The theory of evolution by natural selection was first formulated in Darwin’s book “On the Origin of Species” in 1859. It describes how organisms change over time as a result of changes in heritable ...

Operant conditioning is a theory that explains how behaviors are influenced by their consequences or results. It’s often used today to help people adopt new behaviors or change old habits. If you’ve ...

Ask most conservationists to talk about their impact, and you’ll hear stories of forests protected, of species saved, or of new technologies making a difference. But if you take a step back from those ...

Webb C.A., DeRubeis R.J., Amsterdam J.D., Shelton R.C., Hollon S.D. Mechanisms of change in cognitive therapy for depression: therapist adherence, symptom change and the mediating role of patient ...