Rob Sutcliff - An expert UI & UX designer from Reading UK explains there is no such thing as rational decision making. 

He brings in examples from various aspects of human psychology and further provides examples on how we make decisions based on our decisions and once the decisions are made we try to provide a rational explanation to the same.

Podcast Reference Course:

https://www.udemy.com/course/master-digital-product-design-ux-research-ui-design/?couponCode=THINKING-PSYCH