Category Archives: .Interim directions

Picture break

Posted on May 14, 2013 by robayedavies

  Picture taken in San Francisco flower conservatory, a wonderful place with wonderfully informative guides. We will go on to a bit more model checking before considering the random effects formally.

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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 – 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 – selecting data, wrangling data – early (basic) moves

Posted on April 24, 2013 by robayedavies

This post and the few following will switch focus from the ML subject scores database to a database built out of normative data about word attributes, which actually comes in a number of different parts (downloadable at the links). Remember that … Continue reading →

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Getting started – what’s next?

Posted on April 23, 2013 by robayedavies

We will switch databases, to a set of data on item attributes. And we will work on another of the especially attractive and powerful features of R: the capacity to select and work with specific elements of a larger database: … Continue reading →

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Getting started – a quick word on destinations – plotting

Posted on April 22, 2013 by robayedavies

A critical reason for learning to use R is the superior capacity that affords to visualize data. If you learn to plot data with R you are learning to plot data using the best tools now available. There are four … Continue reading →

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Plot your data

Posted on April 14, 2013 by robayedavies

I would start plotting my data almost from the beginning. You can get an impression of how powerful the visualization capacity of R is from this gallery. There are multiple systems for doing graphics in R (cf. in SPSS where you … Continue reading →

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What they call workflow

Posted on April 10, 2013 by robayedavies

[Password protected version of this post, under resources, with downloadable example files] Many researchers talk about workflow. This refers to the series of steps involved in completing an investigation: going from intention to paper, to paraphrase the title of Levelt’s … Continue reading →

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