How to answer matrix and grid questions
Written and reviewed by Dana Whitfield, RN, MSN · 5 min read · Updated September 2026
Short answer
A matrix item is a table: findings down the side, and columns asking you to classify each one — expected or unexpected, indicated or contraindicated, effective or ineffective. Every row is scored on its own, so it is really several small questions wearing one uniform, and the way to fail is to read the rows as a group.
One row at a time
Each row is judged independently, which means there is no pattern to find and no quota of ticks per column. Candidates who notice they have marked four things 'unexpected' in a row and start second-guessing are inventing a constraint the item does not have.
Cover the other rows if it helps. Ask the column question about this finding, for this client, and move on.
The column heading is the whole question
'Indicated', 'contraindicated', 'expected', 'unexpected', 'effective', 'ineffective' — these are not interchangeable and the difference decides the answer. A finding can be entirely expected for the condition and still require action; an intervention can be indicated and still not yet effective.
Re-read the heading before each row until it is automatic. More marks are lost here to misreading the column than to not knowing the clinical content.
Partial credit, and why blanks are indefensible
Matrix items carry partial credit per row, commonly with a plus/minus scheme where a wrong tick can cancel a right one within the same row group. That is a reason to think, not a reason to leave gaps — an unanswered row scores nothing at all.
Work every row, at a steady pace. These items are among the most answerable on the exam once the format stops being a surprise, because the clinical judgement in each individual row is usually straightforward.
Whatever you take from this, the next step is the same: answer questions and read the rationales. Our reduction of risk potential practice questions are the closest set to what this guide covers, there are ten more on the practice questions hub, and the pricing page spells out what the free tier includes.
One question from the reduction of risk potential set
Four hours after a cardiac catheterization via the right femoral artery, the nurse notes the client's right dorsalis pedis pulse is now faint and the foot is cool and pale. What is the nurse's priority action?
Rationale
A pulse that was present and is now faint, with a cool, pale extremity distal to the puncture site, is arterial occlusion until proven otherwise — a limb-threatening complication that needs the provider now. Documenting and rechecking wastes the window, warming treats the symptom and masks the change, and asking the client to move the ankle neither restores flow nor gives you new information.
Answer: C
Common questions
Is each row of a matrix question scored separately?
Yes. Rows are independent, with partial credit across the item. There is no expected distribution of answers between the columns.
What is the difference between 'expected' and 'indicated'?
Expected asks whether a finding is normal for this condition. Indicated asks whether an action is appropriate for this client now. A finding can be expected and still need acting on.
Should I leave a matrix row blank if I am unsure?
No. A blank row scores zero. Some schemes let a wrong answer cancel a right one within a group, but a considered answer still beats a guaranteed nothing.