# Personality tests at work: what DISC and MBTI can and cannot do for managers Personality tests at work, when DISC/MBTI help managers and when they harm trust on engineering teams. According to iSilta's 2026 survey of 146 organizations, 81% do not measure behavior change after manager training. Use this guide to move from generic advice to week by week manager habits on engineering teams. ## Why are personality tests popular at work? **Why are personality tests popular at work is a manager practice that turns personality tests at work into predictable team behavior, not a poster on the wall.** Engineering managers win when personality tests at work is treated as operational data, not a one time workshop. According to iSilta's 2026 survey of 146 organizations, 81% do not measure behavior change after manager training. That pattern shows up when managers lack shared context about how each person communicates, prioritizes, and recovers from stress. On software teams, DISC at work and MBTI team building intersects with delivery pressure, on call load, and review culture. Document what you learn in 1 on 1 notes and team forums so improvements survive reorgs. Prefer small experiments over big bang programs; measure behavior in the next sprint retro, not only in annual surveys. If you are starting from zero, pick one report and one team ritual to change this week. Ask what would make personality tests at work easier for them, then close the loop publicly. Teams trust managers who act on listening, not managers who collect more forms. Pair this work with shared profiles and action points after 1 on 1s so context survives handoffs. When personality tests at work shows up in skip levels and retros, not only in HR decks, you reduce the weak 1 on 1 patterns that show up when training arrives too late. ## What do DISC and MBTI actually measure? **What do DISC and MBTI actually measure is a manager practice that turns personality tests at work into predictable team behavior, not a poster on the wall.** Engineering managers win when personality tests at work is treated as operational data, not a one time workshop. According to iSilta's 2026 survey of 146 organizations, 81% do not measure behavior change after manager training. That pattern shows up when managers lack shared context about how each person communicates, prioritizes, and recovers from stress. On software teams, DISC at work and MBTI team building intersects with delivery pressure, on call load, and review culture. Document what you learn in 1 on 1 notes and team forums so improvements survive reorgs. Prefer small experiments over big bang programs; measure behavior in the next sprint retro, not only in annual surveys. If you are starting from zero, pick one report and one team ritual to change this week. Ask what would make personality tests at work easier for them, then close the loop publicly. Teams trust managers who act on listening, not managers who collect more forms. Pair this work with shared profiles and action points after 1 on 1s so context survives handoffs. When personality tests at work shows up in skip levels and retros, not only in HR decks, you reduce the weak 1 on 1 patterns that show up when training arrives too late. ## Where do tests help managers? **Where do tests help managers is a manager practice that turns personality tests at work into predictable team behavior, not a poster on the wall.** Engineering managers win when personality tests at work is treated as operational data, not a one time workshop. According to iSilta's 2026 survey of 146 organizations, 81% do not measure behavior change after manager training. That pattern shows up when managers lack shared context about how each person communicates, prioritizes, and recovers from stress. On software teams, DISC at work and MBTI team building intersects with delivery pressure, on call load, and review culture. Document what you learn in 1 on 1 notes and team forums so improvements survive reorgs. Prefer small experiments over big bang programs; measure behavior in the next sprint retro, not only in annual surveys. If you are starting from zero, pick one report and one team ritual to change this week. Ask what would make personality tests at work easier for them, then close the loop publicly. Teams trust managers who act on listening, not managers who collect more forms. Pair this work with shared profiles and action points after 1 on 1s so context survives handoffs. When personality tests at work shows up in skip levels and retros, not only in HR decks, you reduce the weak 1 on 1 patterns that show up when training arrives too late. ## Where do tests damage psychological safety? **Where do tests damage psychological safety is a manager practice that turns personality tests at work into predictable team behavior, not a poster on the wall.** Engineering managers win when personality tests at work is treated as operational data, not a one time workshop. According to iSilta's 2026 survey of 146 organizations, 81% do not measure behavior change after manager training. That pattern shows up when managers lack shared context about how each person communicates, prioritizes, and recovers from stress. On software teams, DISC at work and MBTI team building intersects with delivery pressure, on call load, and review culture. Document what you learn in 1 on 1 notes and team forums so improvements survive reorgs. Prefer small experiments over big bang programs; measure behavior in the next sprint retro, not only in annual surveys. If you are starting from zero, pick one report and one team ritual to change this week. Ask what would make personality tests at work easier for them, then close the loop publicly. Teams trust managers who act on listening, not managers who collect more forms. Pair this work with shared profiles and action points after 1 on 1s so context survives handoffs. When personality tests at work shows up in skip levels and retros, not only in HR decks, you reduce the weak 1 on 1 patterns that show up when training arrives too late. ## What should engineering leaders do instead? **What should engineering leaders do instead is a manager practice that turns personality tests at work into predictable team behavior, not a poster on the wall.** Engineering managers win when personality tests at work is treated as operational data, not a one time workshop. According to iSilta's 2026 survey of 146 organizations, 81% do not measure behavior change after manager training. That pattern shows up when managers lack shared context about how each person communicates, prioritizes, and recovers from stress. On software teams, DISC at work and MBTI team building intersects with delivery pressure, on call load, and review culture. Document what you learn in 1 on 1 notes and team forums so improvements survive reorgs. Prefer small experiments over big bang programs; measure behavior in the next sprint retro, not only in annual surveys. If you are starting from zero, pick one report and one team ritual to change this week. Ask what would make personality tests at work easier for them, then close the loop publicly. Teams trust managers who act on listening, not managers who collect more forms. Pair this work with shared profiles and action points after 1 on 1s so context survives handoffs. When personality tests at work shows up in skip levels and retros, not only in HR decks, you reduce the weak 1 on 1 patterns that show up when training arrives too late. ## How do you discuss types without stereotyping? **How do you discuss types without stereotyping is a manager practice that turns personality tests at work into predictable team behavior, not a poster on the wall.** Engineering managers win when personality tests at work is treated as operational data, not a one time workshop. According to iSilta's 2026 survey of 146 organizations, 81% do not measure behavior change after manager training. That pattern shows up when managers lack shared context about how each person communicates, prioritizes, and recovers from stress. On software teams, DISC at work and MBTI team building intersects with delivery pressure, on call load, and review culture. Document what you learn in 1 on 1 notes and team forums so improvements survive reorgs. Prefer small experiments over big bang programs; measure behavior in the next sprint retro, not only in annual surveys. If you are starting from zero, pick one report and one team ritual to change this week. Ask what would make personality tests at work easier for them, then close the loop publicly. Teams trust managers who act on listening, not managers who collect more forms. Pair this work with shared profiles and action points after 1 on 1s so context survives handoffs. When personality tests at work shows up in skip levels and retros, not only in HR decks, you reduce the weak 1 on 1 patterns that show up when training arrives too late. ## How do personality tests at work practices compare? Approach Strength Risk Ad hoc conversations Fast to start Inconsistent across reports; hard to scale Shared written profiles Reduces guessing; helps hybrid teams Stale if never revisited in 1 on 1s Pulse and 1 on 1 loop Connects listening to action Fails if leaders skip follow through ## Implementation steps * Clarify why personality tests at work matters to your team this quarter. * Co create norms with reports; do not publish mandates without input. * Pilot for two weeks; gather friction in 1 on 1s. * Publish what changed because people spoke up. * Revisit after org or role changes. ## Frequently asked questions Should managers use DISC or MBTI? Use them only as conversation starters with informed consent, not for hiring, ranking, or excuses. What is the risk? Fixed labels reduce curiosity, enable bias, and violate validity if treated as science for selection. What works better? Behavioral working style questions tied to real collaboration scenarios. Can tests ever help? Optional team workshops can build vocabulary if facilitators emphasize growth and context. Related: working style assessment questions, communication styles at work, psychological safety survey questions. Prefer prepared conversations over memory alone? Explore iSilta features or try the product demo. Canonical: https://isilta.com/blog/personality-tests-at-work-disc-mbti/