As (kind of) promised in my post on ‘a general clustering algorithm’, I have now generated a multivariate data set based on a known number of clusters each with a known (and distinct) mean vector and covariance matrix. In that post, I … Continue reading
For the past few months, I’ve been working with David Landy on analyzing and writing up a series of number line judgment experiments. Participants in these experiments see very large numbers (e.g., 783,000,000) and respond by indicating the appropriate location on … Continue reading
In 1994 or 1995, my brother and his girlfriend visited my mother in Atlanta*. They went to Stone Mountain and had a custom postcard made. They sent this postcard to me while I was living in Prescott, Arizona. Earlier this year, … Continue reading
Suppose you have some three-dimensional categorical data and you’ve come up with some clever way to model the underlying probabilities. Let’s say, for example, that you have data from a categorization experiment in which there are three possible responses to m stimuli, … Continue reading
A few months ago, I scanned a mess of photographs that had been sitting in a box for years. I only just started doing something with them when I changed things up around here and started blogging about my trip … Continue reading
I’m working on analyzing a large-ish multivariate data set, trying to figure out (a) if the elements in the data set cluster, (b) how many clusters there are, and (c) what the structure of those clusters is. I am not … Continue reading
The first segment of the fourth episode of season three of Radiolab is about how the use of memory is an active process, how memories are altered by the very act of recollection. I was reminded of this in my … Continue reading
