Are there psychologic or sociologic theories (like those studied in Industrial and organizational psychology) that could explain the effectiveness, or lack of it, of Agile / Scrum methodologies?
I am aware of experimental work on the topic, like that by Elizabeth Whitworth. However, I am not interested in empirical studies about the effectiveness of using Agile / Scrum. I am interested in theoretical justifications for why we would expect Agile/Scrum to be effective or ineffective based on what we know about social and io-psychology. Are there existing psychological or sociological theories that explain the effectiveness or ineffectiveness of Agile/Scrum?
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