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.

2026

Sentiment Analysis of Naturalistic Speech Using Open-Weight Large Language Models
Girard, Jun, Ong, Liebenthal & Baker
Affective Science
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@article{girard_sentiment_2026, title = {Sentiment Analysis of Naturalistic Speech Using Open-Weight Large Language Models}, doi = {https://doi.org/10.1007/s42761-025-00352-7}, pages = {1--15}, author = {Jeffrey M Girard and Daiil Jun and Desmond C Ong and Einat Liebenthal and Justin T Baker}, year = {2026} }
Testing Affect Regulation Theories of Dreaming
Baber, Hamilton, Girard, Sikka, Watts, Jun, Gratton, Cohen, Quesada, Nichols & others
Sleep
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@article{baber_testing_2026, title = {Testing Affect Regulation Theories of Dreaming}, doi = {https://doi.org/10.1093/sleep/zsag046}, pages = {zsag046}, author = {Garrett R Baber and Nancy A Hamilton and Jeffrey M Girard and Pilleriin Sikka and Amber Watts and Daiil Jun and Matthew KP Gratton and Jamie M Cohen and Anna K Quesada and Elijah C Nichols and {others}}, year = {2026} }

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}, author = {Daiil Jun and Sean Joo and Tera L. Fazzino}, year = {2025}, month = {jun}, note = {Last visited on 12/23/2025} }
Current and Projected Cannabis Demand Predict Future Consumption in Young Adults Who Use Cannabis
Kurnellas, Sutton, Jun, Taylor, Smith, Foxx, Yurasek & Yi
Cannabis
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Objective: Cannabis demand, as measured by the Marijuana Purchase Task ({MPT}), holds associations with concurrent cannabis consumption and associated risks (e.g., cannabis use disorder [{CUD}]). As few studies have examined prospective associations between cannabis demand and future cannabis use, the current study examined this association in young adults who use cannabis. In addition, the present study explored the novel construct of projected future cannabis demand and its associations with future cannabis use. Method: Participants first completed a current Time1 (T1) {MPT}, projected future Time2 (T2) {MPT} (i.e., “three months from now”), and measures of past-month cannabis use frequency and {CUD} symptoms during an initial session. They returned three months later (T2) to complete a current T2 {MPT} and measures of cannabis use and {CUD} symptoms. Results: Measures across the three {MPTs} (observed T1, projected future T2, and observed T2) indicate relatively stability of demand across time and accuracy in projecting future demand. Prospective associations between T1 demand measures and cannabis use were observed, with both observed T1 and projected future T2 demand measures associated with T2 cannabis use frequency. Conclusions: Results of the current study highlight the potential of current and projected future cannabis demand measures to better understand the trajectory of cannabis use in this high-risk population.
@article{kurnellas_current_2025, title = {Current and Projected Cannabis Demand Predict Future Consumption in Young Adults Who Use Cannabis}, url = {https://publications.sciences.ucf.edu/cannabis/index.php/Cannabis/article/view/324}, doi = {10.26828/cannabis/2025/000324}, author = {Rebecca Kurnellas and Cassandra A. Sutton and Daiil Jun and Hailey Taylor and Aaron P. Smith and Ricarda Foxx and Ali M. Yurasek and Richard Yi}, year = {2025}, month = {oct}, note = {Last visited on 10/30/2025} }
Examination of hyper-palatable foods and their nutrient characteristics using globally crowdsourced data
Jun, Knowles & Fazzino
PLOS ONE
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Hyper-palatable foods ({HPF}), characterized by specific nutrient combinations at moderate to high levels (e.g., fat and sodium), have been suggested to increase energy intake and obesity risk due to their strong reinforcing properties. The study examined patterns in {HPF} availability, nutrient characteristics, and overlap with ultra-processed foods ({UPF}) across countries from a globally crowdsourced, open-source dataset. Food data (N = 314229 food items) from 17 countries were analyzed. Compared to the {US}, foods from most European countries examined, as well as Canada and Mexico, were significantly less likely to be identified as {HPF} ({ORs} = 0.70 to 0.93) and had lower \% of calories from fat, sugar, starchy carbohydrates, and sodium compared to {HPF} items from the {US} ({ORs} = 0.76 to 0.98). Across countries, items identified as {HPF} substantially exceeded {HPF} threshold criteria by 70–229\%. Foods identified as being both {HPF} and ultra-processed foods ranged from 33\% (Bulgaria) to 50\% ({US}). Overall, findings from 17 countries across Europe, North America, and South America highlighted foods from the {US} as being more likely to be hyper-palatable relative to most other countries examined. Results highlighted variability in the degree to which foods met criteria as {HFP} and {UPF} across countries.
@article{jun_examination_2025, title = {Examination of hyper-palatable foods and their nutrient characteristics using globally crowdsourced data}, volume = {20}, url = {https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0325479}, doi = {10.1371/journal.pone.0325479}, pages = {e0325479}, number = {6}, author = {Daiil Jun and Kelly Knowles and Tera L. Fazzino}, year = {2025}, month = {jun}, note = {Last visited on 07/09/2025} }
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}, pages = {101983}, author = {Daiil Jun and Jeffrey M. Girard and Corby K. Martin and Tera L. Fazzino}, year = {2025}, month = {apr}, 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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Added sugar consumption is contraindicated for infants {\textless} 2 years old; however added sugars are present in many {US} infant formulas. We examined whether {US} formulas contain primarily added sugars, or whether formulas contain primarily naturally occurring lactose (the sugar in human milk). Data were obtained from the Nutrition Data System for Research and included formulas available on the {US} market in 2022 (N = 73). Formulas were categorized as: standard (n = 31), gentle (n = 27), and lactose-free (n = 15). Differences across formulas were examined using Bayesian modeling. The median percent added sugars were high in standard (M=59.7 \%; {IQR}=22.0), gentle (M=85.0 \%; {IQR}=39.5), and lactose-free formulas (M=90.0 \%; {IQR}=54.3). Gentle formulas had significantly lower proportional lactose ({OR}=0.22, 95 \% {HDI}=[0.11,0.44]
@article{rips-goodwin_us_2025, title = {{US} infant formulas contain primarily added sugars: An analysis of infant formulas on the {US} market}, volume = {141}, url = {https://www.sciencedirect.com/science/article/pii/S0889157525001838}, doi = {10.1016/j.jfca.2025.107369}, pages = {107369}, author = {Audrey R. Rips-Goodwin and Daiil Jun and Adrianne Griebel-Thompson and Kai Ling Kong and Tera L. Fazzino}, year = {2025}, month = {may}, note = {Last visited on 09/17/2025} }

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}, pages = {62--71}, number = {1}, author = {Tera L. Fazzino and Daiil Jun and Lynn Chollet-Hinton and Kayla Bjorlie}, year = {2024}, 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}, pages = {2884}, number = {4}, author = {Daiil Jun and Tera L. Fazzino}, year = {2023}, month = {jan}, 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}, pages = {861--885}, number = {7}, 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}, 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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@article{jang_validation_2020, title = {A validation of the Korean version of the clinical video game addiction test 2.0}, volume = {27}, pages = {67--82}, number = {4}, author = {S Jang and D Jun and M Lee and S Shin}, year = {2020} }

n.d.

Within-Person Symptom Dynamics in Serious Mental Illness: Insights from Daily Self-reports and Audio Journals
Jun, Girard, Chung, Rauch, Liebenthal & Baker
PsyArXiv
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Understanding how clinical symptoms fluctuate within individuals is crucial for developing personalized treatment, yet such dynamic processes are understudied. This study examined how daily self-reports and speech features from audio journals predict monthly, clinician-rated symptoms in a transdiagnostic outpatient sample with affective and psychotic disorders. We identified a seven-factor within-person clinical symptom structure, a more granular perspective than previous between-person models. Bayesian multilevel models revealed that daily fluctuations in both self-reported experiences and objective speech features from audio journals were significantly associated with changes in clinical symptoms. Importantly, model comparisons showed that the optimal temporal window for aggregating daily data varied by symptom domain and data modality. These findings demonstrate the utility of daily self-reports and audio journals for dynamic symptom tracking, and showcase a data-driven approach to investigating the optimal length of daily history for developing personalized monitoring tools in psychiatry.
@misc{jun_within-person_nodate, title = {Within-Person Symptom Dynamics in Serious Mental Illness: Insights from Daily Self-reports and Audio Journals}, doi = {https://osf.io/preprints/psyarxiv/aqnmw_v1}, publisher = {{PsyArXiv}}, author = {Daiil Jun and Jeffrey M Girard and Yoonho Chung and Scott L Rauch and Einat Liebenthal and Justin T Baker} }

References

Baber, G. R., Hamilton, N. A., Girard, J. M., Sikka, P., Watts, A., Jun, D., Gratton, M. K., Cohen, J. M., Quesada, A. K., Nichols, E. C., et al. (2026). Testing affect regulation theories of dreaming. Sleep, zsag046. https://doi.org/https://doi.org/10.1093/sleep/zsag046
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. M., Jun, D., Ong, D. C., Liebenthal, E., & Baker, J. T. (2026). Sentiment analysis of naturalistic speech using open-weight large language models. Affective Science, 1–15. https://doi.org/https://doi.org/10.1007/s42761-025-00352-7
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., Chung, Y., Rauch, S. L., Liebenthal, E., & Baker, J. T. (n.d.). Within-person symptom dynamics in serious mental illness: Insights from daily self-reports and audio journals. PsyArXiv. https://doi.org/https://osf.io/preprints/psyarxiv/aqnmw_v1
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
Kurnellas, R., Sutton, C. A., Jun, D., Taylor, H., Smith, A. P., Foxx, R., Yurasek, A. M., & Yi, R. (2025). Current and projected cannabis demand predict future consumption in young adults who use cannabis. Cannabis. https://doi.org/10.26828/cannabis/2025/000324
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