Assertion: hawthorn's effect | /r/AtLocation | the 1950s
Facets:
value: during his analysis of experiments
type: TEMPORAL
value: by researcher henry a. landsberger
type: OTHER
Source sentences:
text: The effect was first described in the 1950s by researcher Henry A. Landsberger during his analysis of experiments conducted during the 1920s and 1930s.