Descriptive Language and Injunctive Language

Some models are purely descriptive, and do not tell you what to do. Transactional analysis (TA) was an elaborate description that basically recast Freud's parts model of the id, ego, and superego into contemporary English (child, adult, and parent). However, this description did not provide any methodology or technology for making use of the description. In practice, TA borrowed methods and techniques from other forms of psychotherapy and adapted them to their descriptive framework. Psychiatry's “Diagnostic and Statistical Manual” has over 700 pages describing how people can have problems, but not a word about what to do to resolve them.

In contrast, injunctive language tells you what to do to reach an outcome.

A cookbook is injunctive, because each recipe tells you exactly what to do to get a particular result. A recipe specifies:

  1. an outcome (chocolate cake or a well-done roast)
  2. a list of required ingredients (flour, sugar, chocolate, etc., or a particular cut of meat)
  3. a sequential process for mixing and processing those ingredients and how to cook them to get the desired result.
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