I'm specifically looking for a word that means "leads into more research or further examination".
I was thinking that the word heuristic could mean this, but I'm not sure.
Does anyone know a word a phrase for this?
Here's the way we might use such a word in a sentence:
He read a biography about Thomas Edison and he learned about how inventors think which became a [heuristic] which motivated him to do more research about creativity.
Or, in such a way that it would replace the following kind of an idea:
When you learn to develop video games you have to learn how to draw on the screen which leads you to learn how geometric shapes are mathematical entities which will lead you to learn the math of geometry.