V. Designing Effective Constructed Response Items
B. Avoiding Ambiguity
Ambiguity in assessment items refers to questions that lack clarity and can be interpreted in multiple ways. This can be caused by vague terms, double-barreled questions, or assumptions of prior knowledge. For advanced learners, questions should be both deep and broad in their subject matter, but still maintain clarity to avoid introducing uncertainty.
BASIC Information
Ambiguity in assessment items refers to a lack of clarity or certainty in a question that can lead to multiple interpretations. For accurate assessment, questions should be crafted to convey a single, unambiguous meaning.
In the medical field, accurate interpretation is paramount. When assessing a PA student's knowledge or clinical reasoning, questions must be unambiguous to ensure that students are not penalized for misunderstandings stemming from the question itself.
INTERMEDIATE Information
Vague Terms: Words like "frequent," "several," or "many" are subjective and can mean different things to different people.
Double-Barreled Questions: Questions that inquire about two topics simultaneously but expect one unified response can be misleading.
Assuming Prior Knowledge: If a question assumes students know a piece of information not explicitly provided or taught, it can lead to confusion.
Be Explicit: Whenever possible, provide concrete details instead of relying on vague terms.
Break Down Complex Queries: Instead of one complicated question, break it down into multiple, more straightforward questions.
Pilot Testing: Before finalizing any test or assessment, have it reviewed by peers or even test it on a small group to identify potential ambiguities.
In a cardiology module, instead of asking: "Discuss the issues related to heart medications," a more specific and unambiguous question would be: "Explain the potential drug-drug interactions when prescribing ACE inhibitors alongside diuretics in patients with congestive heart failure."
ADVANCED Information
For advanced learners, especially in specialized fields like medicine, questions should delve deep into the subject matter without being ambiguous. It's a challenging balance to maintain, ensuring that the depth of a question doesn't introduce uncertainty.
Contextualize with Clinical Scenarios: By grounding a question in a real-world scenario, it becomes more straightforward and related to the student's practical knowledge.
Use Directives: Employing words like "compare," "contrast," "analyze," or "evaluate" can guide the student toward the expected type of answer.
Specify the Format: If a specific format or structure for the answer is expected (like a list, a short paragraph, or a chart), mention it in the question.
When assessing a student's advanced understanding of pulmonary conditions, rather than asking: "Discuss lung conditions related to smoking," an in-depth yet clear question would be: "Compare and contrast the pathophysiology, clinical presentation, and diagnostic findings of emphysema and chronic bronchitis, two primary components of Chronic Obstructive Pulmonary Disease (COPD), in long-term smokers."