Some relevant links:
“The Iron Law Of Evaluation And Other Metallic Rules”, Rossi 1987
“The Efficacy of Psychological, Educational, and Behavioral Treatment: Confirmation From Meta-Analysis”, Lipsey & Wilson 1993
“Randomized Controlled Trials Commissioned by the Institute of Education Sciences Since 2002: How Many Found Positive Versus Weak or No Effects?”, Coalition for Evidence-Based Policy 2013 (excerpts)
“One Hundred Years of Social Psychology Quantitatively Described”, Bond et al 2003
Some relevant links:
“The Iron Law Of Evaluation And Other Metallic Rules”, Rossi 1987
“The Efficacy of Psychological, Educational, and Behavioral Treatment: Confirmation From Meta-Analysis”, Lipsey & Wilson 1993
“Randomized Controlled Trials Commissioned by the Institute of Education Sciences Since 2002: How Many Found Positive Versus Weak or No Effects?”, Coalition for Evidence-Based Policy 2013 (excerpts)
“One Hundred Years of Social Psychology Quantitatively Described”, Bond et al 2003