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Originally Posted by SalesGuy
Jacques, to my knowledge, the "AIDA" model dates back to the late 1800's. 
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That may be so.
The first written mention of AIDA that I could find was in a 1934 testbook titled (I think) "Fundamentals of Professional Selling" by John Russell et al, the latter being five other college professors. However, it wasn't until the car maker study in the late 1940s that it was scientifically verified and amended to "AIDCA." That's when it took off.
I first learned AIDCA it in 1953 when I majored in Industrial Sales for my first college degree.