I want to know the answer to the following question:
Before he began studying economics, what concept did Hayek come up with that was later featured in his 1952 book?
All the background I'm provided with is that "In The Sensory Order: An Inquiry into the Foundations of Theoretical Psychology (1952), Hayek independently developed a "Hebbian learning" model of learning and memory – an idea which he first conceived in 1920, prior to his study of economics.". Is that enough to answer the question?