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Recent Posts
 Getting started — loading data, writing and saving scripts January 16, 2014
 Getting started – getting helped January 16, 2014
 Getting started — Installation of RStudio and some packages + using ggplot() to make a simple plot January 16, 2014
 Postgraduate data analysis and interpretation January 16, 2014
 Mixedeffects modeling — four hour workshop — part IV: LMEs November 5, 2013
Category Archives: Uncategorized
Postgraduate data analysis and interpretation
I am revising my previous posts on the whole process, from getting started with R to using it to do linear modelling and linear mixedeffects modelling. Sunset over the coast, on the road from Ravenglass to Broughton What this revision … Continue reading
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Mixedeffects modeling — four hour workshop — part III: Regression modeling
We completed a study on the factors that influence visual word recognition performance in lexical decision. We then put together a dataset for analysis here. We examined the distribution of interrelation of critical variables in that dataset, acting to transform … Continue reading
Posted in 2.3 LME workshop III/IV, Uncategorized
Tagged ggplot2, LME, ols(), plyr, scatterplot
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Mixedeffects modeling — four hour workshop — part II: Data Exploration
We got our data together in Part I of this workshop, eventually arriving at the collation of a single dataframe in ‘long format’ holding all our data on subject attributes, item attributes and behavioural responses to words in a lexical … Continue reading
Mixedeffects modeling — four hour workshop — part I: Data handling
This post will be one of four in which we go through how to model a multilevel dataset using linear mixedeffects modeling. To begin, we need to collate the data we have gathered in a simple reading experiment but one … Continue reading
Posted in 2.1 LME workshop I/IV, Uncategorized
Tagged csv, data handling, merge, plyr
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Mixed effects – Autumn workshop – practical steps in one hour
For an example analysis, we collated a .csv file of data from a repeated measures lexical decision experiment, which can be downloaded here. The code I have used in running the analysis described in this post can be found here. … Continue reading
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Why R? One hour R workshop
Watching someone else do or talk about computing is boring, as many rubbish and one good film of the past have proved. Still from WarGames (1983), source: imdb Better to do something practical and, here, the task is to evaluate … Continue reading
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Types of sums of squares
https://stat.ethz.ch/pipermail/rhelp/2005April/069923.html http://psych.colorado.edu/wiki/lib/exe/fetch.php?media=labs:learnr:typeiortypeiiiss.pdf http://cran.rproject.org/web/packages/fortunes/vignettes/fortunes.pdf http://imaging.mrccbu.cam.ac.uk/statswiki/FAQ/sstypes http://yihui.name/en/2010/04/rulesofthumbtomeetrgurusinthehelplist/ https://stat.ethz.ch/pipermail/rhelp/2006May/094765.html https://stat.ethz.ch/pipermail/rhelp/2006August/111927.html https://stat.ethz.ch/pipermail/rhelp/2003March/030705.html https://stat.ethz.ch/pipermail/rhelp/2008February/153740.html https://stat.ethz.ch/pipermail/rdevel/2000May/020714.html https://stat.ethz.ch/pipermail/rhelp/2001October/015984.html http://www.stats.ox.ac.uk/pub/MASS3/Exegeses.pdf http://mcfromnz.wordpress.com/2011/03/02/anovatypeiiiiiissexplained/ http://stats.stackexchange.com/questions/23197/typeiiisumofsquaresfromsasandr http://stats.stackexchange.com/questions/6208/shouldiincludeanargumenttorequesttypeiiisumsofsquaresinezanova
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