The sample of this cluster randomized controlled experimental study consisted of 2nd year university students (n=116) training in Faculty of Economics and Administrative Sciences (FEAS) and Hasan Ferdi Turgutlu Faculty of Technology (HFTFT) from the faculties of Manisa Celal Bayar University (MCBU) between February-Semptember 2019. Among the faculties in MCBU, simple random sampling was used to draw lots, with the first lot being assigned to FEAS as the intervention group (IG), and the second lot being assigned to HFTFT as the control group (CG) . Among seven departments in FEAS and four departments in the HFTFT, simple random sampling was used to draw lots again. The Department of Econometrics from the FEAS was assigned as the IG and Mechatronics Engineering from HFTFT was assigned as the CG. The planned visual education based Health Belief Model was given.

No attempt was made by researcher during the study. Only data were collected. At the end of the study, the planned visual education based Health Belief Model was given and all students continued in the study were given key rings with pictures about sun protection designed by the researchers.

The students in IG were administered the planned visual education based on Health Belief Model for a period of seven months.

The education materials were a PowerPoint presentation, a skin cancer model, videos titled "Dear 16 years old me", "Mr. Sun", a brochure, and 3 posters.

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Developed by Dogan and Caydam (2021), the scale consists of 26 items and 5 sub-dimensions (perceived susceptibility, perceived benefit, perceived severity, perceived barriers, and self-efficacy). The HBMSSC is a five-point Likert-type scale, and each item is answered from "disagree=1" to "strongly agree=5". The total Cronbach's alpha coefficient of the scale is 0.86, and for the sub-dimensions it is 0.89; 0.79; 0.77; 0.65 and 0.86, respectively. The "perceived barriers" sub-dimension of the scale is reverse coded. The scale does not have a total score, and each sub-dimension is scored within itself. Higher "perceived susceptibility, "perceived benefit, "perceived severity", and "self-efficacy" scores indicate higher perceived susceptibility, perceived benefit, perceived severity, and self-efficacy

Developed by Dogan and Caydam (2021), the scale consists of 26 items and 5 sub-dimensions (perceived susceptibility, perceived benefit, perceived severity, perceived barriers, and self-efficacy). The HBMSSC is a five-point Likert-type scale, and each item is answered from "disagree=1" to "strongly agree=5". The total Cronbach's alpha coefficient of the scale is 0.86, and for the sub-dimensions it is 0.89; 0.79; 0.77; 0.65 and 0.86, respectively. The "perceived barriers" sub-dimension of the scale is reverse coded. The scale does not have a total score, and each sub-dimension is scored within itself. Higher "perceived susceptibility, "perceived benefit, "perceived severity", and "self-efficacy" scores indicate higher perceived susceptibility, perceived benefit, perceived severity, and self-efficacy

Developed by Dogan and Caydam (2021), the scale consists of 26 items and 5 sub-dimensions (perceived susceptibility, perceived benefit, perceived severity, perceived barriers, and self-efficacy). The HBMSSC is a five-point Likert-type scale, and each item is answered from "disagree=1" to "strongly agree=5". The total Cronbach's alpha coefficient of the scale is 0.86, and for the sub-dimensions it is 0.89; 0.79; 0.77; 0.65 and 0.86, respectively. The "perceived barriers" sub-dimension of the scale is reverse coded. The scale does not have a total score, and each sub-dimension is scored within itself. Higher "perceived susceptibility, "perceived benefit, "perceived severity", and "self-efficacy" scores indicate higher perceived susceptibility, perceived benefit, perceived severity, and self-efficacy