Definition
Assessments used by an instructor before or early in training to identify a learner's existing knowledge, skills, strengths, and weaknesses, so instruction can be targeted to what the learner actually needs.
Plain English
A check the instructor does to find out what you already know and where your gaps are, before deciding what to teach next.
Context Anchor
Seen in instructor training, lesson planning, and discussions of how an instructor evaluates a student’s progress.
Derivation
From the Greek 'diagnosis,' meaning 'to distinguish or discern.' A diagnostic assessment is about discerning where the learner stands, much like a doctor diagnosing a patient before prescribing treatment.
Why Pilots Care
Identifying gaps early lets training focus on real needs, which shortens the learning path and reduces the chance of later confusion or errors in flight.
Intuition Check
Diagnostic does not mean a medical diagnosis or aircraft troubleshooting here. In this context, it means finding the specific learning need behind a student’s performance.
Example Sentence 1
Before starting instrument training, the CFII gave the student a short diagnostic assessment to see how comfortable he was with basic attitude instrument flying.
Example Sentence 2
After the diagnostic assessments showed weak instrument interpretation, the next lessons focused on that area.