I wrote this short piece for Massive Science:
Psychology is the science of the human mind and behavior. It evolved from the other sciences, like biology, physics, and sociology. Along the way, it has developed into one of the more socially relevant sciences, with its findings applying to government, business, relationships, sports, and many other topics. But a key challenge for the field is that the mind is less tangible than organisms, matter, or even people themselves. The field also has a replication crisis on its hands, in addition to the skepticism that many people already hold towards the notion of studying the mind scientifically.
But does psychology even have functional theory — a set of cumulative explanations for why something is the way it is?