The story
Coined by Abraham S. Luchins and Edith Hirsch Luchins in 1942 after publishing a study of their water-jar experiment. Einstellung (“mindset”) is a German borrowing, hence the capitalisation.
Etymology from Wiktionary, CC BY-SA 4.0.
Einstellung effect
Today it means: A problem-solving mindset displayed where a simpler solution for solving a particular problem type is not noticed due to thinking being fixed into a particular logic pattern by earlier repetitions of similar solutions. Full definition →