the subjects completed the questionnaires

variable self-control was measured by the self-control Questionnaire. it has 36 items that were rated on a 5-point scale (from 1 not at all like me to 5 very much like me). it was completed by the participants.

variable of humor style was measured by the Questionnaire of humor style. it HSQ included 32-item measures humor styles on a 7-point Likert scale ranging from "strongly disagree (1)"to "strongly agree(7)". HSQ measure the four humor styles of affiliative, self-enhancing, aggressive, and self-defeating. it was completed by the participants.

the variable of risk-taking was measeured by Domain-Specific Risk-Taking (DOSPERT) scale. DOSPERT is 30- items that measure risks in 5 fields: health/safety, social, ethical, financial, and recreational. Each item is assessed twice, one time was rated items based on perceived risk and next time was rated same items based on likelihood engage in the risky. it was completed by the participants.

Responses are give with using a 7-point rating scale ranging from1 (Extremely Unlikely) to 7 (Extremely Likely). Higher scores indicate greater risk taking in the domain of the subscale.

the risk-perception scale evaluates the respondents' gut level assessment of how risky each behavior is on a7-point rating scale ranging from 1 (Not at all) to 7 (Extremely Risky). Ratings are again added across all items of a given subscale to obtain subscale scores, with higher scores suggesting perceptions of greater risk in the domain of the subscale