| Dependent Variables | Items | Description of Items | Corrected item-total correlation | Reliability (Cronbach’s Alpha) |
| Physical Bullying | Item 1 | How often other students hitting you in school? | 0.57 | 0.73 |
| Item 2 | How often other students kick you in school? | 0.71 | ||
| Item 3 | How often other students pushing you in school? | 0.61 | ||
| Item 4 | How often other students take or breaking your belonging in school? | - | ||
| Item 5 | How often other students making rude hand gesture to you in school? | - | ||
| Verbal Bullying | Item 1 | How often other student making fun and teasing you in a hurtful way in school? | 0.60 | 0.71 |
| Item 2 | How often other students calling you mean names in school? | 0.62 | ||
| Item 3 | How often other students calling mean names about your race and skin in school? | 0.68 | ||
| Item 4 | How often other students calling mean names about your race and skin in school? | 0.73 | ||
| Item 5 | How often other students taunting you in school? | 0.63 | ||
| Relational Bullying | Item 1 | How often other students leave you out on purpose in school? | 0.75 | 0.78 |
| Item 2 | How often other students telling other not to be friends with you in school? | 0.75 | ||
| Item 3 | How often other students spreading rumours about you in school? | 0.72 | ||
| Item 4 | How often other students embarrassing you in school? | 0.71 | ||
| Item 5 | How often other students criticizing you for making you feel bad in school? | 0.75 | ||
| Observation of school block | ||||
| Surveillance | Item 1 | Based on the design of building blocks, the percentage rate allows for the occurrence of bullying | 0.70 | 0.72 |
| Item 2 | Based on the planted element of the plant, the percentage rate allows for visual opportunities towards the school area | - | ||
| Item 3 | Ability or chance of bullies to bully in hidden corners | 0.70 | ||
| Item 4 | Provision of fluorescent lamps either on the bend | 0.68 | ||
| Item 5 | Provision of fluorescent lamps on stairs | 0.75 | ||
| Item 6 | The visual rate of the classroom position can be seen from the direction of the building block | 0.63 | ||
| Item 7 | The visibility of the building blocks can be seen from the teacher’s room | 0.67 | ||
| Item 8 | The visibility of the open spaces with building blocks | 0.69 | ||
| Item 9 | Preparation of CCTV in hidden path/stairs/corners | 0.72 | ||
| Item 10 | The visibility of the activity placement can be seen from the building blocks | 0.65 | ||
| Maintenance | Item 1 | Planting elements in the building block area whether vegetation cover, shrubs, turf grass and trees are well maintained | 0.82 | 0.80 |
| Item 2 | Toilets in the building block are in good condition without graffiti, garbage, damage, and paint on the walls in good condition | 0.81 | ||
| Item 3 | Paint condition in building blocks in good condition without graffiti | 0.74 | ||
| Item 4 | The room door at school is in good shape | 0.77 | ||
| Item 5 | All windows in school are in good condition | 0.77 | ||
| Item 6 | The lane paths of the school are in good condition without graffiti, garbage, damage, and paint on the walls in good condition | 0.72 | ||
| Item 7 | Garbage is well maintained in building blocks | 0.73 | ||