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Posts uit oktober, 2014 tonen

ROCing the Boat: When Replication Hurts

Though failure to replicate presents a serious problem, even highly-replicable  results may be consistently and dramatically misinterpreted if dependent measures are not carefully chosen. This sentence comes from a new paper by Caren Rotello, Evan Heit, and Chad DubĂ© to be published in Psychonomic Bulletin & Review.   Replication hurts in such cases because it reinforces artifactual results. Rotello and colleagues marshal support for this claim from four disparate domains: eyewitness memory, deductive reasoning, social psychology, and studies of child welfare. In each of these domains researchers make the same mistake by using the same wrong dependent measure. Common across these domains is that subjects have to make detection judgments: was something present or was it not present? For example, subjects in eyewitness memory experiments decide whether or not the suspect is in a lineup. There are four possibilities.              Hit: The subject responds “yes” and the

The Diablog on Replication with Dan Simons

Dan Simons Last year, I had a very informative and enjoyable blog dialogue, or diablog, with Dan Simons about the reliability and validity of replication attempts. Unfortunately, there was never an easy way for anyone to access this diablog. It has only occurred to me today (!) that I could remedy this situation by creating a meta-post. Here it is. In my first post on the topic , I argued that it is important to consider to consider not only the reliability but also the validity of replication attempts because it might be problematic if we try to replicate a flawed experiment.   Dan Simons responded to this, arguing that deviations from the original experiment, while interesting, would not allow us to determine the reliability of the original finding. I then had some more thoughts . To which Dan wrote another constructive response . My final point was that direct replications should be augmented with systematic variations of the original experiment.