H&H Study Timeline

H&H Study was Implemented

3,396 students across 10 Los Angeles public high schools enrolled at baseline to complete their first survey in 9th grade.

Survey Follow-ups

Follow-up surveys were conducted every six months, for a total of 8 waves of data collection. Throughout high school, the H&H Study had over 95% retention rate.

Participants Graduate High School!

After graduation, we proceed to survey students into emerging adulthood.

H&H Wave 9 

First follow-up survey after high school. Online data collection post-grad occurs twice a year.

2021 Today

The H&H study is on Wave 12 of data collection, and will continue until 2023.