The negative perception about the bathroom. To see and smell. Allows students to access the toilet, because the smell might make sense if the bathroom is not clean, so it affects the use of the bathroom of the students is the student doesn't want to gain access to the bathroom.
The negative perceptions about the bathrooms, sight and smell that students do not go to the toilet. The stench might make sense if the bathroom is not clean, thus affecting the bathroom of the student is not a student wants to use the bathroom.
Perceived negative about the toilet, sight and smell, make the students don't want to go to the bathroom. Because it may make feel unclean toilet, thus affecting the use of คือนักศึกษา students don't want to use the bathroom.