Read the text below and answer the questions:
1. What is the Kindness Test, and what was its purpose?
2. Why do some people hesitate to offer help or carry out kind acts for strangers, according to the author?
3. Which personality traits were associated with kindness, according to the Big Five personality scale used in the Kindness Test?
4. What are some potential barriers to carrying out kind acts, and how can they be overcome?