In my profession we call this personal story the 'formulation', driven by good practice guidelines underpinned by psychological theory and evidence.

One thinks of macroeconomic models that fail to predict anything and psychological theories that fail to replicate.

Techniques and models from cognitive psychology are widely applied and form the mainstay of psychological theories in many areas of both research and applied psychology.

Psychological theories about attachment were suggested from the late nineteenth century onward.

Psychological theories based on knowledge about the human brain were fashionable in the late 19th century.