How to read your team's personality picture

A team report always has several parts: alongside the aggregate personality picture there is the map of team roles, the trust network, and the assessment of psychological safety. This article covers just one of those elements, the aggregate personality picture.

How a team works cannot be explained by simply adding up individual personality scores. Among other things, the task matters, and so do leadership, role clarity, the team's history, and the way shared working rules are formed. The shared profile sheds light on where it is worth starting conversations and looking closer.

What do the team and the leader see?

Straight after completing the questionnaire, each participant sees only their own personality profile. The report prepared for the leader and the team as a whole is built on those results, and the consultant approves it. It shows a shared team picture: the team average per dimension, the bands of internal diversity, and a shared interpretation of both. The report contains no rows by name, and it does not show any other team member's individual score.

Each team member's own view is more personal than that. They can compare their own values with the team's aggregate picture. That comparison concerns only them, and it gives no access to colleagues' profiles.

Dynamics do not follow from the team picture

In 2006 Peeters and colleagues summarised dozens of studies on how a team's personality composition relates to its performance. They found a meaningful link for two traits: where the team average for Agreeableness and Conscientiousness was higher, the team typically performed better.

This result is notable because it was produced with the Big Five model – the framework in which Honesty-Humility does not even appear as a separate dimension. In other words, the link was detectable with a narrower instrument too.

In the research it was most clearly detectable in real workplace teams. In student teams it all but disappeared. The authors' explanation is simple: a professional team works together over a longer period, and its members depend on each other more.

One thing has to be stated, though. Comparing many teams reveals the tendency, but the performance of a single team cannot be predicted from it. The link with performance is moderate, and it did not show up for the remaining five traits at all.

The same research found something else that belongs to reading diversity: for these two traits, the more similar teams performed better. So the members of well-functioning teams scored both highly and close to each other on Agreeableness and Conscientiousness. This does not mean diversity is a problem. It means that in these two areas a shared baseline is worth more than variety – and elsewhere it may be exactly the other way round.

Bell's 2007 meta-analysis found associations of a similar magnitude and emphasised the role of context. The 2024 pre-registered analysis by Van Dijk and colleagues examined the effects of personality diversity. The overall picture is that there is no optimal composition valid for every team. The right pattern depends on the task and the environment.

In practice this means the aggregate picture is best read as a collection of hypotheses. Every proposition has to be checked against the team's own examples. That step cannot be skipped.

What do the team average and internal diversity mean?

This is what the aggregate slice of the report looks like:

Aggregate team profile

Team average and internal diversity - without individual results

Honesty-Humility

Team average: 58Internal diversity: moderate

Emotionality

Team average: 47Internal diversity: moderate

Extraversion

Team average: 61Internal diversity: moderate

Agreeableness

Team average: 72Internal diversity: narrow

Conscientiousness

Team average: 54Internal diversity: wide

Openness

Team average: 66Internal diversity: moderate

Each row tells you two things: where the dot sits (the team average) and how wide the band is (the internal diversity). In the example above, the band on Agreeableness is narrow and the one on Conscientiousness is wide – the same team works similarly in one area and in several ways in the other.

The team average is one starting point of the shared profile. A higher average C Conscientiousness may suggest, for example, that planning and consistent execution matter in how the team works. It does not follow that everyone works the same way. The report rather raises the question of whether enough room remains for replanning when the situation changes.

Alongside a higher average A Agreeableness, it is worth examining whether uncomfortable professional disagreements also get space in the smooth cooperation. And a higher X Extraversion average does not tell you who speaks a lot or a little. It rather directs attention to whether thoughts formed in writing get room alongside quick spoken reactions.

The band of internal diversity indicates how similar or different the response patterns behind the aggregate picture are. A wider band may mean several ways of working are present. The report deliberately does not show who sits where within the band. So the shared question is not „who is the outlier”, but in which situations this diversity may become important.

This matters especially for sensitive dimensions such as H Honesty-Humility. The consultant's interpretation can start a conversation about fairness and about less visible work. It is not suitable for inferring anyone's intentions or integrity.

What should you look at first?

Do not ask who or what might cause a problem. Examine instead in which situations your ways of working and your attitudes might diverge, and what jointly agreed rule you will handle that with.

Look at the average and the width of the diversity separately. Pay particular attention to the E Emotionality dimension. It is not simply the inverse of neuroticism, and the emphases fall elsewhere. Tie every label and direction to the technical description of the scale in use.

An example of the first thirty minutes

Suppose the report shows wide diversity on the X Extraversion dimension. The tempting reading is that the quieter colleagues need to be drawn out. That would already be a solution, when the problem has not even been established.

The usable first step is a question. „In the last five meetings, who gave their substantive view, and who did not?” The team can answer that with concrete examples. The answers reveal whether the unevenness of participation bothers them at all, and where it may come from.

If it does cause a problem, an experiment can follow. Staying with the example: views can arrive in writing before the meeting, the team gets more preparation time, or, if it feels comfortable, you can introduce a round of questions at the end. Look at whether it worked a few weeks later. The report provided the frame for that opening question.

This is of course just one example picked out; practice throws up all kinds of situations – and we help uncover those too.

Growing together

The aggregate picture becomes genuinely useful when the team checks the hypotheses read from it against its own examples. A workshop facilitated by a consultant then helps work through those points and turn them into shared and individual development paths. These results and conversations do not, of course, replace performance data or leadership observation.

You can read a practical example in our anonymised team story. It follows the very example above: how a wide Extraversion band turned into written decision preparation in one team.

Limitations and sources

The research cited describes average, group-level associations. It is not suitable for predicting the behaviour of a particular team member or a team's future performance. The effect sizes are moderate and depend heavily on the task and the organisational context.

The next step is how to introduce it. Our article on introducing a psychometric assessment covers that.

• Peeters et al. (2006): meta-analysis of personality and team performance
• Bell (2007): meta-analysis of deep-level team composition and performance
• Van Dijk et al. (2024): registered meta-analysis on personality diversity
• Official HEXACO scale descriptions

The research describes average, group-level associations. It does not allow confident prediction of a particular team member's behaviour or of a team's future performance. Other people's individual results cannot be reliably inferred from the report, and that is not the purpose of the shared interpretation.