Milburn report on social mobility http://tinyurl.com/nhyo76g : 'IQ tests harm disadvantaged applicant groups'. Hmmm...pic.twitter.com/0WpDM8PPt6
@AndrewSabisky @timothycbates @Rosalind_Arden_ Maybe I should do a visualization of test bias.
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@KirkegaardEmil@AndrewSabisky@Rosalind_Arden_ Useful: Show no bias if slope is accurate? e.g. male's scoring higher on an autism screen -
@timothycbates It's more complicated. Maybe re-read Jensen 1980 chapter 9? :) http://emilkirkegaard.dk/en/wp-content/uploads/Bias-in-Mental-Testing-Arthur-R.-Jensen.pdf …@AndrewSabisky@Rosalind_Arden_ -
@KirkegaardEmil@AndrewSabisky@Rosalind_Arden_ Indeed, & misunderstood. But different means/common slopes examples help understanding -
@timothycbates One can do multiple at once: slope, intercept, reliability, validity. Maybe email me what exactly you have in mind. -
@KirkegaardEmil something like this? Slider on means & covariances, + have the text change to describe?pic.twitter.com/0ZZQTmex4a
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@timothycbates That is an example of intercept bias, actually. :P Same predictor value does not imply same outcome values for the groups. -
@timothycbates This is what unbiased prediction looks like with different means.pic.twitter.com/wzWOkAWdfL
End of conversation
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