Information For
Students
Parents
Teachers
Administrators
Information About
Grants & Contracts
Financial Aid
Research & Statistics
Policy
Programs
A r c h i v e d I n f o r m a t i o n
Evidence-Based Education (EBE)
Student Achievement and School Accountability Conference
October 2002
|
|
Text (slide 17):
Why is randomization critical?
Assures that the participants being compared have the same characteristics across the conditions
Rules of chance mean that the smart, motivated, experienced, etc. have the same probability of being in condition 1 as in condition 2
Without randomization, differences between two conditions may result from pre-existing difference in the participants and subtle selection biases
| 
| 
