Personality tests in hiring: how AI spots candidates who sugarcoat answers

Personality tests are a step many HR teams are adding to their hiring process. The two popular ones are the MBTI test and the DISC test. The problem is that every candidate knows how to pick the answer that sounds good. So a personality test on its own says little about real work ability.

MONA's recruitment AI Agent solves this differently. The candidate takes the personality test, then the AI immediately cross-checks it against their answers in a real situational interview. The results merge into a single scorecard that HR can read in minutes, instead of guessing.

What is a personality test in hiring

A personality test in hiring is a set of questions that measures a candidate's behavioral tendencies. It shows how the candidate makes decisions and how they react under pressure. The two popular ones are the MBTI test and the DISC test. MBTI sorts candidates into 16 types across 4 pairs of personality axes, while DISC sorts them into 4 behavior groups at work. The result does not grade good or bad, it only describes tendencies, so HR needs to read it alongside the specific job context for it to be useful.

Personality testing for hiring is now common among Vietnamese businesses, but most still stop at sending a link and reading the results by eye. In the article What is AI recruitment we explain the whole system more broadly, and the personality test is only one small piece of it.

How MBTI and DISC differ

The MBTI test looks at how a person recharges, takes in information, makes decisions and organizes life. The result is one of 16 personality types, such as INTJ or ESFP. The DISC test looks more narrowly, focusing on behavior in teamwork and under pressure. It is good for predicting communication style with customers or colleagues.

Many HR teams use both at once. MBTI helps you understand overall thinking, while DISC predicts how a candidate reacts in specific work situations. Combining the two makes candidate evaluation less one-sided than relying on a single test.

Why a personality test alone is not enough for hiring

This is the part we want to say plainly so you do not expect the wrong thing. A personality test measures tendencies, not real work ability. A candidate can easily choose the answer that sounds good rather than the one that is true to them.

Theo Harvard Business Review, a personality test used alone predicts job performance less accurately than expected. Reliability only improves when you add real behavioral data from the candidate. MONA advises clients to treat a personality test as one reference layer. The decision to hire or not still has to rest on a live interviewer and a real job challenge.

How MONA's recruitment AI Agent analyzes personality together with a situational interview

The process starts at the step AI CV screening, and only candidates who meet the criteria are invited to take the online personality test. Right after, the system moves the candidate into the automated interview with a recruitment AI Agentround. The AI asks real work situations instead of generic theory questions.

The AI cross-checks the situational answers against the personality test results, looking for matches and mismatches. For example, a candidate's DISC result says decisive, but they dodge every situation involving conflict. The system flags it for HR to look at more closely, rather than taking the personality test literally.

Why hand the personality test analysis to AI instead of reading it by hand

Reading personality test results by hand takes time and drifts with the reader's feelings. Two HR staff reading the same DISC test can reach two different conclusions. The AI Agent reads personality tests against a fixed set of criteria tied to the specific job requirements. So the conclusion does not change depending on who reads it or what mood they are in that day.

The AI is also much faster. As soon as a candidate submits the personality test, the cross-check result is ready almost instantly. HR does not have to wait until they are free to read each profile by hand.

The combined scorecard: personality, real situations and skills

The final result is not a lone personality test score. It is a scorecard that merges several layers of data: skills from the CV and situational interview answers. The personality test is just an extra behavioral reference layer. This scorecard is stored in recruitment management software, where HR can filter by position and review it anytime without going back to the candidate.

This approach is part of the direction AI recruitment automation that MONA is rolling out for many businesses. Combining personality tests with real behavioral data makes candidate evaluation more accurate and no longer depends on one person's gut feeling.

Which industries can use AI-based personality testing

Personality testing combined with an AI Agent works across many industries, as long as the job needs the right person in the right role.

• Retail: measures extraversion and stress tolerance with crowds before assigning staff to weekend peak shifts.
• Factories and manufacturing: when hiring workers in large numbers, an AI Agent helps screening 1,000 CVs in 3 hours. The personality test quickly filters the group suited to shift work and following procedures.
• Spas and clinics: customer-facing roles need the DISC test to choose people who are patient, pleasant on the phone and not quick to lose their temper with customers.
• Customer service: pair the personality test with recruitment chatbot to pre-screen hundreds of candidates asking questions at the same time during the urgent hiring peak.

Many HR teams already apply this approach through applying AI in the HR department, not only in the initial hiring step.

FAQ

What is the MBTI test?

The MBTI test is a personality test that sorts candidates into 16 types across 4 pairs of personality axes. The four pairs are extraversion or introversion, intuition or sensing, thinking or feeling, and judging or perceiving. The result describes tendencies in thinking and decision making. It is not a right or wrong score.

How is the DISC test different from MBTI?

The DISC test focuses on behavior at work and sorts people into 4 groups: Dominance, Influence, Steadiness, Compliance. MBTI looks at overall thinking, while DISC looks at how a candidate reacts in day-to-day work. The two complement each other rather than replace each other.

Can personality tests be trusted in hiring?

Personality tests are reliable as a reference, but should not be the only basis for a hiring decision. Gartner also recommends that HR teams combine them with real behavioral data. For example, a situational interview or a job test, before making the final decision.

How does AI analyze personality?

AI analyzes personality by reading the personality test results. It then compares them with situational interview answers and other behavioral data in the profile. If a test and the real situation do not line up, the AI flags it so HR can take a closer look. The system never rejects or accepts a candidate based on a single test.

Start using an AI Agent to analyze candidate personality with MONA

MONA was founded in 2016, has 60+ staff, and has delivered more than 14,000 technology projects for Vietnamese businesses. The rate of clients who come back to use our services is 85%. The personality test layer combined with situational analysis sits within the the AI Agent suite recruitment suite MONA is building. The suite also has CV screening, automated interviews and a recruitment chatbot.

Internally, MONA uses this very recruitment AI Agent to hire for its own Account position. The cost is about 12,000 VND per candidate, automating about 80% of the process. The engineering team behind this system belongs to Mona Software. If you want to learn more about using AI in HR management yourself, you can check out Khánh Hùng Academy.

According to a report by McKinsey, businesses applying AI to HR processes are growing fast. The reason is that AI saves screening time while keeping decision quality. If your HR team spends a lot of time reading personality tests and still has to guess, we can demo a different way live. The AI Agent merges the personality test with a situational interview into one scorecard.

Book a demo at book a recruitment AI Agent consultation, or call the hotline 1900 636 648. We will advise on the process that fits your industry right away.

This kind of personality test is part of the assessment suite of the AI recruitment software Gấu Tuyển Dụng, read more about applying AI in recruitment.