Getting Through Selection: Tests and Assessment Centres
If you've applied for a role, or are about to, the stages that follow decide whether you get it. Between sending an application and getting an offer there are usually several stages, and some happen before you meet anyone: online tests, a recorded video interview, then perhaps a live interview or an assessment centre. Each stage is testing something specific, and once you know what, you can prepare for it rather than guess. In this module you'll map your target employer's selection process, practise online tests with a method and a timer, predict interview questions with Andrew Hirst's Skills vs Questions grid, plan how to show each competency at an assessment centre, and decide whether to ask for a reasonable adjustment. Everything goes into your own Selection Readiness Checklist.
Choose your route. Start with Lesson 4.1 to map your employer's stages; it takes little time and tells you what to prepare. Then go to the stage you face next. Online tests: Lesson 4.2. A video or live interview: Lesson 4.3. An assessment centre invitation: Lesson 4.4, then Lesson 4.3 for its interview.
Selection Readiness Checklist
Every selection stage, from online tests to the assessment centre day, as a checklist that shows your progress and a prioritised list of what to prepare next.
4.1The Selection Journey: What Each Stage Is Testing
A selection process is the set of stages an employer uses to decide between applicants, from application to offer. The common stages are an application form or CV, online tests, a recorded video interview, a live interview (by phone, video or in person), an assessment centre and then an offer. Not every employer uses all of them: a small organisation may go straight from an application to one interview, while a large graduate recruiter may use every stage. Some stages, such as online tests, often come before any person reads your application in detail.
Each stage is testing something different. The application checks that you meet the essential criteria. Online tests measure reasoning and judgement across many applicants quickly. A recorded video interview shows how you communicate and gives first evidence of the competencies. A live interview goes deeper into your evidence and your motivation. An assessment centre watches what you actually do across several exercises. Knowing this tells you what to prepare: there is no point rehearsing a STAR story for a numerical test, or cramming facts for a group exercise.
Behind most stages sits a list of competencies: the skills and behaviours the role needs, written down so that assessors can score evidence of them. They usually come straight from the job advert's essential criteria, which you matched to the eight employability components in Module 1. Assessors typically have a score sheet with each competency, a rating scale and space to note the evidence they saw. Two things follow. First, you are scored on evidence, not on charm or confidence alone. Second, the same competency is usually tested at more than one stage, so one weak moment rarely decides the outcome.
To find out an employer's process, read its careers site (many have a "how we recruit" page), the advert and any information sent with an invitation; ask people you've met through networking; and ask the recruiter if anything is unclear. Look too for the employer's rules on AI and outside help. In the Institute of Student Employers' 2025 survey, 46% of employers had no problem with candidates using AI at some stages, mostly for CVs, cover letters and application questions, while undisclosed AI use in interviews was the misconduct employers reported most often. Rules differ and change: follow the employer's own guidance, and where there is none, treat tests and interviews as your own work. Module 2 covers scoring software and your rights.
The same thinking works inside an organisation. Many employers use interviews, tests and even internal assessment centres for promotion, so someone in work seeking a step up maps the stages in exactly the same way.
4.2Online Tests: Reasoning, Judgement and Questionnaires
Online tests fall into two families. Ability tests have right answers and a time limit: numerical reasoning (reading tables and charts and working out answers), verbal reasoning (deciding whether statements follow from a passage), and diagrammatic or logical reasoning (spotting the rule in a sequence of shapes). Preference measures, such as personality and work-style questionnaires, have no right answers, only honest ones: they ask how you usually behave, and employers use them to see how you might fit a role. Both are psychometric tests: standardised, and scored against a comparison group of people who have taken them before.
A situational judgement test (SJT) sits between the two. It describes a workplace scenario, such as a colleague missing a deadline or an unhappy customer, and asks you to choose, rank or rate possible responses. Your answers are compared with what the employer considers effective, so the best preparation is to read the employer's values and the role description, and to answer as a sensible new starter in that role would. Read each question's instructions closely: some ask for the most and least effective response, others for a ranking. Some employers also use game-based assessments, short games that measure things like attention or how you handle risk. You can't revise for them, but knowing the format helps you stay calm.
Ability tests reward practice, and the reason is not that you become cleverer: you become familiar with the format, faster at the routine steps and calmer under the clock. Free practice tests are available from test publishers and university careers services. Do them timed, in a quiet space with a reliable connection, as you would on the day. Then the part most people skip: review every mistake and note why it happened, whether misreading the question, a slip in the arithmetic or running out of time.
For numerical questions, use four steps. Read the question first, so you know exactly what is being asked (a percentage or an absolute figure? which year?). Find the rows and columns you need and ignore the rest of the table. Estimate the answer roughly, which often rules out options straight away. Only then calculate, and check your answer against the estimate. Use a calculator if the test allows one.
Finally, the rules. Many employers say tests must be your own work, with no help from other people or AI tools, and some use time limits and question banks to make outside help pointless. Using help also defeats the purpose: if a test gets you through to a stage you're not ready for, you'll meet the same skills again in person.
4.3Video and Live Interviews: Predicting the Questions
In a recorded video interview, questions appear on screen and you record answers within set limits, for the employer to watch later. Formats vary: expect preparation time, a maximum answer time, and sometimes a practice question or a retake. Look into the camera, not your own image; keep notes minimal; test your camera, sound, light and background a day or two before. A live interview, by video or in person, adds follow-up questions and a chance to build rapport.
What the interview is for. Andrew Hirst's Interviews Tutorial starts from one idea: an interview is selection, not deselection. The interviewer hopes you're the person they need. They want a human conversation and a feel for you; to "kick the tyres" and check that your CV is real; to ask about specific tasks and behaviours; to test your understanding; and to explain the job. Your stories, told with STAR or PAR, are the tool for almost every question.
The obvious questions. Always prepare these: Why this job? Why you? What do you know about us? What do you bring to the team? What training do you feel you need? How does it fit with your studies or your career so far? And "Can you give me a time when…", about each competency. Andrew's Skills vs Questions grid goes further: common questions down one side, such as "Tell me about you" and "Describe a complex problem you solved", and the employability components across the top. Tick the components each question tests and name the STAR story that answers it. The grid shows which stories carry most weight and which components have no story yet.
Behind every question sit Andrew's three questions every interviewer wants answered but never asks: will you do the job (motivation), can you do the job (evidence) and will you fit in. Use your Career Planning Canvas's purpose for "Why us?". Body language and voice matter too, but don't believe that they are most of the message: that claim misreads the psychologist Albert Mehrabian's 1960s experiments on judging feelings from single words, not interviews. Your evidence is what gets scored.
Your questions for them. Andrew's guide How to get a grad job… Quick! (2018) advises preparing about three, from four kinds: the interviewer's own experience; how to succeed in the role; the team and your development; the organisation and where people progress. Sam prepares "What's your favourite part of working here?", "If I joined, what would you most want me to focus on in my first few months?" and "Where have people who started in this role moved on to?"
Practise by recording yourself, then score it against one competency: is the evidence there, told in "I"?
4.4The Assessment Centre: Showing Competencies on the Day
An assessment centre is a half-day or day of several exercises, each observed and scored against the role's competencies. It may be in person or online. Typical exercises are a group exercise (a few candidates discuss a problem and reach a decision), a written or in-tray exercise (working through emails, documents or a short report under time), a case study, a presentation and one or more interviews. Informal moments, such as lunch, may happen too: be friendly and professional, without worrying that every word is scored.
The group exercise is where people most often prepare the wrong thing. Assessors are not counting who talks most; they note behaviours against the competencies. Behaviours that score well: listening and then building on someone else's idea; summarising the brief so the group starts together; suggesting a timekeeper or keeping an eye on the clock yourself; using the information in the pack; bringing a quieter member in ("What do you think?"); and helping the group reach a decision in time. Dominating, interrupting or ignoring the brief scores badly. Other candidates are not your rivals: several of you can do well.
The written task tests organisation and written communication under time. Read the task first, decide what matters most, plan briefly and leave a few minutes to check. Practise once against the clock, such as replying to an email or ranking a list of tasks. The presentation is usually short and often set in advance, though sometimes on the day; it is taught in depth in Module 5.
Reasonable adjustments. Under the Equality Act 2010, employers must make reasonable adjustments in recruitment for disabled candidates, so that you aren't put at a substantial disadvantage. Disability here means a physical or mental condition that has a substantial, long-term effect on your day-to-day activities; it can include mental health conditions and specific learning difficulties such as dyslexia. Examples in Acas guidance include giving more time for a written test, making sure the interview room is accessible for a wheelchair user and providing a sign language interpreter; the Equality and Human Rights Commission's guidance gives more. An employer only has to make adjustments if it knows, or could reasonably be expected to know, that a candidate is disabled and likely to be put at a disadvantage, so ask: ideally when you're invited to a stage, saying what the barrier is and what would help. Employers should use the information only to arrange the adjustment. This is general guidance, not legal advice; other countries have their own rules.
Afterwards, offer or not, note what each stage tested and what went well, and ask for feedback if it's offered. That reflection is your preparation for the next one.
Sam Prepares for Northgate Foods' Selection Process
Sam Patel applies to be a graduate marketing assistant at Northgate Foods (fictional). The process: online application; online numerical reasoning and situational judgement tests; a recorded video interview (three questions; 30 seconds to prepare, up to two minutes to answer); an assessment centre at head office (a 30-minute group exercise, a five-minute presentation, a competency interview). Ellie Morgan (see Module 3) mentioned the presentation. Sam enters each stage in the Selection Readiness Checklist, with Northgate's four competencies.
(a) A practice numerical question. Practice data, not Northgate's. Units sold (thousands) by region, Q1 → Q2: North 40 → 46; South 25 → 30; West 35 → 35. Which region had the largest percentage increase?
- Read the question: percentage, not units.
- Find the rows: Q1 and Q2 for each region.
- Estimate: North +6 on 40; South +5 on 25, about a fifth; West none.
- Calculate: North 6 ÷ 40 = 15%; South 5 ÷ 25 = 20%; West 0%.
Answer: South, 20%; North's bigger unit rise is the trap.
(b) One video answer. "Give an example of working in a team: what was your contribution?" Sam's Skills vs Questions grid shows it tests teamwork and self-management. Sam's two-minute answer uses the charity project story:
- Situation: "In my final year, five of us did a consultancy project for a local charity."
- Task: "We missed our first deadline, and the charity needed our report in time for its trustees' meeting."
- Action: "I set up a shared task list so everyone could see who owned each section, and started a weekly 15-minute check-in to spot problems early. When one section fell behind, I paired its writer with a teammate who had finished."
- Result: "We delivered the report on time, and the charity used two of our recommendations."
Most of it is Action, in "I": check-ins for self-management, pairing for teamwork.
(c) The group-exercise plan. Four candidates have 30 minutes to choose which of three products to launch first. Sam plans one behaviour per competency:
| Competency | What Sam will do |
|---|---|
| Written communication | Note the group's decision and reasons in a few clear lines |
| Organisation | Summarise the brief; suggest a timekeeper; help the group decide in time |
| Confidence with data | Use the pack's data to compare options |
| Teamwork | Bring in a quieter candidate |
Knowledge Check
A friend says there's no point practising online reasoning tests because they measure a fixed ability. What would you tell them?
Tests are standardised, but your score also depends on knowing the format, working at the right pace and avoiding careless slips, and timed practice followed by reviewing your mistakes improves all three, so practice helps you show the ability you already have.Practice data: Product A's sales rose from 50 to 60 units and Product B's from 20 to 26. Which had the larger percentage increase, and which step of the four-step method stops you choosing the wrong one?
Product B: A rose 10 ÷ 50 = 20% and B rose 6 ÷ 20 = 30%; reading the question first (percentage, not the bigger rise in units) stops you picking A just because its rise of 10 is larger.In Module 1 you built STAR stories. A recorded video interview gives you up to two minutes per answer. How should you use those two minutes, and why?
Keep the Situation and Task to a sentence or two each, spend at least half the time on the Action told in "I", because the assessor is scoring what you did rather than what the group did, and finish with the Result and what you learned so the answer ends before the time runs out.Why map likely questions to the employability components with the Skills vs Questions grid, rather than prepare a separate answer for every possible question?
The grid shows which components each question tests, so you can see which few STAR stories cover many questions and which components have no story yet, and choose the right angle on a small bank of stories instead of memorising dozens of answers.In a group exercise, one candidate talks the most and the group picks their idea; another says less but summarises the brief, keeps an eye on the time and asks a quiet candidate for a view. Who is likely to score better, and why?
Probably the second, because assessors score observed behaviours against the competencies (each summary, timecheck and invitation to speak is evidence of organisation, communication or teamwork), while talking the most fills no boxes on its own and dominating can count against you.You have dyslexia that slows your reading, and you've been invited to a timed online test. When and how should you ask for a reasonable adjustment, and why does the timing matter?
Ask as soon as you're invited, before the test, saying what the barrier is and what would help, such as extra time, because an employer only has to make adjustments if it knows, or could reasonably be expected to know, that you are disabled and likely to be put at a disadvantage, and it needs time to arrange them.
Resources & Further Practice
- Online tests explained: Prospects' guide to psychometric tests (prospects.ac.uk/careers-advice/interview-tips/psychometric-tests) describes numerical, verbal and situational judgement tests and the instructions to read carefully; free practice tests are offered by test publishers and most university careers services.
- Recorded and live video interviews: Prospects' video interview tips (prospects.ac.uk/careers-advice/interview-tips/video-interview-tips) and the National Careers Service's "Video interview tips" (nationalcareers.service.gov.uk/careers-advice/how-to-do-well-in-video-interviews) cover set-up, camera position and practice runs.
- What happens at an assessment centre: Prospects' assessment centres guide (prospects.ac.uk/careers-advice/interview-tips/assessment-centres) lists the usual exercises, from group discussions and in-tray exercises to presentations and interviews.
- Your rights to adjustments: the Equality and Human Rights Commission's Equality Act 2010 guidance for workers on applying for a job (equalityhumanrights.com) explains reasonable adjustments for interviews and tests; Acas's page on interviewing job applicants (acas.org.uk/recruitment/interviewing-job-applicants) gives examples from the employer's side. These are general guidance, not legal advice.
- How employers are using AI in selection: the Institute of Student Employers' article "How are employers using AI in early careers recruitment?" (ise.org.uk, November 2025) summarises its 2025 survey, including employers' rules on candidates' AI use; look for a newer edition before you quote a figure.
- Your careers service: many university and college careers services offer practice tests, recorded mock interviews and mock assessment centres, and some still help recent graduates; check what yours offers.
- Further practice: in the Selection Readiness Checklist, set every item's status honestly, then work through the "Fix first" list, starting with the high-priority items for the stage you'll meet next.
Your Selection Readiness Checklist
- What I prepared: my Selection Readiness Checklist for my target role, my practice log of two timed tests, and my grid of six likely questions with a STAR story for each.
- What I learned: what each stage of my target employer's process really tests, and which stage I had been preparing for in the wrong way.
- What I'll do next: the stage I'll practise next and the date I'll do it, added as a dated action to the FIT section of my Career Planning Canvas.
Did this module make sense?
Thanks for saying so: the Faculty sees every “not really”.
Which part lost you? (optional, anonymous)
Thanks: that tells the Faculty exactly where to look.
In the meantime:
Another way in
Two beliefs often get in the way. The first is that tests measure a fixed ability you can't prepare for. Tests are standardised, but your score also depends on knowing the format, working at the right pace and not making careless slips, and all of those improve with practice. The second is that the group exercise rewards whoever talks most. It doesn't, and seeing why makes the whole day easier.
Imagine the assessor with a pen and a score sheet. Down the side are a few competencies, say teamwork, organisation and confidence with data. Next to each is a box headed "evidence seen". The assessor ticks a box only when they see you do something: you summarise the brief (organisation), ask a quiet candidate for a view (teamwork), point to a figure in the pack (confidence with data). Talking for five minutes without doing any of those fills no boxes. Your job is to give the assessor something to write down for each competency.
The same small-steps idea works for a numerical question. Take: a team sold 20 boxes in May and 25 in June; what was the percentage increase? Step one, read the question: it wants a percentage. Step two, find the numbers: 20 and 25. Step three, estimate: 5 more on 20 is a quarter. Step four, calculate: 5 ÷ 20 = 0.25, so 25%. Four small steps, and no step is hard.
Key terms in this module
- Selection process
- The stages an employer uses to decide between applicants, from application to offer.
- Psychometric test
- A standardised test of an ability (such as numerical or verbal reasoning) or a preference (such as a personality questionnaire), scored against a comparison group.
- Numerical reasoning test
- A timed test of how well you interpret data in tables and charts and work out answers from it.
- Situational judgement test (SJT)
- A test that describes workplace scenarios and asks which responses you would choose, compared with what the employer considers effective.
- Recorded video interview
- An interview in which questions appear on screen and you record your answers within set time limits, for the employer to watch later.
- Assessment centre
- A half-day or day of several exercises (often a group exercise, a presentation and interviews), each observed and scored against the role's competencies.
- Competency
- A skill or behaviour the role needs, written down so that assessors can score evidence of it.
- Reasonable adjustment
- A change to the recruitment process (such as extra time on a test) that an employer must make, where reasonable, so that a disabled candidate is not put at a substantial disadvantage.
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