A hypothesis gives an assessment a question. It should help you decide what information to gather and how that information could change your reasoning. It becomes a problem when it turns into a conclusion that every later observation is forced to support.
For students, the aim is not to invent a longer list of tests. It is to make the relationship between the person's difficulty, your tentative explanations and your next assessment step visible. The case below teaches that relationship without providing a patient-specific diagnostic or treatment protocol.
Begin with the actual difficulty
Ontario's Assessment, Diagnosis, Treatment Standard connects appropriate assessment, professional judgement, patient goals and practice within competence. Its Evidence-Informed Practice Standard also calls for integration of credible evidence with the person's context and professional judgement. Those principles support a focused assessment question; they do not validate a particular mnemonic or test sequence. Ontario Assessment Standard, Ontario Evidence-Informed Practice Standard.
Write the difficulty in the person's terms before translating it into a clinical explanation. “Cannot manage the trip from the bus stop to work comfortably” is a task description. “Has poor endurance” is already an interpretation. You may investigate endurance, but the case has not established it simply by describing a difficult journey.
Worked case: one task, several possible explanations
Fictional learning case. In a simulated interview, Rowan says the walk from the bus stop is difficult. The learner immediately writes, “Reduced endurance; assess walking capacity.” Further conversation reveals that Rowan manages a similar distance elsewhere, but the route to work includes a steep section and carrying a heavy bag. Rowan is also worried about arriving late after the bus schedule changed.
The first hypothesis may still be relevant, but it is incomplete. The new details point to task demands and context as well as physical capacity. A useful assessment should explore how these factors relate to the difficulty rather than decide that one must explain everything.
An original comparison table makes the competing explanations more precise:
| Tentative explanation | Finding that would make it more relevant | What that finding would leave unresolved |
|---|---|---|
| A broader limitation in walking capacity contributes | Similar difficulty across genuinely comparable walking situations | The reason for the limitation, its safety implications and the appropriate assessment |
| Added task demands contribute | Difficulty tracks the steep section or carried load | Whether slope, load, pace or another difference explains the pattern |
| The altered journey schedule contributes | Difficulty is especially associated with rushing to arrive on time | Whether pace, physical demands, worry or several factors contribute |
The rows can overlap. They are questions for assessment, not diagnoses or mutually exclusive answers. Observations across different routes are not controlled experiments: pace, surface, rest and other conditions may differ. A report that one walk is easier cannot isolate a cause. A question earns its place by helping decide what to investigate next.
Predict how an answer would change your plan
Consider the question, “Is the same difficulty present on a level route without the bag?” If the answer is yes, your interpretation may differ from a situation where the difficulty occurs only on the steep work route. Neither answer establishes a diagnosis. Each changes what needs further investigation.
Now compare a question about Rowan's favourite sport. It might become relevant, but you need to explain why. If you cannot connect it to the current assessment purpose, it may be background information rather than the next priority.
This is the heart of the method: before asking a question or selecting a measure, say what different possible findings would mean for your reasoning. If every answer leads to the same conclusion, examine whether the question is truly testing your hypothesis.
Look deliberately for information that does not fit
Suppose the learner remains convinced that reduced endurance explains the case. They repeatedly highlight the difficult walk but ignore the similar distance Rowan manages elsewhere. That is a useful moment for self-review.
The conflicting detail does not prove endurance is normal. It does show that the first explanation needs refinement. Ask what differs between the situations and whether the original hypothesis predicts that difference.
In your practice notes, create a line called “What would make me reconsider?” This is an original learning prompt, not an official examination scoring criterion. Its purpose is to keep your reasoning open to information that challenges the first impression.
A good answer can retain a hypothesis while lowering confidence in it. You do not have to swing from certainty to the opposite certainty whenever one new detail appears.
Choose assessment procedures within a wider safety process
Hypothesis-led questioning does not replace appropriate screening, consent, safety judgement or the need to address concerning findings. Nor does a neat reasoning table authorize a student to perform an assessment independently.
For an actual clinical procedure, you need to understand what it measures, how it is performed, its limitations and whether it is appropriate for the person and setting. The fictional case does not supply enough information to prescribe a specific test battery or exertional task.
That boundary is part of good reasoning. It is more useful to say “I would need to establish whether this assessment is appropriate before selecting it” than to supply a familiar test name solely because the question asks what to do next.
Connect findings to a conditional conclusion
After gathering information, avoid ending with a list of results. Explain how the results affect your working account of the problem. For Rowan, a learning conclusion might say: “The difficulty appears sensitive to route demands and load, so these need to be considered alongside physical capacity. The current information does not isolate one cause.”
This statement does three jobs: synthesizes the case, limits the conclusion and points toward further assessment. It does not pretend that uncertainty makes the assessment useless.
Also distinguish the person's goal from your explanation. Rowan may prioritize arriving at work comfortably and on time. Your assessment can investigate the factors relevant to that goal without assuming the desired solution must be a particular exercise or a larger test score.
Practice and feedback
Write two questions for the case. Beside each, describe two plausible answers and how they would alter your next step. Then identify one question that would add information but would not change your immediate reasoning.
A strong response might compare task conditions, the person's experience and the onset or pattern of the difficulty while preserving appropriate safety assessment. A weak response selects ten familiar tests without explaining what uncertainty each addresses.
Finally, change one fact: Rowan now describes the difficulty in every comparable walking situation. Revisit the hypothesis table rather than merely adding that fact to the old conclusion. Which explanations become more or less plausible, and what would you need to clarify next?
Use the exercise with an authorized classroom case and discuss unresolved clinical questions with a qualified supervisor. The useful output is a clearer link between evidence and decision, not a claim that the worksheet proves diagnostic competence.
Sources and further reading
- College of Physiotherapists of Ontario: Assessment, Diagnosis, Treatment Standard — Assessment selection, interpretation within competence, practical plans and referral.
- College of Physiotherapists of Ontario: Evidence-Informed Practice Standard — Integration of credible evidence, professional judgement and patient context.