The Engage Project is trying to understand what types of messaging could convince people to change their behavior. What were some of the messaging angles they tried and which proved most effective?

As an AI language model, I don't have access to up-to-date information on ongoing studies or projects. However, generally speaking, some messaging angles that have been proven effective in changing behavior include:

1. Social norms: Messaging that emphasizes that certain behaviors are common among one's peers can be effective in encouraging people to adopt those behaviors. For example, a message that says "9 out of 10 people recycle their plastic bottles" can encourage others to do the same.

2. Consequences: Messages that emphasize the negative consequences of not adopting a certain behavior can be effective. For example, a message that says "Smoking increases your risk of developing lung cancer" can encourage people to quit smoking.

3. Incentives: Messages that offer a tangible reward for adopting a certain behavior can be effective. For example, a message that says "Sign up for our recycling program and receive a $10 gift card" can encourage people to recycle.

4. Emotional appeals: Messages that evoke emotions like fear, guilt, or empathy can be effective in encouraging behavior change. For example, a message that shows the impact of littering on wildlife can encourage people to dispose of their trash properly.

5. Repetition: Repeated exposure to messaging can increase the likelihood of behavior change. For example, an advertising campaign that airs the same message multiple times can be more effective than a single ad.

Ultimately, the most effective messaging angle will depend on the behavior being targeted and the audience being reached.