Competency vs Strengths vs Values-Based Interviews: Full Comparison
Preparing for an interview isn’t just about practising answers—it’s about understanding the type of interview you’ll face. Many UK employers use different assessment methods depending on the role, industry, and organisation. This is why understanding the difference between a competency vs strengths interview is essential before interview day.
While competency, strengths-based, and values-based interviews all assess your suitability for a role, they measure different qualities. Some focus on your past experience, others assess your natural strengths, while some evaluate whether your behaviours align with an organisation’s values. Knowing which format you’re facing helps you prepare more relevant examples and answer questions with greater confidence.
How Interviewers Assess Different Interview Types
Regardless of the interview format, employers want evidence that you’re capable of succeeding in the role. Although the questions vary, assessors generally evaluate candidates using the same core principles.
At Job Interviewology, these principles are explained through The Interview Evaluation Model, which focuses on three areas that influence interview performance.
Assessment Area | What Interviewers Assess |
Communication | Are your answers clear, structured and easy to follow? |
Credibility | Do your examples provide genuine evidence and measurable outcomes? |
Perception | Do you demonstrate confidence, professionalism and the right attitude? |
For example, a competency interview may require detailed workplace examples, while a strengths interview explores what motivates you. Despite these differences, interviewers still assess how effectively you communicate and whether your answers provide credible evidence. Understanding The Interview Evaluation Model helps candidates prepare answers that are easier for interviewers to evaluate and score consistently.
What Is a Competency Interview?
A competency interview assesses how you’ve demonstrated specific skills in previous situations. Employers believe that past behaviour is one of the best indicators of future performance, so they ask candidates to provide real examples from work, education, or volunteering.
Most competency interviews are based on a competency framework UK, which identifies the behaviours needed for success in a particular role. Common competencies include teamwork, leadership, communication, problem-solving, customer service, adaptability, and time management.
Typical questions include:
- Tell me about a time you solved a difficult problem.
- Describe a situation where you worked under pressure.
- Give an example of successful teamwork.
Interviewers usually expect structured answers supported by evidence, making the STAR method one of the most effective ways to respond.
What Is a Strengths-Based Interview?
A strengths-based interview focuses on what you naturally enjoy doing and where you’re most likely to perform at your best. Instead of concentrating on lengthy examples, interviewers assess your enthusiasm, motivation, and instinctive behaviours.
Unlike competency interviews, strengths interviews often involve shorter, faster-paced questions designed to capture your genuine reactions.
Common strengths interview examples include:
- What type of work motivates you most?
- Which tasks do you enjoy the most?
- What do colleagues usually rely on you for?
- What achievement has given you the greatest satisfaction?
Employers use these questions to identify whether your natural strengths match the requirements of the role. Honest, enthusiastic answers generally create a stronger impression than rehearsed responses.
What Is a Values-Based Interview?
A values based interview UK assesses whether your attitudes, behaviours, and decision-making align with an organisation’s culture. This interview format is widely used across the NHS, public sector organisations, charities, and employers that place a strong emphasis on workplace values.
A well-known example is the NHS values interview, where candidates are assessed against principles such as compassion, respect, teamwork, inclusion, and commitment to high-quality care. Instead of focusing solely on technical ability, interviewers want evidence that your behaviour reflects these values in real situations.
Questions often ask how you’ve supported others, handled ethical decisions, resolved conflicts, or maintained professionalism under pressure. Strong answers combine genuine examples with clear explanations of how your actions reflected the organisation’s values.
Competency vs Strengths vs Values-Based Interviews
Feature | Competency Interview | Strengths-Based Interview | Values-Based Interview |
Focus | Past behaviour and skills | Natural strengths and motivation | Values, behaviours and cultural fit |
Evidence Required | High | Moderate | Moderate |
Typical Questions | “Tell me about a time…” | “What do you enjoy doing?” | “How do you demonstrate our values?” |
Common Employers | Civil Service, Corporate | Graduate Schemes | NHS, Public Sector |
Best Preparation | STAR examples | Identify your strengths | Research organisational values |
Which Interview Format Is the Most Challenging?
There isn’t a single interview format that’s harder than the others because each assesses different qualities. A competency interview requires detailed evidence from your previous experience, a strengths-based interview explores your natural motivations, and a values-based interview measures how well your behaviours align with an organisation’s culture.
Many candidates compare behavioural vs situational interview questions when preparing, but competency interviews usually focus on real past experiences, while strengths and values-based interviews place greater emphasis on personal behaviours, motivation, and judgement. The key to success is recognising the interview style before you begin preparing.
How to Prepare for Each Interview Type
Although every interview is different, your preparation should match the assessment method being used. Trying to prepare for every interview in the same way often leads to weaker answers.
Interview Type | Best Preparation Strategy |
Competency Interview | Prepare STAR examples linked to the job description. |
Strengths-Based Interview | Identify your natural strengths and explain what motivates you. |
Values-Based Interview | Research the organisation’s values and prepare relevant examples. |
Mixed Interview | Practise adapting your answers to different question styles. |
Candidates preparing for competency interviews often benefit from Competency-Based Interview Coaching, where they learn how to structure evidence-based answers that match employer expectations and competency frameworks.
Common Mistakes Candidates Make
Regardless of the interview format, many candidates lose marks because they misunderstand what interviewers are actually assessing.
Poor Communication
Answers that are disorganised or overly detailed make it difficult for interviewers to identify the evidence they need. Keep responses clear, structured, and focused on the question being asked.
Weak Credibility
Interviewers expect genuine examples rather than vague statements. Whether discussing a competency or organisational value, explain your personal contribution and the outcome you achieved.
Negative Perception
Professionalism, confidence, and enthusiasm influence every interview. Candidates who remain calm, listen carefully, and engage positively usually create a stronger impression than those who appear rehearsed or defensive.
These three areas are central to The Interview Evaluation Model, demonstrating why communication, credibility, and perception influence every interview, regardless of the question style.
Why Structured Preparation Matters
Many candidates prepare answers without understanding how they’ll be assessed. Structured preparation helps you recognise the interview format, choose stronger examples, and communicate your experience more effectively.
Whether you’re attending a competency, strengths-based, or values-based interview, using The Interview Evaluation Model as your preparation framework helps you present answers that are clear, credible, and easy for interviewers to evaluate.
How Job Interviewology Helps Candidates
Every candidate has different strengths and preparation needs. Some need help structuring competency examples, while others want to improve confidence or prepare for public sector interviews.
Through Professional Interview Coaching, candidates receive personalised feedback to improve communication and interview technique. Graduates preparing for their first professional interviews can build confidence through Graduate Interview Coaching, while candidates facing competency assessments often choose Competency-Based Interview Coaching to develop stronger STAR examples and evidence-based responses.
Final Thoughts
Understanding the difference between a competency vs strengths interview helps you prepare smarter rather than harder. While competency interviews assess previous behaviour, strengths-based interviews explore natural talents, and values-based interviews measure cultural fit, they all reward candidates who communicate clearly and provide credible responses.
By preparing for the correct interview format and applying The Interview Evaluation Model, you can improve your communication, strengthen the credibility of your answers, and create a positive impression throughout the interview process.
Frequently Asked Questions
1. What is the difference between a competency and strengths interview?
Competency interviews assess your past behaviour using real examples, while strengths-based interviews focus on your natural talents, motivation, and the work you genuinely enjoy.
2. What is a values-based interview?
A values-based interview assesses whether your behaviours and decision-making align with an organisation’s culture and core values rather than focusing solely on technical skills.
3. Which interview type is most common in the UK?
Competency interviews remain the most widely used across UK employers, although strengths-based and values-based interviews are increasingly common in graduate recruitment, the NHS, and public sector organisations.
4. Does the NHS use values-based interviews?
Yes. The NHS values interview is commonly used to assess whether candidates demonstrate behaviours that align with the NHS Constitution and its core values.
5. Are strengths-based interviews easier?
Not necessarily. They require honest, spontaneous answers and assess your natural behaviours rather than rehearsed examples.
6. Can one interview include all three formats?
Yes. Many employers combine competency, strengths-based, and values-based questions within a single interview to gain a more complete assessment of each candidate.
7. How should I prepare for different interview formats?
Identify the interview style in advance, prepare relevant examples, research the employer’s values, and practise answering questions clearly and confidently.
8. Can interview coaching improve my interview performance?
Yes. Professional coaching helps you understand how interviews are assessed, refine your answers, improve confidence, and adapt effectively to different interview formats.