Using a study of programmers in the 1970s (where not punching the wrong hole in punch cards was a critical skill) for programmers in 2017 may not give you the most useful data.
Is there any study that shows that adding distractions to people and removing personal privacy makes them more productive and/or lowers stress hormones?
For example:
>...In 2011, the organizational psychologist Matthew Davis reviewed more than a hundred studies about office environments. He found that, though open offices often fostered a symbolic sense of organizational mission, making employees feel like part of a more laid-back, innovative enterprise, they were damaging to the workers’ attention spans, productivity, creative thinking, and satisfaction.
Makes you wonder why more companies don't measure these things. Google and Facebook A/B test button colors, but can't be bothered to measure programmer productivity in any scientific way.
Of course writing out programs by hand is also a long obsolete and useless skill — except for interviews at all the top companies, where it's vital.