chil.rice.edu/research/pdf/G…
eac.gov/documents/2017…
mprnews.org/story/2008/12/…
You can do this experiment at home. Try it.
forbes.com/sites/marcoann…
pdfs.semanticscholar.org/3540/87a106974…
and books.google.com/books/about/An…
Uniform execution of written procedures not a strong point (ref. 2007 Georgia Tech study)
washingtonpost.com/news/powerpost…