficult for males to crave, with effect sizes ranging from 0.42 to 0.49.ConclusionFindings indicated that food craving may vary depending on specific foods and sex.

@article{jun_beyond_2025, title = {Beyond general food craving: sex differences in food-specific craving identified using item response theory}, volume = {16}, url = {https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2025.1588999/full}, doi = {10.3389/fpsyg.2025.1588999}, journal = {Frontiers in Psychology}, author = {Daiil Jun and Sean Joo and Tera L. Fazzino}, month = {jun}, year = {2025}, note = {Last visited on 09/17/2025} }

Examination of hyper-palatable foods and their nutrient characteristics using globally crowdsourced data

Jun, Knowles & Fazzino
PLOS ONE

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Sentiment Analysis of Naturalistic Speech Using Open-Weight Large Language Models

Girard, Jun, Ong, Liebenthal & Baker
OSF

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Artificial intelligence is increasingly used to analyze emotion in text, but its performance on naturalistic speech remains poorly understood. We evaluated 20 large language models (LLMs), ranging from 1 to 120 billion parameters, on their ability to estimate fine-grained sentiment in transcripts of naturalistic speech. All models were open-weight, meaning their parameters are publicly available and can be run locally without reliance on cloud services. Two datasets were used: the Stanford Emotional Narratives Dataset, autobiographical stories from community participants, and the Bipolar Longitudinal Study, daily audio journals from outpatients with severe mental illness. Human sentiment ratings served as the reference, and models were benchmarked against both individual human agreement and lexicon-based tools (LIWC, VADER). Results showed a three-tier accuracy pattern: small models performed at or below baseline tools, mid-sized models (7-30 billion parameters) matched human agreement, and larger or optimized models exceeded it. Accuracy improved with scaling up to {\textasciitilde}12 billion, after which gains plateaued, highlighting diminishing returns beyond mid-sized architectures. Performance was robust to transcription source, indicating AI transcription error did not impair accuracy. Fairness analyses showed overall accuracy was equitable across demographic groups, though modest disparities appeared in prediction consistency by participant race and education. These findings demonstrate that recent open-weight LLMs can match or surpass human-level performance in sentiment analysis of naturalistic speech while running efficiently on affordable workstation hardware. These advances open opportunities for studying emotional dynamics in daily life and developing privacy-preserving tools for clinical research.

@misc{girard_sentiment_2025, title = {Sentiment {Analysis} of {Naturalistic} {Speech} {Using} {Open}-{Weight} {Large} {Language} {Models}}, url = {https://osf.io/n7vrc_v1}, doi = {10.31234/osf.io/n7vrc_v1}, publisher = {OSF}, author = {Jeffrey Girard and Daiil Jun and Desmond Ong and Einat Liebenthal and Justin Baker}, month = {sep}, year = {2025}, note = {Last visited on 09/18/2025} }

The role of hyper-palatable foods in energy intake measured using mobile food photography methodology

Jun, Girard, Martin & Fazzino
Eating Behaviors

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Objective Hyper-palatable foods (HPF) contain nutrient combinations that are hypothesized to maximize their rewarding effects during consumption. Due to their strong reinforcing properties, HPF are hypothesized to lead to greater energy intake within a meal. However, this premise has not been tested in free-living conditions. The current study examined the association between within-meal HPF intake and 1) measured energy intake and 2) self-reported overeating, assessed within eating occasions using smartphone-based food photography methodology. Methods A total of 29 participants reported food intake and eating experiences (N=345 total eating occasions) in real-time for 4 days using smartphone-based food photography methodology. HPF were identified using a standardized definition. Bayesian multilevel modeling was conducted to investigate the within-person effects of proportional calorie intake from HPF (\%kcal from HPF) on total energy intake and subjective overeating. Pre-meal hunger and proportional energy intake from high energy dense (HED) foods were included as covariates. Results Results revealed that when participants consumed more \%kcal from HPF than their average, they consumed greater total energy during eating occasions, even when controlling for pre-meal hunger and \%kcal from HED foods (median β = 0.09, 95\% HDI [0.02, 0.16], pd. = 99.56\%). Additionally, consuming more \%kcal from HPF than average was associated with greater eating despite feeling full, when controlling covariates (median β = 0.15, 95\% HDI [-0.02, 0.34], pd = 96.45\%). Conclusions The findings supported the premise that HPF themselves may yield greater energy intake and eating despite satiation, measured in real-time and free-living conditions.

@article{jun_role_2025, title = {The role of hyper-palatable foods in energy intake measured using mobile food photography methodology}, volume = {57}, url = {https://www.sciencedirect.com/science/article/pii/S1471015325000431}, doi = {10.1016/j.eatbeh.2025.101983}, journal = {Eating Behaviors}, author = {Daiil Jun and Jeffrey M. Girard and Corby K. Martin and Tera L. Fazzino}, month = {apr}, year = {2025}, pages = {101983}, note = {Last visited on 06/09/2025} }

US infant formulas contain primarily added sugars: An analysis of infant formulas on the US market

Rips-Goodwin, Jun, Griebel-Thompson, Kong & Fazzino
Journal of Food Composition and Analysis

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2024

US tobacco companies selectively disseminated hyper-palatable foods into the US food system: Empirical evidence and current implications

Fazzino, Jun, Chollet-Hinton & Bjorlie
Addiction

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Background and aims US tobacco companies owned leading US food companies from 1980 to 2001. We measured whether hyper-palatable foods (HPF) were disproportionately developed in tobacco-owned food companies, resulting in substantial tobacco-related influence on the US food system. Design The study involved a review of primary industry documents to identify food brands that were tobacco company-owned. Data sets from the US Department of Agriculture were integrated to facilitate longitudinal analyses estimating the degree to which foods were formulated to be hyper-palatable, based on tobacco ownership. Setting and cases United States Department of Agriculture data sets were used to identify HPF foods that were (n = 105) and were not (n = 587) owned by US tobacco companies from 1988 to 2001. Measurements A standardized definition from Fazzino et al. (2019) was used to identify HPF. HPF items were identified overall and by HPF group: fat and sodium HPF, fat and sugar HPF and carbohydrates and sodium HPF. Findings Tobacco-owned foods were 29\% more likely to be classified as fat and sodium HPF and 80\% more likely to be classified as carbohydrate and sodium HPF than foods that were not tobacco-owned between 1988 and 2001 (P-values = 0.005–0.009). The availability of fat and sodium HPF ({\textgreater} 57\%) and carbohydrate and sodium HPF ({\textgreater} 17\%) was high in 2018 regardless of prior tobacco-ownership status, suggesting widespread saturation into the food system. Conclusions Tobacco companies appear to have selectively disseminated hyper-palatable foods into the US food system between 1988 and 2001.

@article{fazzino_us_2024, title = {{US} tobacco companies selectively disseminated hyper-palatable foods into the {US} food system: {Empirical} evidence and current implications}, volume = {119}, url = {https://onlinelibrary.wiley.com/doi/abs/10.1111/add.16332}, doi = {10.1111/add.16332}, number = {1}, journal = {Addiction}, author = {Tera L. Fazzino and Daiil Jun and Lynn Chollet-Hinton and Kayla Bjorlie}, year = {2024}, pages = {62--71}, note = {Last visited on 01/24/2025} }

2023

Associations between Alcohol-Free Sources of Reinforcement and the Frequency of Alcohol and Cannabis Co-Use among College Freshmen

Jun & Fazzino
International Journal of Environmental Research and Public Health

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Co-use of alcohol and cannabis is common among young adults in the United States. A behavioral economics framework indicates that greater engagement in substance-free sources of reinforcement may be protective against co-use frequency. The current study tested the association between proportionate alcohol-free reinforcement and the frequency of co-use among college freshmen. Participants (N = 86) were freshmen who enrolled in a freshman orientation course and completed surveys at the beginning of the semester. Past month alcohol use, cannabis use, and reinforcement from alcohol-free and alcohol-involved activities were assessed. A zero-inflated Poisson regression was used to test the association between proportionate alcohol-free reinforcement and days of co-use. The results indicated that proportionate alcohol-free reinforcement was negatively associated with co-use days in the count model when controlling for alcohol use days and gender as covariates (β: −3.28, p = 0.016). Proportionate alcohol-free reinforcement did not significantly differentiate individuals who did not engage in co-use in the zero-inflated model (β: −1.68, p = 0.497). The study suggested that greater proportionate alcohol-free reinforcement may be associated with lower engagement in the co-use of alcohol and cannabis among young adults. Increasing engagement in alcohol-free sources of reinforcement may be considered a target for co-use prevention or harm reduction efforts.

@article{jun_associations_2023, title = {Associations between {Alcohol}-{Free} {Sources} of {Reinforcement} and the {Frequency} of {Alcohol} and {Cannabis} {Co}-{Use} among {College} {Freshmen}}, volume = {20}, url = {https://www.mdpi.com/1660-4601/20/4/2884}, doi = {10.3390/ijerph20042884}, number = {4}, journal = {International Journal of Environmental Research and Public Health}, author = {Daiil Jun and Tera L. Fazzino}, month = {jan}, year = {2023}, pages = {2884}, note = {Last visited on 09/17/2025} }

2022

Eating-disorder psychopathology in female athletes and non-athletes: A meta-analysis

Chapa, Johnson, Richson, Bjorlie, Won, Nelson, Ayres, Jun, Forbush, Christensen & Perko
International Journal of Eating Disorders

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Objective There is ongoing discussion about whether sports participation is a risk or protective factor for eating disorders (EDs). Research is mixed, with some studies suggesting that athletes have higher mean levels of ED psychopathology compared to nonathletes, while other studies suggest the opposite effect or no differences. The purpose of the current meta-analysis was to identify whether female athletes reported higher mean levels of ED psychopathology compared to nonathletes. Method Following PRISMA guidelines, we identified 56 studies that reported ED psychopathology for female athletes and nonathletes. A three-level random-effects model of between- and within-study variance was completed for the following outcome variables: overall ED psychopathology, body dissatisfaction, drive for thinness, restricting, and loss-of-control eating. Results Athletes reported lower levels of body dissatisfaction compared to nonathletes (g = −.21, p {\textless} .0001). Athletes and nonathletes reported similar levels of overall ED psychopathology, drive for thinness, restricting, and loss-of-control eating on average. Sport type significantly moderated standardized mean difference effect sizes of ED psychopathology in athletes versus nonathletes. Effect sizes comparing levels of drive for thinness, restricting, and loss-of-control eating in athletes versus nonathletes were larger for studies with athletes participating in aesthetic/lean sports compared to nonaesthetic/nonlean sports. Discussion Findings from this meta-analysis could inform future ED prevention and treatment in female athletes by providing further evidence that athletes in aesthetic/lean sports may report higher levels of ED psychopathology. Participating in nonaesthetic/nonlean sports may be a protective factor for experiencing less body dissatisfaction. Public Significance Statement The current meta-analysis summarized findings from 56 studies that assessed levels of disordered eating, body dissatisfaction, dietary restricting, and loss-of-control eating in female athletes and nonathletes. Athletes reported lower levels of body dissatisfaction compared to nonathletes, highlighting that participation in sport could have some protective factors. Athletes participating in sports that require weight categories (e.g., judo) and sports that emphasize thinness/leanness (e.g., gymnastics and distance running) had higher levels of disordered eating relative to athletes participating in other types of sports that do not emphasize thinness/leanness (e.g., volleyball and basketball).

@article{chapa_eating-disorder_2022, title = {Eating-disorder psychopathology in female athletes and non-athletes: {A} meta-analysis}, volume = {55}, url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/eat.23748}, doi = {10.1002/eat.23748}, number = {7}, journal = {International Journal of Eating Disorders}, author = {Danielle A. N. Chapa and Sarah N. Johnson and Brianne N. Richson and Kayla Bjorlie and Ying Q. Won and Sarah V. Nelson and Joseph Ayres and Daiil Jun and Kelsie T. Forbush and Kara A. Christensen and Victoria L. Perko}, year = {2022}, pages = {861--885}, note = {Last visited on 09/17/2025} }

2020

A validation of the Korean version of the clinical video game addiction test 2.0

Jang, Jun, Lee & Shin
Journal of Rehabilitation Psychology

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References

Chapa, D. A. N., Johnson, S. N., Richson, B. N., Bjorlie, K., Won, Y. Q., Nelson, S. V., Ayres, J., Jun, D., Forbush, K. T., Christensen, K. A., & Perko, V. L. (2022). Eating-disorder psychopathology in female athletes and non-athletes: A meta-analysis. International Journal of Eating Disorders, 55(7), 861–885. https://doi.org/10.1002/eat.23748

Fazzino, T. L., Jun, D., Chollet-Hinton, L., & Bjorlie, K. (2024). US tobacco companies selectively disseminated hyper-palatable foods into the US food system: Empirical evidence and current implications. Addiction, 119(1), 62–71. https://doi.org/10.1111/add.16332

Girard, J., Jun, D., Ong, D., Liebenthal, E., & Baker, J. (2025). Sentiment Analysis of Naturalistic Speech Using Open-Weight Large Language Models. OSF. https://doi.org/10.31234/osf.io/n7vrc_v1

Jang, S., Jun, D., Lee, M., & Shin, S. (2020). A validation of the Korean version of the clinical video game addiction test 2.0. Journal of Rehabilitation Psychology, 27(4), 67–82.

Jun, D., & Fazzino, T. L. (2023). Associations between Alcohol-Free Sources of Reinforcement and the Frequency of Alcohol and Cannabis Co-Use among College Freshmen. International Journal of Environmental Research and Public Health, 20(4), 2884. https://doi.org/10.3390/ijerph20042884

Jun, D., Girard, J. M., Martin, C. K., & Fazzino, T. L. (2025). The role of hyper-palatable foods in energy intake measured using mobile food photography methodology. Eating Behaviors, 57, 101983. https://doi.org/10.1016/j.eatbeh.2025.101983

Jun, D., Joo, S., & Fazzino, T. L. (2025). Beyond general food craving: Sex differences in food-specific craving identified using item response theory. Frontiers in Psychology, 16. https://doi.org/10.3389/fpsyg.2025.1588999

Jun, D., Knowles, K., & Fazzino, T. L. (2025). Examination of hyper-palatable foods and their nutrient characteristics using globally crowdsourced data. PLOS ONE, 20(6), e0325479. https://doi.org/10.1371/journal.pone.0325479

Rips-Goodwin, A. R., Jun, D., Griebel-Thompson, A., Kong, K. L., & Fazzino, T. L. (2025). US infant formulas contain primarily added sugars: An analysis of infant formulas on the US market. Journal of Food Composition and Analysis, 141, 107369. https://doi.org/10.1016/j.jfca.2025.107369