Behavioural interviewing, developed in the 1970s and popularised through the work of industrial psychologist Tom Janz, is based on a well-validated principle: the best predictor of future job performance is demonstrated past performance in relevant situations. Asking a candidate how they would theoretically handle a challenge (a hypothetical or situational question) produces answers that are often idealised and not grounded in actual capability. Asking a candidate how they actually handled a comparable challenge in a past role produces evidence of real behaviour.
Behavioural interview questions follow a characteristic pattern: they begin with "Tell me about a time when..." or "Describe a situation where you had to..." or "Give me an example of how you..." They are open-ended prompts that require the candidate to access their actual experience rather than formulate a theoretical response.
The difference between a behavioural and a situational question is temporal: behavioural questions are retrospective (what did you do?), situational questions are prospective (what would you do?). Both are used in structured and competency-based interviews, and both have research support for predictive validity. Behavioural questions tend to be more reliable for experienced candidates who have a relevant history of comparable situations; situational questions may be more informative for early-career candidates who have limited work experience.
Follow-up probing is essential in behavioural interviewing. Many candidates respond to behavioural questions with general statements ('I tend to handle conflict by...') rather than specific examples. The interviewer's role is to redirect: 'Can you give me a specific example from your last role?' and 'What specifically did you do in that situation?' until a concrete STAR-structured answer emerges.
Key Points: Behavioural Interview
- Past behaviour principle: Behavioural interviewing is grounded in research showing that past behaviour predicts future behaviour more reliably than hypothetical reasoning.
- Retrospective questions: 'Tell me about a time when...' — questions ask for specific past examples, not theoretical responses.
- Probing requirement: Many candidates default to generalities — skilled interviewers probe for specific examples and outcomes.
- STAR evaluation: Answers are evaluated against Situation-Task-Action-Result completeness and competency-specific behavioural anchors.
- Experience dependency: Behavioural questions work best for candidates with relevant work history — situational questions may complement them for entry-level hiring.
How Behavioural Interview Works in Treegarden
Behavioural Interview in Treegarden
Treegarden's interview scorecard system supports behavioural interview question libraries. Recruiters and HR can build a bank of validated behavioural questions by competency area, which can be selected when configuring scorecards for specific roles. Question suggestions and scoring anchor templates reduce the time required to set up structured evaluations for new roles and ensure consistency in how behavioural evidence is assessed across interviewers.
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Frequently Asked Questions About Behavioural Interview
A good behavioural interview question has three characteristics. First, it is tied to a specific competency that has been identified as predictive of success in the role — 'tell me about a time you managed a conflict' is better than an unfocused experience question. Second, it is open-ended enough to allow a range of answers and STAR-structured responses — questions that lead the candidate toward a specific desired answer or can be answered in one sentence are too narrow. Third, it is fair and non-discriminatory — it asks about work-relevant behaviours without eliciting information about protected characteristics. Additionally, the best behavioural questions have clear scoring anchors that allow interviewers to consistently rate the quality of the evidence provided, turning subjective impressions into comparable evaluations across multiple candidates.
Candidates often respond to behavioural questions with general, hypothetical answers — 'In that situation, I would typically...' — rather than specific past examples. This happens for several reasons: they may not have understood that a specific example is required, they may not have a directly relevant example and are covering, or they may habitually answer questions in the abstract. The interviewer's response is a direct, friendly redirect: 'That's helpful context — could you give me a specific example from a previous role where you did that?' or 'Can you think of a specific time when you faced that situation?' If the candidate continues to give hypothetical answers despite probing, this is itself informative — it may indicate lack of relevant experience, poor self-awareness about their own behaviour, or difficulty with the retrospective reflection that behavioural questions require.
Behavioural interviews require adaptation for early-career and entry-level candidates who have limited professional work experience. The direct adaptation is broadening the scope of acceptable examples: rather than restricting relevant experience to paid professional roles, interviewers should accept examples from internships, academic projects, volunteer work, extracurricular leadership, and relevant life experiences. The questions themselves may need to be reframed — 'Tell me about a time in a team project when...' rather than 'Tell me about a time in a previous role when...' For very early-career hiring, situational questions ('What would you do if...?') combined with a limited set of behavioural questions can provide a fairer picture than a fully behavioural format designed for experienced professionals.
A behavioural interview asks candidates to describe past experiences to demonstrate behavioural competencies — how they handle relationships, manage challenges, and make decisions. A case interview presents a business problem or analytical scenario and asks the candidate to work through it in real time, demonstrating their problem-solving approach, analytical capability, and communication skills under pressure. Case interviews are most common in management consulting, investment banking, and strategy roles. For most professional roles, behavioural and competency-based interviews are more predictively valid than case interviews because they assess how the candidate actually behaves in the types of situations they will face, rather than how they perform on an artificial analytical exercise. Case components may supplement behavioural interviews for roles where structured analytical problem-solving is a core daily requirement.