Nick Item-Writing Academy
About 45 minutes · Academy module: Distractor Engineering.
The unit of discrimination is the near-miss: the option that is one step away from correct. If the key is "hold the digoxin and notify the provider," the near-miss is "administer the digoxin and recheck the potassium in 4 hours" — right drug, right lab, wrong action. If the key is hypokalemia, the near-miss is hyperkalemia, not hypernatremia. Near-misses come from the same clinical family as the key; they force the examinee to actually know the content rather than merely recognize the topic.
Write distractors toward the key, not away from it. The instinct is to make wrong answers obviously wrong so nobody can argue with the key. Resist it — an item whose distractors are obviously wrong has no measurement power.
The richest distractor source is the real errors real learners make. Keep a running list: the signs students confuse (hypo- vs. hyperglycemia), the precautions they mix up (droplet vs. airborne), the interventions they mistime (when to hold a beta-blocker before surgery), the values they misremember (therapeutic digoxin range). Each misconception is a pre-built distractor with known pull.
Our read: faculty often write distractors from the textbook's correct content with one word changed. Misconception-based distractors perform better because they mirror how examinees actually go wrong — which is exactly what a distractor is supposed to capture.
Every option should be the same kind of thing at the same level of specificity. If the key is a nursing action, all distractors should be nursing actions — not one action, one assessment finding, and one documentation note. If the key names a specific medication, distractors should name specific medications, not "the prescribed diuretic."
This is the homogeneity rule, and it has a second benefit: when every option belongs to the key's family, two-correct accidents surface early. If two options in the same family are both defensible, you have discovered the ambiguity before administration, while it is still cheap to fix.
After an item is administered, the distractor pull tells you which options did work. An option nobody chose is a passenger — replace it with a near-miss. An option that pulled high-performing examinees is a red flag for a second defensible key or a subtle flaw in the stem. The item-analysis module teaches the full reading; the engineering takeaway is simple: distractors are hypotheses, and administration data is the experiment that tests them.
(intended key: A)
Stem: A client taking furosemide reports muscle weakness and leg cramps. The nurse reviews the morning laboratory results and notes a potassium level of 2.9 mEq/L. Which electrolyte imbalance does this client most likely have?
A. Hypokalemia B. Hypernatremia C. Hypercalcemia D. Hypermagnesemia
implausible distractors — none belong to the key's family.
The stem describes the classic hypokalemia picture, and every distractor is a hyper- state of a different electrolyte — none is an answer a knowledgeable examinee would seriously consider. The item measures recognition of the word "hypokalemia," not clinical reasoning. The rewrite keeps one near-miss (hyperkalemia — the genuinely confusable opposite), adds a plausible same-family distractor (hyponatremia, which shares vague weakness symptoms), and keeps one clearly-wrong-but-plausible option so the item still has range.
— cold-solve verified: 2/2 (solvers chose A, A)
Stem: A client taking furosemide reports muscle weakness and leg cramps. The nurse reviews the morning laboratory results and notes a potassium level of 2.9 mEq/L. Which electrolyte imbalance does this client most likely have?
A. Hypokalemia B. Hyperkalemia C. Hyponatremia D. Hypocalcemia
Key: A
Furosemide wastes potassium; 2.9 mEq/L is below the 3.5 mEq/L threshold with matching symptoms. Hyperkalemia is the true near-miss (the confusable opposite), hyponatremia shares nonspecific weakness, and hypocalcemia is plausible but unsupported by the diuretic context. Both independent cold solvers selected A and named no other defensible option.
Recording it adds the module to your Academy completion record on this device — module, track, level, and date, ready to download from your account page for faculty-development documentation.