1. ACT. (2007). The ACT technical manual. Iowa City, IA: Author.
2. ACT. (2008). The Student Readiness Inventory: SRI user's guide. Iowa City, IA: Author.
3. ACT. (2010). The national collegiate retention and persistence to degree rates. Iowa City, IA: Author.
4. 2. Random-Effects Modeling of Categorical Response Data
5. AllenJ. (2013). Updating the ACT College Readiness Benchmarks(ACT Research Report No. 2013-6).Iowa City, IA: ACT, Inc.