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‘Researcher Degrees of Freedom’

False-Positive Psychology: Undisclosed Flexibility in Data Collection and Analysis Allows Presenting Anything as Significant [I]t is unacceptably easy to publish “statistically significant” evidence consistent with any hypothesis. The culprit is a construct we refer to as researcher degrees of freedom. In the course of collecting and analyzing data, researchers have many decisions to make: Should […]


“Most Popular Infographics you can find around the web”by designer and illustrator Alberto Antoniazzi.

More data tools worth using from Google

Speaking of open data and google tools, see this post from Revolution R: How to use a Google Spreadsheet as data in R.

Google Refine

Tools worth knowing about: Google Refine is a power tool for working with messy data, cleaning it up, transforming it from one format into another, extending it with web services, and linking it to databases like Freebase. A recent discussion on the Polmeth list about the ANES Cumulative File is a setting where I think […]

Reproducibility in Practice

In light of the recent article about drug-target research and replication (Andrew blogged it here) and l’affaire Potti, I have mentioned the “Forensic Bioinformatics” paper (Baggerly & Coombes 2009) to several colleagues in passing this week. I have concluded that it has not gotten the attention it deserves, though it has been discussed on this […]

Parallel JAGS RNGs

As a matter of convention, we usually run 3 or 4 chains in JAGS. By default, this gives rise to chains that draw samples from 3 or 4 distinct pseudorandom number generators. I didn’t go and check whether it does things 111,222,333 or 123,123,123, but in any event the “parallel chains” in JAGS are samples […]

RStudio – new cross-platform IDE for R

The new R environment RStudio looks really great, especially for users new to R. In teaching, these are often people new to programming anything, much less statistical models. The R GUIs were different on each platform, with (sometimes modal) windows appearing and disappearing and no unified design. RStudio fixes that and has already found a […]