Researchers overturn landmark study on the replicability of psychological science

From Science Daily:

ScreenHunter_1753 Mar. 06 19.58In an attempt to determine the replicability of psychological science, a consortium of 270 scientists known as The Open Science Collaboration (OSC) tried to replicate the results of 100 published studies. More than half of them failed, creating sensational headlines worldwide about the “replication crisis” in psychology.

But an in-depth examination of the data by Daniel Gilbert (Edgar Pierce Professor of Psychology at Harvard University), Gary King (Albert J. Weatherhead III University Professor at Harvard University), Stephen Pettigrew (doctoral student in the Department of Government at Harvard University), and Timothy Wilson (Sherrell J. Aston Professor of Psychology at the University of Virginia) has revealed that the OSC made some serious mistakes that make this pessimistic conclusion completely unwarranted:

The methods of many of the replication studies turn out to be remarkably different from the originals and, according to Gilbert, King, Pettigrew, and Wilson, these “infidelities” had two important consequences.

First, they introduced statistical error into the data which led the OSC to significantly underestimate how many of their replications should have failed by chance alone. When this error is taken into account, the number of failures in their data is no greater than one would expect if all 100 of the original findings had been true.

Second, Gilbert, King, Pettigrew, and Wilson discovered that the low-fidelity studies were four times more likely to fail than were the high-fidelity studies, suggesting that when replicators strayed from the original methods, they caused their own studies to fail.

More here.