![](https://blogs.ntu.edu.sg/hp3203-2017-07/files/2017/04/Friends-attitude-18cmdg8.jpg)
Source: “Towards a Cleaner Singapore – Sociology Study on Littering in Singapore” – NEA
![](https://blogs.ntu.edu.sg/hp3203-2017-07/files/2017/04/Friends-Behaviour-14pvjqd.jpg)
Source: “Towards a Cleaner Singapore – Sociology Study on Littering in Singapore” – NEA
The probability of people being influenced to litter is seen at the relative risk where friends’ behaviours result in higher risk (2.73) as compared to the friends’ attitudes towards littering (2.34).