What motivates people to join -- and stick with -- citizen science projects?

Long-term participants in citizen science motivated by project mission and goals More at
https://www.nsf.gov/discoveries/disc_summ.jsp?cntn_id=298936&WT.mc_id=USNSF_1
This is a Research News item.

Source: NSF Discoveries - July 26, 2019 Category: Science Source Type: research