severe testing or severe sabotage? Christian Roberts and the book slasher.

severe testing or severe sabotage? [not a book review]   I came across this anomaly on Christian Roberts’s blog.  Last week, I received this new book of Deborah Mayo, which I was looking forward reading and annotating!, but thrice alas, the book had been sabotaged: except for the preface and acknowledgements, the entire book is printed upside down [a […]

Multilevel models with group-level predictors

Kari Lock Morgan writes: I’m writing now though with a multilevel modeling question that has been nagging me for quite some time now. In your book with Jennifer Hill, you include a group-level predictor (for example, 12.15 on page 266), but then end up fitting this as an individual-level predictor with lmer. How can this […]

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He’s a history teacher and he has a statistics question

Someone named Ian writes: I am a History teacher who has become interested in statistics! The main reason for this is that I’m reading research papers about teaching practices to find out what actually “works.” I’ve taught myself the basics of null hypothesis significance testing, though I confess I am no expert (Maths was never […]

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An actual quote from a paper published in a medical journal: “The data, analytic methods, and study materials will not be made available to other researchers for purposes of reproducing the results or replicating the procedure.”

Someone writes: So the NYT yesterday has a story about this study I am directed to it and am immediately concerned about all the things that make this study somewhat dubious. Forking paths in the definition of the independent variable, sample selection in who wore the accelerometers, ignorance of the undoubtedly huge importance of interactions […]

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Young Investigator Special Competition for Time-Sharing Experiment for the Social Sciences

Sociologists Jamie Druckman and Jeremy Freese write: Time-Sharing Experiments for the Social Sciences is Having A Special Competition for Young Investigators Time-sharing Experiments for the Social Sciences (TESS) is an NSF-funded initiative. Investigators propose survey experiments to be fielded using a nationally representative Internet platform via NORC’s AmeriSpeak Panel (see http:/tessexperiments.org for more information). While […]

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Ethics in statistical practice and communication: Five recommendations.

I recently published an article summarizing some of my ideas on ethics in statistics, going over these recommendations: 1. Open data and open methods, 2. Be clear about the information that goes into statistical procedures, 3. Create a culture of respect for data, 4. Publication of criticisms, 5. Respect the limitations of statistics. The full […]

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