Renaming functions in R packages using roxygen2

Naming things in programming is hard. I can see 2 reasons for this. 1) It is hard to pick a name you won’t want to change later. With large projects, where things are not designed in detail before beginning to write the code, I often find that the names I gave things initially were not…

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Ending cognitive aging

Consider the findings from the large UK study I recently blogged (Akarlin blogs it too): Some of these have steep declines. It’s not just an artifact of the FLynn effect, age really has a strong negative effect on cognitive abilities. Consider the rates of dementia and age: https://www.ncbi.nlm.nih.gov/pubmed/10891908 So, by age ≥85 some close to…

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A sex difference that won’t go away and measurement invariance

Whitley, E., Deary, I. J., Ritchie, S. J., Batty, G. D., Kumari, M., & Benzeval, M. (2016). Variations in cognitive abilities across the life course: Cross-sectional evidence from Understanding Society: The UK Household Longitudinal Study.Intelligence, 59, 39–50. https://doi.org/10.1016/j.intell.2016.07.001 Background Populations worldwide are aging. Cognitive decline is an important precursor of dementia, illness and death and,…

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Immigrant performance in the Netherlands: brief look

I have only been able to find one fairly detailed dataset of immigrant performance in the Netherlands (covered in this study). It found the usual things, but with much uncertainty because the numbers were old (fewer immigrants back then → sampling error), covered a single year only (sampling error) and there was only one kind…

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