Date Modified: March 13, 2020
Re-review
In 2019, a re-review of two studies (Heckman and Karapakula 2019a and 2019b) that looked at participants through age 50 resulted in the same final rating of Effective. Studies looking at participants’ early years in Perry Preschool Project were not included in the Evidence Base because the reported statistical analyses were not sufficiently detailed and the results for boys and girls were examined and presented separately. As consistent with the CrimeSolutions review process, subgroups are not scored, only the full study sample is scored.
Date Created: June 14, 2011