kirkegaard: GG_group_means(), easy plotting of group means using ggplot2
Do you find yourself in need of making nice ggplot2 plots for group means over and over again? Are you tired of (re-)writing big chunks of code for something that…
Transracial adoption meta-analysis: Van Ijzendoorn et al (2005)
Van Ijzendoorn, M. H., Juffer, F., & Poelhuis, C. W. K. (2005). Adoption and cognitive development: a meta-analytic comparison of adopted and nonadopted children's IQ and school performance. Psychological bulletin,…
kirkegaard: df_func()
Often I want to get the mean value for a case across a number of columns, usually years. This however gets repetitive because the base mean() function cannot handle data…
Transracial adoption study: Odenstad et al (2008)
I found this one a long time ago and tweeted it, but apparently forgot to blog it. Odenstad, A., Hjern, A., Lindblad, F., Rasmussen, F., Vinnerljung, B., & Dalen, M.…
kirkegaard: df_add_delta()
One idea for a series of blog posts is that I could about new functions in my R package. Often I just push these without letting anyone know, but I…
Occupations, cognitive ability and stereotypes
It seems that no one has integrated this literature yet. I will take a quick stab at it here. It could be expanded into a proper paper later in case…
Another political bias test
See also: Rationality and bias test results I stumbled upon another political bias test: http://econturingtest.com/ Basically, you will be given 10 questions: 5 about why US-style conservatives favor/oppose a given…
Cognitive ability and tattoos and piercings
https://staffanspersonalityblog.wordpress.com/2013/11/05/openness-to-experience-that-liberal-je-ne-sais-quoi/ Tattoos and piercing. I haven’t found any evidence that this relates to intelligence or even creativity. On the other hand, what underlying factor of openness would it be an…
Genomic autocorrelation of quantitative traits
https://twitter.com/KirkegaardEmil/status/662840970166280192 See first: Some methods for measuring and correcting for spatial autocorrelation Piffer's method Piffer's method to examine the between group heritability of cognitive ability and height uses polygenic scores…
Review: Quantitative Research in Linguistics: An Introduction
https://www.goodreads.com/book/show/19823567-quantitative-research-in-linguistics http://gen.lib.rus.ec/book/index.php?md5=3bb68f8bfea90338ad2efa04569108e2 There are few good things to say about this book. The best thing is on the very first page: Some things never change: the sun rises in the…
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