the main purposes of this survey are to confirm the problem and to find the relationship between the drinkers' behavior and the negative effects of coffee. the researchers developed three items for the questionnaire based on previous studies. The first item in the questionnaire is aimed at finding if the participants usually drink coffee or not. the second item was designed based on the findings of Stanton that drinking a lot of coffee can cause delay in cognition.the last item was designed based on the information by Jones that caffeine in coffee can lead to headaches for some people because it induces vasoconstriction of the blood vessels in the brain which can give a person headache