THE CENTRAL IDEA
MDP asks about reported reasoning routines; it does not test IQ, numeracy, rationality, or decision-making competence directly.
Concept and evidence
Decision research uses many methods, including behavioral tasks, forecasts, experiments, and self-reports. Work on adult decision-making competence uses tasks with defined performance criteria, while research on intuitive expertise examines conditions under which experience can support judgment. MDP is a different kind of proposal: an inventory of reported practices for framing, appraising evidence, considering alternatives, expressing uncertainty, mapping consequences, and reviewing decisions. It is not a substitute for a performance test.
Someone can endorse careful routines and still misunderstand the evidence. Another person may make a sound decision quickly because the task is familiar and feedback has been informative. A questionnaire about process cannot determine which situation applies. The report should therefore avoid language suggesting that the participant is objectively rational, intelligent, unbiased, or an expert decision maker. It can help them identify a routine worth examining.
Applied interpretation and an original worked example
A participant reports regularly comparing alternatives. In one decision, however, the alternatives may all rest on the same mistaken assumption. Another participant reports fewer explicit comparisons because they handle a stable task with a well-established rule. The second person is not necessarily a worse decision maker. The important questions concern the task, the quality of knowledge, and the fit of the process.
An MDP exercise starts with a recent low-stakes decision and reconstructs the question, information, options, uncertainty, consequences, and review. The participant identifies one step that would have been useful to make more explicit. This may be a short note rather than a complex analysis. The exercise is a structured reflection, not a diagnostic test of reasoning. A high profile should never be used to justify greater authority in consequential decisions without independent evidence. The instrument’s development status means that even its narrower self-report interpretations remain proposals to be tested.
Keeping a reasoning routine separate from its result
A person can follow a careful process and reach an incorrect conclusion because essential information is missing. Another can reach a correct conclusion through a weak process and good fortune. MDP asks about reported routines, so neither a favorable outcome nor a polished account of reasoning can establish what the questionnaire measures. Consider someone choosing a venue using an incomplete access description. They may compare alternatives conscientiously while overlooking a requirement that was absent from the material. The error concerns both the information environment and the decision process; it cannot be translated directly into a general ability judgment.
A research design could independently vary the quality of information and the opportunity to inspect it. Reviewers would examine what the participant does with the information actually available, while separately recording whether the final choice meets the stated requirements. This would let researchers challenge an overly broad interpretation of the inventory. If MDP relates to describing a process but not to using it when an opportunity exists, its claims should narrow accordingly. If task performance depends mainly on prior domain knowledge, the study should retain that explanation rather than calling the score intelligence. The report must not turn endorsement of reasoning habits into an estimate of IQ, expertise, or immunity to error.
Points to carry forward
- Keep a description of process separate from a demonstration of ability.
- This original framework remains in development; cited research does not validate its questions.
Where the evidence stops
MDP cannot establish cognitive ability, competence, or future decision quality.
No established reliability, norms, predictive validity, or professional endorsement is claimed.
The cited literature informs our original framework. Read the current evidence status and intended use alongside this guide.
REFERENCES / FOLLOW THE ORIGINAL EVIDENCE