https://en.m.wikipedia.org/wiki/Ivan_Pavlov https://en.m.wikipedia.org/wiki/Ivan_Pavlov Pavlov famously rang a bell while feeding his dog, eventually demonstra

https://en.m.wikipedia.org/wiki/Ivan_Pavlov https://en.m.wikipedia.org/wiki/Ivan_Pavlov Pavlov famously rang a bell while feeding his dog, eventually demonstrating that the dog would salivate at the sound of the bell alone, showing an adaptive link between stimuli and subconscious response.