Document Type



Doctor of Philosophy (PhD)


Dietetics and Nutrition

First Advisor's Name

Dr. Cristina Palacios

First Advisor's Committee Title

Committee chair

Second Advisor's Name

Dr. Fatma Huffman

Second Advisor's Committee Title

Committee member

Third Advisor's Name

Dr. Catherine Coccia

Third Advisor's Committee Title

Committee member

Fourth Advisor's Name

Dr. Changwon Yoo

Fourth Advisor's Committee Title

Committee member


smartphone application, snack quality, diet quality, body weight, snacking behavior, overweight and obese, college students

Date of Defense



College is a challenging period to make healthy food and snack choices and this could lead to poor diet quality and weight gain in the future. The Snackability application (app) was developed using the Social Cognitive Theory for behavior change to help students choose healthy snacks based on the USDA guidelines. The objective of this study was to determine whether the app improved snack, diet quality, and body weight in overweight and obese college students within a two-arm, 12-week randomized controlled trial (RCT). A total of 139 participants completed all baseline measures and were randomized into the control or app groups. Baseline characteristics were similar between groups. Overall, mean age was 21.1 (1.7) years, 84.6% were females, 30.9% were Hispanic, 51.1% had an income less than $50,000, and mean BMI was 30.4 (5.6) kg/m2. Participants in the app group significantly increased snack score at week 4 (P



ORCID 0000-0002-2302-190X

Previously Published In

Prapkree L, Sadjadi M, Huffman F, Palacios C. Development and pilot testing of the Snackability smartphone application to identify healthy and unhealthy snacks. Healthc Inform Res. 2019;25(3):161-172.

Eicher-Miller HA, Prapkree L, Palacios C. Expanding the capabilities of nutrition research and health promotion through mobile-based applications. Adv Nutr. 2021;12(3):1032-1041.

Creative Commons License

Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License.



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