Predictors of individual variation in the performance of animals in cognitive tests

This file contains data collected as part of a study that is summarized in the following publication:
"Individual variation in cognitive performance: developmental and evolutionary perspectives", by
Alex Thornton & Dieter Lukas, published in Philosopohical Transactions of the Royal Society B 367: 2773-2783 (2012 http://rstb.royalsocietypublishing.org/content/367/1603/2773.short
The study was a meta-analysis investigating the factors that influence the performance of animals in cognitive testing. There are five separate datasets, all of which report data extracted from earlier publications. The file contains (i) data that formed the basis for the results presented in the paper, (ii) all data collected as part of the study, including entries with missing or unclear information that were removed before analyses, (iii) data that was collected during a preliminary study, where the variables differ from those in the final dataset, but some studies might appear in both, (iv) and (v) additional data from studies that, while listing individual performance, did not link this to further detail about the individuals.