For decades, organisations obsessed over IQ. Cognitive ability was treated as the single best predictor of professional success. Hire the smartest people, the thinking went, and the rest would follow.
The data tells a different story.
What the Research Actually Shows
A landmark study by TalentSmart found that emotional intelligence (EQ) accounts for 58% of performance across all job types. In a separate analysis of over one million people, EQ was found to be the strongest predictor of performance — outranking both IQ and experience.
People with high emotional intelligence earn, on average, $29,000 more per year than their lower-EQ counterparts. That’s not marginal. It’s transformative.
What EQ Actually Is — and Is Not
Emotional intelligence is not about being “nice” or avoiding conflict. It’s a set of distinct, measurable capabilities:
- Self-awareness — knowing how your emotions affect your thinking and behaviour
- Self-regulation — managing disruptive emotions and impulses under pressure
- Motivation — pursuing goals for reasons beyond status or money
- Empathy — reading and responding to the emotional states of others
- Social skills — building rapport, managing networks, and influencing effectively
A person with a 130 IQ who can’t manage conflict, misreads their team’s emotional signals, or buckles under pressure will often underperform a colleague with a 110 IQ and high EQ.
The Team Building Implication
When building teams, most managers focus on skills and experience. EQ rarely features in the hiring conversation — yet it often determines whether a group of skilled individuals becomes a functioning team or a set of competing soloists.
Team cohesion, psychological safety, clear communication, and productive friction all depend on the collective emotional intelligence of the group. Teams with mixed EQ profiles — some high, some low — tend to show predictable failure points that reappear in retrospectives and reviews.
Developing EQ in Your Team
Unlike IQ, emotional intelligence is trainable. Targeted coaching, structured reflection, and role-appropriate challenge have all been shown to increase EQ scores over 6–12 months.
The first step is measurement. You can’t improve what you haven’t defined. Understanding each person’s EQ profile — strengths and vulnerabilities — lets managers and coaches intervene precisely rather than generically.
Practical starting points
- Use a reputable EQ assessment and share results sensitively, with consent.
- Coach for one behaviour at a time (for example, pausing before responding under pressure).
- Build feedback routines: regular, low-stakes feedback strengthens empathy and social skills.
- Design stretch assignments that require collaboration, not just technical excellence.
- Model it: leaders who name emotions and repair ruptures set the tone for the team.
The Bottom Line
Smart teams aren’t built by hiring the highest IQ scores. They’re built by understanding the whole human — cognitive ability plus emotional capability — and creating conditions where both can operate at their best.
If your team’s performance is inconsistent, if collaboration is harder than it should be, or if talented people are underdelivering, the answer is rarely a simple skills gap. More often, it’s an EQ gap.