Continuing my thoughts on random experiments and what can go wrong:
Another common problem is Attrition, especially situations where the attrition rate is not randomly distributed (if the attrition rate is randomly distributed then you have lost power in your study).
Added by Howard Friedman on June 26, 2018 at 6:00am — No Comments
Before implementing a program, I like to first develop a logic model.
This can be a fast exercise that can lead to insights into the strengths and weaknesses of the program design. There are many different models used and I prefer a simple one with 4 basic parts:
1. Inputs—resources that go into a program including staff, materials, money, equipment, facilities,…Continue
Added by Howard Friedman on June 20, 2018 at 11:53am — No Comments
We tried to do XYZ. Did it make a difference?”
Whether you are in the for-profit world or the not-for profit world, this is a very basic question that many people try to answer.
You could be working at a bank trying to figure out which offer is most appealing to customers, at an online retailer figuring out which ad display gets the most clicks, at the Department of Education trying to test the effect of smaller class sizes, at the city government office trying to see if the…Continue
Added by Howard Friedman on February 20, 2018 at 5:30am — No Comments