PSNI Deductive
Reasoning Practice
The first test in a PSNI student officer campaign is an 18 minute deductive reasoning test on schedules, rooms, rankings and calendars. Practise on 30 original source items (49 questions) with a placement grid and worked answers, untimed or in an 18-minute adaptive-style test. Then read how the real test works from the PSNI's own pages (checked 23 October 2026).
Independent information, not advice · Sources checked 23 October 2026 · Northern Ireland unless stated
It is the timed part of the PSNI's Initial Selection Test: SHL's Verify Interactive deductive reasoning test, 18 minutes as standard, computer adaptive and interactive, built around 12 pieces of source material on themes like team schedules, rooms and rankings. You sit it once per campaign, alongside an untimed Global Skills Assessment. The two scores are combined against a pass mark. Practise by drawing a grid, placing the fixed facts first and following each chain of rules.
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Every puzzle on this page is written by PolicePay in the style of the themes the PSNI lists. None is taken or adapted from PSNI, Deloitte or SHL material. The PSNI's own assessment pages warn that its test content is protected. The real test is deliberately not set in a policing context, so neither are our puzzles. The real test is adaptive and interactive: you drag, place and order items on screen while the questions get harder or easier as you go. Use this for the reasoning and SHL's free practice for the interface.
Practice
One puzzle at a time, untimed
Pick a theme and level, place the items in the grid, answer the questions and read how each answer is worked out. 30 source items: 10 easier, 10 standard and 10 harder.
Timed test
12 source items in 18 minutes
Adaptive in style: get every question on an item right and the next one is harder; slip up and it is easier. You cannot go back. Have pen and paper ready.
Original PolicePay puzzles in the style of the published themes (team schedule, team rooms, rankings, team calendar, task scheduling). Not PSNI, Deloitte or SHL questions. The real test is interactive and adaptive in ways a practice bank cannot copy exactly and it may ask more than one thing about each piece of source material. Practice scores do not predict a pass.
These 30 source items are free. The PSNI Assessment Centre Pack has 156 more, so every timed test is fresh, plus role plays and written exercises with AI feedback for the Assessment Centre: £24.99 for 12 months, one payment.
See what is in the packWhat the PSNI Initial Selection Test is
The Initial Selection Test (IST) is the first assessment in a PSNI student officer campaign, run online by Deloitte for the PSNI on SHL's platform. You get a unique link by email after applying. For the October 2026 campaign the PSNI says to plan to complete the IST in December. Here is how the PSNI describes it:
| What | Detail | |
|---|---|---|
| Part 1 | Verify Interactive: Deductive Reasoning | 18 minutes as standard (may differ with adjustments); computer adaptive; interactive; built around 12 pieces of source material |
| Part 2 | Global Skills Assessment (GSA) | Not timed; forced choice; mapped to the College of Policing's Competency and Values Framework; not set in a policing context |
| Platform | SHL Talent Central | A unique link by email; a PC or laptop is recommended; tablets and smartphones are allowed if they meet SHL's specifications |
| Attempts | One per campaign | Rescheduling only in very exceptional circumstances, such as a bereavement; no exemptions for earlier passes |
| Scoring | Combined score against a pass mark | You must attempt both parts; the PSNI does not publish the pass mark |
It is not the National Sift used by forces in England and Wales, which pairs a situational judgement test with a behavioural styles questionnaire. If you are applying to both, you need different practice for each: our SJT practice is for the National Sift, not the IST.
How the deductive reasoning test works
The PSNI's IST page says the deductive reasoning part measures problem solving and reasoning skills. Three features shape how you should prepare:
- It is timed. 18 minutes as standard for 12 pieces of source material. That is about 90 seconds a piece, including reading time (our arithmetic). The PSNI does not say how many questions each piece carries.
- It is interactive. Questions come in written or visual form and you answer by interacting with the screen: placing items in a schedule, ordering them or selecting options. Our placement grid imitates the placing; SHL's own practice shows you the real interface.
- It is adaptive. Get one right and the next is harder; make a mistake and the next is a bit easier. So everyone feels the test getting harder. Nobody should expect to find all of it easy.
The PSNI lists possible themes: team schedules, team rooms, rankings or schedule exercises, team calendars and scheduling tasks. It says other themes are possible. Our 30 free source items cover all five named themes.
The five puzzle themes (and how to attack each)
| Type | Puzzles here | What it looks like | Fastest approach |
|---|---|---|---|
| Team schedule | 6 | Who works or leads something on which day. Often two lists at once (person and task). | Draw a grid: days down the side, lists across. Fill fixed facts first. |
| Team rooms | 6 | Rooms along a corridor or floors in a building, often with next-to rules. | Sketch the layout. Next-to and not-next-to rules cut options fast. |
| Rankings | 6 | A sequence: 1st to 5th by score, sales or votes. | Write places 1 to n in a row and place the anchored items, then the chains. |
| Team calendar | 6 | Sessions or meetings in time slots across a day or week, with people leading each. | Write the time slots in order; the next session means the next slot, even across lunch. |
| Tasks: scheduling | 6 | Jobs done one at a time as steps 1 to n, with who does which. | Number the steps; dependency facts (comes straight after) fix pairs first. |
Schedules and calendars
You are told who works or attends when, partly. Some facts fix a person to a day ("Iqbal is on Wednesday"); others link two people ("Jones is the day after Fox"); others rule things out ("Fox is not on Monday or Friday"). Two-list schedules add a second set (tasks, sessions, topics) where "leads" or "is responsible for" facts tie a person to an item.
Orderings and rankings
A single line of people or items. The key words are "before", "after", "immediately", "two places after" and "exactly one between". Chains such as "Bea is above Cy but below Dot" collapse quickly into a fixed order once you write them as Dot then Bea then Cy.
Rooms
Rooms, parking bays, floors or cars in a row. "Next to" means one apart; "not next to" removes the neighbours of a fixed item. With a fixed item in the middle, two other items that must be together often have only one place left.
Either-or and if-then facts
Harder items mix in conditions ("Either Priya plays the ghost or the narrator is next to the villain"; "If Quinn goes, Shah goes"). Use them last, once the fixed facts have narrowed things down. Remember the reverse direction: "If A then B" also means "if not B, then not A". "A only if B" means "if A, then B", not the other way round. These questions usually ask what must be true, so an option that only could be true is wrong.
A method that works for every puzzle
- Read the question first. You may not need the whole arrangement. "Who is on Tuesday?" can sometimes be answered with half the grid.
- Draw the slots. Days, places or rooms across the top of your paper. For two lists, a small grid.
- Place the fixed facts. "Clarke speaks third", "Burke works Wednesday". These never move.
- Apply the tight links. "Immediately after", "the day before", "two places after" and "next to" have few possible positions once something is fixed.
- Test the two or three cases left. If a pair can go in only two places, try each. One will break a fact.
- Use the "not" facts last. They decide between the final cases.
- Check your answer against every fact. Ten seconds of checking saves a wrong answer in an adaptive test.
Write each person or item as a letter with a tick or a cross. Start from the certain fact, then follow every rule it triggers. If two rules point opposite ways, you have misread an "only if". Then test each option: it must be true in every case the rules allow, not just one.
Worked example: the stand-up rota
A short schedule puzzle, solved step by step.
Five people in a design studio each lead the morning stand-up on one day from Monday to Friday: Fox, Grant, Hughes, Iqbal and Jones.
- Grant leads the stand-up on an earlier day than Hughes.
- Iqbal leads on Wednesday.
- Fox does not lead on Monday or Friday.
- Jones leads the day after Fox.
Who leads the stand-up on Tuesday?
- Fixed fact: Iqbal is Wednesday. Grid: Mon _, Tue _, Wed Iqbal, Thu _, Fri _.
- Narrow Fox: not Monday, not Friday, not Wednesday (taken). So Fox is Tuesday or Thursday.
- Tight link: Jones is the day after Fox. Fox on Tuesday would put Jones on Wednesday, which is Iqbal's. So Fox is Thursday and Jones Friday.
- What is left: Grant and Hughes for Monday and Tuesday. Grant is earlier, so Grant Monday, Hughes Tuesday.
- Answer: Hughes. Check: every fact holds.
That took four short steps and one case test. This habit suits the schedule and ranking themes the PSNI lists: fixed facts, tight links, then the last cases.
Timing strategy for 18 minutes
- About 90 seconds a piece. 18 minutes over 12 pieces of source material (our arithmetic). Some will take 40 seconds, some two minutes.
- Do not get stuck. The PSNI's FAQs say to work quickly but accurately and not to spend too long on any one question.
- Finish the test. The FAQs also say you must complete the entire deductive reasoning test to avoid a score reduction. Leaving the end unfinished costs you.
- Read the marking instructions. The platform explains any negative marking before you start. Follow what it says on the day.
- Expect it to feel hard. In an adaptive test, getting answers right makes the next question harder. A tough question can be a good sign.
Our timed test gives you 12 source items in 18 minutes, adaptive in style and forward only. The real test has 12 pieces of source material and may ask more than one thing about each, so treat our pace as a rough guide. If you finish with time to spare, use it to check; if you run out, practise the method untimed until it is automatic.
The other half: the Global Skills Assessment
The second part of the IST is the Global Skills Assessment. The PSNI says it is not timed, uses a forced choice format, is mapped to the College of Policing's Competency and Values Framework but is not set in a policing environment. It asks you to answer based on your own circumstances. No work experience is needed. The PSNI says practice questions for it are neither possible nor necessary.
You must attempt both parts to be considered. The scores are combined against a pass mark. So a strong reasoning score is not enough on its own. Answering the GSA honestly matters too. Read our Global Skills Assessment guide and, for the values behind it, the CVF explained.
Rules on taking the test
- One attempt per campaign. There is a strict deadline. The PSNI recommends attempting the IST early in the testing phase.
- Technical problems. Report any unresolved issue to Deloitte before the deadline; issues reported afterwards cannot be considered. Do not contact SHL unless Deloitte tells you to.
- Devices. A PC or laptop is recommended; tablets and smartphones can be used if they meet SHL's specifications.
- Do not log out and back in repeatedly. The PSNI's briefing prohibits it. Discussing the IST publicly is also prohibited.
- No exemptions. Taking the IST in an earlier campaign does not exempt you.
- Do it yourself. You may be asked to re-sit the IST at the assessment centre to verify your score.
- Rescheduling. Only in very exceptional circumstances, raised before or during the testing phase.
After the IST
If you pass, you upload evidence of your education and right to work (expected late January 2027 for this campaign), then attend an in-person assessment centre in and around Belfast with written exercises and role plays (spring to summer 2027, to be confirmed). Candidates who pass go onto a merit list. Every stage is in our how to join the PSNI guide. The assessment centre exercises are covered in our PSNI Assessment Centre guide.
A two-week practice plan
| When | What | Why |
|---|---|---|
| Days 1 to 3 | Untimed mode, five or six puzzles a day. Read every explanation, even when you were right. | Learn the grid and chain methods. |
| Days 4 to 6 | SHL's own interactive deductive reasoning practice (linked from the PSNI's IST page). | Get used to the real interface: dragging and placing, not ticking. |
| Days 7 to 9 | One timed paper here each day. Note which puzzle types slow you down. | Aim for about 90 seconds a puzzle. |
| Days 10 to 12 | Untimed practice on your slowest type only. | Speed comes from method, not rushing. |
| Days 13 to 14 | One last timed paper, then rest. Check your device, connection and link. | Sit the real test early in the window. |
SHL's practice is the closest thing to the real interface; the PSNI's IST page links to it (choose the mobile-enabled, interactive deductive reasoning practice). The PSNI also says familiarisation material is available inside the platform just before you start.
Common mistakes
- Reading "only if" backwards. "Taylor goes only if Reid goes" means Taylor needs Reid. It does not mean Reid needs Taylor.
- Treating "after" as "immediately after". "Grant is earlier than Hughes" allows any gap.
- Forgetting "in either order". "Next to" works both ways unless a fact says which side.
- Choosing what could be true. "Must be true" questions need an option that holds in every arrangement.
- Solving in your head. A ten-second sketch beats re-reading the facts four times.
- Leaving the test unfinished. The PSNI says an incomplete reasoning test leads to a score reduction.
What we could not verify
- The pass mark and how the deductive reasoning and GSA scores are weighted. The PSNI does not publish either.
- The exact negative marking rules, which the PSNI says are explained inside the platform.
- How many questions you see in total. The PSNI gives 12 pieces of source material; each may carry more than one task.
- Exact IST dates for the October 2026 campaign beyond "December".
Frequently Asked Questions
What is the PSNI deductive reasoning test?
It is one of the two parts of the PSNI's Initial Selection Test (IST): SHL's Verify Interactive deductive reasoning test. The PSNI says it is timed (18 minutes as standard), interactive and computer adaptive, built around 12 pieces of source material. It tests problem solving and reasoning, with themes such as team schedules, team rooms, rankings and scheduling tasks.
How long is the PSNI IST?
The deductive reasoning part is 18 minutes as standard; the time may differ if you have agreed reasonable adjustments. The other part, the Global Skills Assessment, is not timed.
Is the PSNI deductive reasoning test adaptive?
Yes. The PSNI says it uses computer adaptive testing: the next question gets harder after a correct answer and easier after a mistake. That is why a raw score on any fixed practice set, including ours, cannot tell you whether you would pass.
Is there negative marking in the PSNI IST?
The PSNI's FAQs say the platform gives instructions on any negative marking. They also say you must complete the whole deductive reasoning test to avoid a score reduction. They advise working quickly but accurately without spending too long on any one question.
How many attempts do you get at the PSNI IST?
One per campaign. Rescheduling is allowed only in very exceptional circumstances, such as a bereavement. Passing in an earlier campaign does not exempt you. You may be asked to re-sit the test at the Assessment Centre to verify your score.
Are these the real PSNI test questions?
No. All 30 source items here are original PolicePay practice puzzles in the style of the themes the PSNI lists. They are not PSNI, Deloitte or SHL questions. The real test is interactive (you place and move items on screen) and adaptive, which a practice bank can only imitate. The PSNI points candidates to SHL's own practice test for the interface.
When do I sit the IST for the October 2026 campaign?
The PSNI says to plan to complete the IST in December. The October 2026 campaign closes for applications at 3pm on 30 November 2026. Exact testing dates come from the recruitment team by email.
Can I use a pen and paper in the PSNI deductive reasoning test?
Yes. The PSNI's IST introduction page suggests having a pen or pencil and some paper available for the deductive reasoning test. Sketching a grid is the quickest way to solve schedule and ranking puzzles.
Do I need police knowledge for the IST?
No. The FAQs say neither part needs prior knowledge of police duties and the PSNI says both parts are deliberately not set in a policing (or similar) environment. Our puzzles are set in offices, studios, clubs and shops for the same reason.
Sources and how we checked them
Every factual claim on this page was written from the sources below, read on 23 October 2026. Rules and figures change, so check the source for the date you are reading this. Where we could not confirm something from an official or independent source, the page says so rather than guessing. Spotted something out of date? See our corrections policy.
- Join PSNI: Initial Selection Test introduction : Verify Interactive deductive reasoning: 18 minutes standard, computer adaptive, interactive, 12 pieces of source material, possible themes, pen and paper; GSA untimed, forced choice, CVF-mapped; SHL practice; plan to sit in December (read 21 October 2026) (accessed 23 October 2026)
- Join PSNI: Help and FAQs : attempt both parts; instructions on negative marking in the platform; complete the whole deductive reasoning test to avoid a score reduction; strict deadline; devices; re-test at assessment centre; no exemptions; practice not mandatory (read 21 October 2026) (accessed 23 October 2026)
- Join PSNI: Police officer recruitment home page : October 2026 campaign open, applications close at 3pm on 30 November 2026 (accessed 23 October 2026)
- Join PSNI: How do I join? : the stages after the IST: evidence uploader, assessment centre, merit list (accessed 23 October 2026)
- Join PSNI: Current campaign timeline : IST in December 2026; evidence uploader late January 2027; assessment centres spring to summer 2027 (all to be confirmed) (accessed 23 October 2026)
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Disclaimer
PolicePay.co.uk is an independent guide. It is not affiliated with the Police Service of Northern Ireland, Deloitte, SHL, the Northern Ireland Policing Board or the Department of Justice. It does not recruit, test or assess applicants. Our practice material is original PolicePay work, not PSNI, Deloitte or SHL material: the PSNI says its selection process is a bespoke design delivered by and copyright to Deloitte and that unofficial tutors are not endorsed. The PSNI sets and changes its own process, so check joinpsni.co.uk and your candidate emails before relying on anything here. Details are as checked on 23 October 2026.