What is the difference between program theory and implementation theory?

• A. Implementation theory explains why the program exists; program theory explains how it is delivered.
• B. Program theory explains how the program should work; implementation theory explains how it is actually delivered.
• C. Program theory focuses on outcomes; implementation theory focuses on inputs.
• D. Both theories are identical.

Answer: (B)

The difference being tested is between how a program is meant to work in theory and how it is actually carried out in practice. Program theory describes the planned causal pathway: the logic, assumptions, and sequence that show how activities are supposed to produce outputs and, in turn, outcomes. It answers how the program should work if everything goes as intended. Implementation theory, on the other hand, focuses on the delivery in the real world: how the program is actually implemented, including whether activities are delivered as planned (fidelity), how much exposure participants receive (dose), who is reached, and how context and adaptations influence execution. So the best answer says that program theory explains how the program should work, while implementation theory explains how it is actually delivered. For example, a mentoring program might be designed with a theory that regular mentoring reduces dropout by boosting engagement; the implementation theory would examine whether mentors meet weekly, for how long, with what quality, and whether schools adapt sessions, which can affect whether the intended outcomes occur.