Ascertainment bias

ascertainment_bias_ncbi.nlm.nih.govCatalogue of Biases Collaboration
Spencer EA, Brassey J,
Ascertainment bias.
In: Catalogue Of Bias 2017:
https://catalogofbias.org/biases/ascertainment-bias

example:
“Specific learning disorder is more common in males than in females (ratios range from about 2:1 to 3:1) and cannot be attributed to factors such as ascertainment bias”
DSM-5, 2013. p. 73

image from:
https://www.ncbi.nlm.nih.gov/books/NBK9792

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