The key theme is response to people in need. Piliavin investigated this using 'victims' that were either drunk or walked with a cane. In Piliavin's study, they had the 'victim' enter the subway and after 70 seconds staggered forward and collapsed in front of passengers in the critical area to test and see if participants would help the 'victim'. The person with the cane got help 100% of the time, while the drunk person only got help 81% of the time, showing that if a person has a visible disability, they will always get help, but if they're drunk, 19% of the time they won't get help