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The curious case of the missing workplace teaspoons
https://phys.org/news/2018-11-curious-case-workplace-teaspoons.html
The answer was a resounding yes: spoons in research institute tearooms seem to have legs. While good fun, the research is a good example of a study design referred to as "longitudinal".
A longitudinal study uses continuous or repeated measures to follow particular individuals – in this case, teaspoons – over prolonged periods of time.