UCAT Decision Making (DM): Timing, Question Types and Marking, 2026 Guide

UCAT Decision Making (DM) is the second of the four subtests in the UCAT (University Clinical Aptitude Test). You get 37 minutes to answer 35 questions, about 63 seconds per question, after a separate 1 minute 30 second instruction section. It tests whether you can apply logic to reach a conclusion, judge the strength of an argument and work with statistical information, and it is scored from 300 to 900.

How long is UCAT Decision Making and how many questions are there?

UCAT Decision Making has 35 questions in 37 minutes, plus a 1 minute 30 second instruction section before the clock starts. That is about 63 seconds per question, the most time per question of the three cognitive subtests (Verbal Reasoning gives you 30 seconds and Quantitative Reasoning about 43).

Decision Making changed in 2025. When the UCAT Consortium removed Abstract Reasoning, Decision Making gained six questions and six minutes, going from 29 questions in 31 minutes to 35 in 37. The 2025 technical report explains that 31 of the 35 are scored and four are unscored pretest items being trialled for future tests. You cannot tell which is which, so treat every question as if it counts. More on what changed in the 2025 UCAT, and the timings for every section in our UCAT timings guide.

What is UCAT Decision Making out of, and how is it marked?

Decision Making is reported as a scaled score out of 900 (the range is 300 to 900), and it adds to Verbal Reasoning and Quantitative Reasoning to make your cognitive total out of 2700. Behind the scaled score, the two question formats carry different raw marks.

The UCAT Consortium states only that 1 mark is awarded to partially correct responses on the multiple-statement questions. It does not publish what counts as partly correct; the common reading is four of the five statements right. Two-mark questions make up roughly a third of the scored items: across the 2025 test forms, 55 of the 155 scored Decision Making items were drag-and-drop.

There is no negative marking, so answer every statement of every question. For how raw marks become a scaled score, see UCAT scores and scoring, or put your marks into the UCAT score calculator, which has a Decision Making mode for partial marks.

What are the six UCAT Decision Making question types?

The six types are logical puzzles, syllogisms, interpreting information, recognising assumptions, Venn diagrams and probabilistic reasoning. Syllogisms and interpreting information use the five-statement Yes/No format; the other four are single-answer questions.

The UCAT Consortium does not publish how many of each type appear, and the mix varies between test forms. Its 2025 technical report did rank them: interpreting information items were harder than syllogisms, logical puzzles were the hardest single-answer type that year, and Venn diagrams were the easiest.

What does UCAT Decision Making test, and why do medical schools use it?

In the UCAT Consortium's words, doctors and dentists are often required to make decisions in situations that may be complex. Decision Making checks whether you can reach a sound conclusion from the information in front of you, weigh competing arguments and handle numbers and probability under time pressure. You do not need to know any formal logic or mathematical terminology to answer the questions.

Decision Making counts equally with Verbal Reasoning and Quantitative Reasoning in your cognitive total. Most universities use that total, and a few have set subtest minimums, so a weak Decision Making score can still cost you. See how universities use the UCAT for each school's approach.

How do you answer each Decision Making question type?

Use one repeatable method per type, so no question feels new on the day. Each type below has a method, the trap that costs most marks and a worked example; the linked guides go deeper.

UCAT Decision Making: Logical Puzzles

Logical puzzles give you a set of constraints, such as who sits where or what happens in which order, and ask which one option must be true. They are pure deductive reasoning questions.

The game plan is straightforward: externalise the problem onto your noteboard. Students who try to hold all the conditions in their heads make errors. Students who write even a rough sketch or list of assignments solve these reliably.

Common trap: reading every condition in order and then judging all four options from memory. Work from what is definitely true, cross out any option that breaks a single condition, and stop as soon as one option remains.

Worked Example 1: Logical Puzzle

Four medical students, Aisha, Ben, Conor, and Demi, are assigned to clinical placements in Cardiology, Dermatology, Psychiatry, and Surgery. Each student attends exactly one placement.

• Aisha does not attend Cardiology or Surgery.
• Ben attends either Dermatology or Psychiatry.
• Conor does not attend Psychiatry.
• Demi attends Surgery.

Which of the following must be true?

• A. Aisha attends Dermatology.
• B. Ben attends Psychiatry.
• C. Conor attends Cardiology.
• D. Aisha attends Psychiatry.

Working it out:

Start with what is certain. Demi = Surgery (stated directly). Aisha cannot be Cardiology or Surgery, so Aisha is in Dermatology or Psychiatry. Ben is restricted to Dermatology or Psychiatry. Conor cannot be Psychiatry, so Conor is in Cardiology or Dermatology.

Now test both possible arrangements:

• Scenario 1: Aisha = Dermatology. Ben must then be Psychiatry (his only remaining valid option). Conor = Cardiology. Valid.
• Scenario 2: Aisha = Psychiatry. Ben must then be Dermatology (Psychiatry is taken). Conor = Cardiology. Also valid.

Options A and D are each possible but neither is certain. Option B is only true in scenario 1. Option C holds in both scenarios without exception. Conor always ends up in Cardiology regardless of where Aisha goes.

Answer: C

Go further with logical puzzles basics and logical puzzle tasks and deductions.

UCAT Decision Making: Syllogisms

Syllogisms present a set of premises and ask you to evaluate five conclusions as Yes (definitely follows) or No (does not definitely follow). These are the Yes/No format questions worth up to 2 marks each.

The single most important rule: Yes means the conclusion is logically certain given the premises alone. If a conclusion is merely possible or likely, the answer is No. Most student errors in syllogisms come from confusing "could be true" with "must be true."

Keywords to treat with precision:

• "All X are Y" means every single X belongs to Y. No exceptions permitted.
• "Some X are Y" means more than one X is a Y, but not all of them. This is the UCAT definition: an undetermined number, more than one but less than all. Everyday speech and formal logic let some include all; the UCAT does not.
• "No X are Y" means zero overlap. Total exclusion.
• "Only X are Y" means Y is a subset of X, not that all X are Y.

A quick sketch on your noteboard, drawing circles for each category and their relationships, will resolve most ambiguity. Draw them inside, outside, or overlapping based on each premise, then check each conclusion visually.

Common trap: Treating "some" as "most." If a premise says "Some doctors are researchers," you cannot conclude that most doctors are researchers. Check the exact logical implication, nothing more.

Questions often use invented or unfamiliar words. Treat them as labels (A, B, C) and work only from what the premises say; what you know about the real things never counts.

For the vocabulary itself, every logical word with the proportion it allows and the trap attached to it, see the Decision Making definitions guide. For premises built on only, unless or a negative, formal logic notation gives you the trigger and result method and the contrapositive.

For more worked sets, see the UCAT syllogisms guide with worked examples.

Worked Example 2: Syllogisms

All pharmacists are healthcare professionals. Some healthcare professionals are researchers. No researchers are administrators. Some pharmacists are clinical educators.

Evaluate each conclusion as Yes or No before reading the answers below.

• A. Some pharmacists are researchers.
• B. No pharmacists are administrators.
• C. All clinical educators are pharmacists.
• D. No administrators are researchers.
• E. At least one clinical educator is a healthcare professional.

Statement by statement:

A. No. All pharmacists are healthcare professionals and some healthcare professionals are researchers, but those researchers could be a different group from the pharmacists. Possible, not certain.

B. No. No researchers are administrators, but nothing says a pharmacist is a researcher, so a pharmacist could still be an administrator.

C. No. Some pharmacists are clinical educators says nothing about clinical educators who are not pharmacists. The relationship does not reverse.

D. Yes. "No researchers are administrators" can always be turned round: if the two groups share no members, no administrator is a researcher.

E. Yes. Some pharmacists (more than one) are clinical educators, and every pharmacist is a healthcare professional, so those clinical educators are healthcare professionals.

Notice what was avoided: "some clinical educators are healthcare professionals" would also claim that not all of them are, which the premises never establish. Read every some, most and all in a conclusion as strictly as in a premise.

UCAT Decision Making: Interpreting Information

These share the syllogism format, five Yes/No statements worth 2 marks, but the information comes as a passage, a table or a chart instead of formal premises.

The rule is identical to the VR mindset: stick strictly to the evidence in front of you. If the data shows a trend across four years, you cannot conclude it will continue into a fifth. If the passage describes an association, you cannot conclude causation.

For data-based versions, read the labels and units before anything else. Confusing absolute numbers with percentages is the quickest way to get several statements wrong in one go and lose both marks.

For passage-based versions, read the question first, then scan the passage for the specific claim being tested. This is more efficient than reading the whole passage before evaluating each statement.

See our dedicated guide on UCAT Verbal Reasoning Inference Questions for more on the inference methodology, which transfers directly to DM interpreting information questions.

Common trap: Answering Yes because a conclusion aligns with common sense. The question is not asking whether the conclusion is reasonable. It is asking whether the provided information definitively supports it.

The full method, with more worked sets, is in the UCAT Decision Making interpreting information guide.

Worked Example 3: Interpreting Information

A study tracked medical students across two cohorts over three years. Cohort A used traditional lectures. Cohort B used a flipped classroom model. End-of-year exam pass rates were as follows:

• Year 1: Cohort A 74%, Cohort B 71%
• Year 2: Cohort A 76%, Cohort B 79%
• Year 3: Cohort A 75%, Cohort B 83%

Evaluate each conclusion before reading the answers below.

• A. Cohort B's pass rate improved each year.
• B. The flipped classroom model causes higher pass rates.
• C. Cohort A's pass rate never exceeded 80%.
• D. By Year 3, more students in Cohort B passed than in Cohort A.
• E. Traditional lectures were less effective than the flipped classroom model by Year 3.

Statement by statement:

A. Yes. 71%, then 79%, then 83%: a rise every year.

B. No. The data shows an association over time, with no control for other variables, so it cannot show cause.

C. Yes. Cohort A's highest figure is 76%, in Year 2.

D. No. These are percentages only. Without the cohort sizes, more students could have passed in Cohort A despite its lower rate.

E. No. Effectiveness is never defined, and one pass-rate figure for two cohorts cannot support a claim about teaching methods in general.

UCAT Decision Making: Recognising Assumptions and Evaluating Arguments

These are single correct answer questions. You are given a proposal or scenario, then asked to select the strongest argument in favour or against it, or to identify an assumption being made.

Strong arguments are directly relevant to the proposal, linked to it by a clear mechanism and grounded in the specific issue. Weak arguments rest on opinion or moral assertion, drift away from the question asked, or depend on assumptions stated nowhere.

If you see emotionally loaded language in an answer option, treat it with suspicion. Opinion masquerading as argument is almost always the distractor here.

Common trap: choosing the option that matches your own view. These questions do not ask what you believe; they ask which argument is logically strongest.

Worked Example 4: Evaluating Arguments

Proposal: All junior doctors should be required to complete a two-week rural placement before specialising.

Which of the following is the strongest argument in favour of this proposal?

• A. Rural areas lack enough specialists, so junior doctors should help fill the gap.
• B. A rural placement would expose junior doctors to a wider variety of undifferentiated presentations, improving diagnostic breadth before specialisation.
• C. It is unfair that rural patients receive lower quality care than urban patients.
• D. Some junior doctors already choose rural placements voluntarily, so a compulsory requirement is unnecessary.

Working through the options:

• Option A makes a workforce argument, but conflates service provision with training benefit. It does not explain how this helps junior doctors develop.
• Option B directly supports the stated aim of improving junior doctors before specialisation. It provides a specific, logical mechanism: broader exposure to undifferentiated presentations. This is the strongest in-favour argument.
• Option C is a social justice assertion. Even if true, it does not logically establish how requiring the placement would fix the disparity.
• Option D argues against the proposal, not for it. It is irrelevant to the question asked.

Answer: B

More examples and the four tests for a strong argument are in the UCAT strongest argument questions guide.

UCAT Decision Making: Venn Diagrams

Venn diagram questions describe how groups overlap, in words, a diagram or a table, and ask which single statement must be true, or which diagram fits the description. They are single-answer questions worth 1 mark.

The key skill is translating language into logical relationships on your noteboard. Draw simple labelled circles: if all A are B, draw A entirely inside B. If some A are B, draw A and B overlapping. If no A are B, draw them completely separate. This takes seconds and removes almost all ambiguity.

Common trap: Treating "All A are B" as meaning the same as "All B are A." The first means A is entirely contained within B. The second means B is entirely contained within A. These are different relationships and require different layouts.

UCAT DM Worked Example 5: Venn Diagrams

A hospital survey found the following about its medical staff:

All surgeons at the hospital are consultants. Some consultants are involved in research. No surgeons are involved in teaching only roles. Some consultants who are involved in research are also involved in teaching only roles.

Which of the following must be true?

• A. All surgeons are involved in research.
• B. No consultants have teaching only roles.
• C. At least one consultant is not a surgeon.
• D. Some surgeons are involved in research.

Working it out: A goes beyond the premises: only some consultants do research. B is contradicted by the last premise. D is possible but not certain, because the research group may contain no surgeons at all. C must be true: some consultants hold teaching only roles, and no surgeon does, so those consultants are not surgeons.

Answer: C

Two-set and three-set diagrams with numbers are covered in the UCAT Venn diagrams guide.

UCAT Decision Making: Probability Questions (Probabilistic Reasoning)

Probability questions in DM use basic arithmetic. You will not need anything beyond GCSE-level probability. The most common formats are:

• Independent events: probability of A and B both occurring = P(A) multiplied by P(B)
• At least one event occurring: 1 minus the probability of none occurring
• Conditional probability: given X has happened, what is the probability of Y?

Use the on-screen calculator freely. Do not attempt multi-step probability calculations mentally under time pressure when the tool is right there.

I keep the full method here short on purpose. The dedicated UCAT probability questions guide has all five rules, the odds conversion, the ten-second rule check, seven worked examples and the traps that cost marks. If probability is where your marks leak, start there.

How long should you spend on each Decision Making question?

Aim for about 63 seconds on average, but spend it unevenly: argument and Venn questions should take well under a minute, which buys time for logical puzzles and the Yes/No sets. Check your pace against the clock at fixed points.

If a logical puzzle takes more than 90 seconds and you have made no progress, flag it and move on. Returning with fresh eyes is faster than grinding through a stale approach.

There is no single right order. One approach is two passes: clear the single-answer questions first in roughly 20 to 22 minutes, then spend the rest on the Yes/No sets, worth up to 2 marks each. Many students prefer the opposite and take the Yes/No sets first, and others skip logical puzzles and come back to them. Try each order in timed practice and keep the one that scores higher.

Never leave a question blank: there is no negative marking. A guess on a single-answer question can still score, and a guess on a Yes/No set can still earn the partial mark. Use the flag button to mark anything you want to revisit, and practise the drag-and-drop answering before the day so it costs you no time.

Pacing across the whole test is covered in UCAT time pressure, and you can practise your timing on our free UCAT Skills Trainer.

What are the most common UCAT Decision Making mistakes?

Importing outside knowledge. The most expensive error in DM. When a premise says "all nurses work night shifts," treat it as true for the purposes of the question, even if you know this is not universally so. Every single conclusion must be traceable back to the given information only.

Confusing possibility with certainty in Yes/No questions. "Could be true" earns a No. Only "definitely follows from the premises" earns a Yes. If there is any logical scenario where the conclusion fails, the answer is No.

Misreading units on data questions. Before evaluating any statement in an interpreting information question, read all labels and units fully. A data set with numbers in thousands that you read as absolutes will produce five wrong answers in a row.

Choosing the argument you agree with, not the strongest one. Argument questions reward logical strength and relevance. The right answer has a direct, traceable link to the proposal, and emotional language in an option is almost always a distractor.

Attempting puzzles entirely in your head. Write things down. Even a rough grid or shorthand list on your noteboard reduces cognitive load and eliminates careless errors. The noteboard is there for exactly this reason.

How do you prepare for UCAT Decision Making?

Start with question type isolation. Before attempting mixed practice, spend a focused session on each of the six types individually. Understanding the game plan for syllogisms is different from understanding it for Venn diagrams. Build each skill separately before combining them.

Then move to timed mixed practice. The real exam presents question types in unpredictable order. Your preparation must include regularly switching mental gears between a probability question and a syllogism without warning. This is a trainable skill, and it transfers directly to how efficiently you reset on test day.

Track your error patterns. If you are consistently losing marks on interpreting information but not on logical puzzles, the answer is not "do more DM practice overall." The answer is "do more interpreting information practice specifically." Targeted revision produces faster gains than diffuse volume.

Start free: learn the rules with our syllogism foundations trainer, then sharpen them with the syllogism micro-drills and syllogism macro-drills. For the other types, use the Venn logic practice questions, data logic practice questions and argument judge practice questions, then bring it together with timed UCAT Decision Making practice questions.

Review every mistake, not only your score: reflective UCAT revision shows you how. Build Decision Making into a UCAT revision timetable alongside the UCAT preparation guide, and read our UCAT Decision Making tips for more strategies.

If you want a tutor to find where your Decision Making marks are going, our 1-to-1 UCAT tutoring is online, and our UCAT courses run live online.

What is a good UCAT Decision Making score?

A Decision Making score of 640 or more put you in the top half in 2026, and 760 or more put you in the top 10%. The 2026 mean was 640, up from 628 in 2025.

These are the UCAT Consortium's final 2026 figures. Universities look at your total, so read this alongside what a good UCAT score is, the full UCAT deciles and, if your score came in low, where to apply with a low UCAT score.