Category Archives: modelling

Modelling – some conceptual foundations

Posted on May 8, 2013 by robayedavies

We have discussed the relationships between pairs of variables, we will now move on to analyzing our data using linear regression. Slides on regression can be downloaded here. You will see in those slides that I rely very heavily on … Continue reading →

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Modelling – next steps

Posted on May 7, 2013 by robayedavies

Having dwelt on the relationships between pairs of variables, both in terms of scatterplot depictions and, lately, in terms of correlations, we can move on to the real core of our focus in analyzing psycholinguistic data: linear regression. Creative commons … Continue reading →

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Modelling – examination correlations: advanced scatterplots

Posted on May 4, 2013 by robayedavies

This post will focus exclusively on the relationships between pairs of variables. We will be looking at the item norms data, though you might want to practice the R procedures we deploy on the subjects data (see earlier posts here, … Continue reading →

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Modelling – examining correlations: first, look at predictor distributions

Posted on May 4, 2013 by robayedavies

This post follows on from the previous post, concerning the examination of variable distributions. It is always useful to plot the distribution of variables like item attributes e.g. item length in letters. One important benefit of doing so is identifying … Continue reading →

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Modelling – examining correlations: first, look at predictor distributions

Posted on May 4, 2013 by robayedavies

This post will take a more in-depth look at the relationships between variables. A key property of experimental data is that we measure attributes – characteristics of people,  stimuli, and behaviour – and that those measurements (the numbers) vary. Numbers … Continue reading →

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Modelling – examining the correlations between predictor variables

Posted on May 3, 2013 by robayedavies

This post will consider how to explore the relationship between a set of variables: variables that we will ultimately use in a mixed-effects analysis of lexical decision data. Most of the analyses we will be doing will examine whether observed … Continue reading →

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Modelling – moving on

Posted on May 3, 2013 by robayedavies

Creative commons – flickr – Florida Memory: Young girl jumping on a trampoline at the Sarasota High School Sailor Circus We are now going to move into a new phase for these posts. We are heading toward a consideration of … Continue reading →

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Getting started – statistical concepts – correlations

Posted on April 23, 2013 by robayedavies

As we advance through the capabilities of R, we will increasingly take on the development of understanding of key statistical concepts. I have uploaded some undergraduate-level slides on correlations here: https://speakerdeck.com/robayedavies/r-class-correlations — check them out or, better, read a chapter … Continue reading →

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