Tag: NHST
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Does calling a study “under powered” help or hinder criticism?
A common criticism of research (past and present) is that it’s “under powered” or “has low power”. What this typically means is the study doesn’t have many participants (typically between 5 and 40) and so has low statistical power for most effect sizes in psychology . But something being “under powered” only makes sense when…
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ReproducibiliTea interview
I was recently interviewed by Amy Orben, Sophia Crüwell, and Sam Parsons for their excellent podcast ‘ReproducibiliTea’. We talked a little bit about myself before getting into some more interesting topics: open science, educational psychology, how the two interact (or how they don’t), and the developing nuance in understanding around open science practices. The link…
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Should you calculate a p-value when there isn’t randomisation?
The thought behind this question was prompted by reading [zotpressInText item=”{TIBTBKWD}” format=”%a% (%d%, %p%)”], which argues against frequentist inferential statistics. One of the arguments refers to an underlying assumption required to compute p-values; they need random sampling. Without this, a p-value is meaningless. But this is rare in social science research [zotpressInText item=”{VRZPC486}” format=”%a% (%d%,…
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You can’t assume a normal distribution for your data with N>30
The central limit theorem (CLT) is one of the most foundational concepts in all probability (Daly, 2013). It is commonly understood as: when the means of a variable with a suitable number of observations is plotted on a graph, it can form a normal distribution. When the data comes from many independent and random events, the sum…
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Paul Meehl on philosophy of science: video lectures and papers
After literally 2 years, I’ve finally finished making notes on Paul Meehl’s philosophy of science lectures. This is the portal to all the different lectures. I’ve also included a single sentence summary of them. They are excellent and I strongly recommend you watch them. However, his papers are the best scientific articles I have ever read…
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Notes on Paul Meehl’s “Philosophical Psychology Session” #12
These are the notes I made whilst watching the video recording of Paul Meehl’s philosophy of science lectures. This is the twelfth and final episode (a list of all the videos can he found here). Please note that these posts are not designed to replace or be used instead of the actual videos (I highly…
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Notes on Paul Meehl’s “Philosophical Psychology Session” #08
These are the notes I made whilst watching the video recording of Paul Meehl’s philosophy of science lectures. This is the eighth episode (a list of all the videos can he found here). Please note that these posts are not designed to replace or be used instead of the actual videos (I highly recommend you…
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Interruptions, gender, social media, and confirmation bias
Interruptions are common in most conversations, but is there are general trend among those talking as to who interrupts whom? Recently David Schmitt tweeted about a paper called “Influence of Communication Partner’s Gender on Language” (Hancock & Rubin, 2014). It gained some traction as it featured a graph purporting to show women interrupt other women more than men. It…
PsychBrief 