Preregistration increases the informativeness of your data for theories

Theories predict observations. Observations are either consistent or inconsistent with the theory that that implied the observations. Observations that are consistent with the theory are said to corroborate the theory. Observations that are inconsistent with the theory should cast doubt on the theory, or cast doubt on one of the premises of the theory. ThereContinue reading “Preregistration increases the informativeness of your data for theories”

hostile priming effects seem to be robust

In 1979, Srull & Wyer published a study wherein participants were presented with a series of 4 words from which they had to construct grammatically correct 3-word phrases. Some phrases described aggressive behaviors (i.e., break his leg). Later, participants read a story about the day in the life of a man named Donald. In thisContinue reading “hostile priming effects seem to be robust”

Getting a feel for equivalence hypothesis testing

A few weeks ago, Daniel Lakens posted an excellent blog about equivalence hypothesis testing (http://daniellakens.blogspot.com/2016/05/absence-of-evidence-is-not-evidence-of.html). Equivalence hypothesis testing is a method to use frequentist statistical analyses (specifically, p-values) to provide support for a null hypothesis. Briefly, Lakens describes a form of equivalence hypothesis testing wherein the “null hypothesis” is a range of effects that are consideredContinue reading “Getting a feel for equivalence hypothesis testing”

Measuring aggression in the lab is hard

Psychologists often study aggression in lab-based settings.  However, some people are unconvinced that commonly-used lab-based aggression paradigms actually demonstrate aggression, which, they claim, limits the evidentiary value of results from studies that use those paradigms.  Rather than dig in heels, I have tried to think of ways that researchers can frame their criticisms to makeContinue reading “Measuring aggression in the lab is hard”