Language is endlessly variable. Each of us can come up with an infinite number of sentences in our native language, and we're able to do so from an early age— almost as soon as we start to communicate in sentences. How is this possible?...

Behaviourism is one of the most important concepts in human and animal psychology. Behaviourists believe it's the most robust form of psychology as it relies on emperical evidence.

Before we dive into all the particulars of modern psychology and its research methods, we need to get a little context. When was psychology first developed, and by whom? Was it scientific at that time, or more philosophical? Who was the...