Editorial review: November 12, 2026
The topic of self-awareness is obviously important for anyone who is seeking to understand themselves and to communicate and act more effectively. So what do we know about the brain based science of self-awareness?
The development of self-awareness
Researchers study aspects of self-awareness by examining how children respond to their reflection. Many children begin showing explicit mirror self-recognition during the second year of life, often around 18 to 24 months. This is a developmental pattern rather than a deadline every child meets in the same way.
In a mirror mark test, researchers place a mark on the child’s face where it cannot be seen directly, then observe the child’s response to a mirror. Reaching toward the mark on their own face is evidence of recognizing the reflection. One response does not measure every aspect of self-awareness; Philippe Rochat’s developmental account distinguishes several levels of self-awareness.
Awareness of your physical body
Another key aspect of self-awareness is the awareness we have of how our body is positioned. You might think that we work this out visually – for example, that when we catch a ball we look at the ball and then look at our arm, and adjust accordingly. But in fact, that’s not the case. Even with your eyes closed, you can still tell where your limbs are positioned. This is a sense (yes, we have more than five senses!) called proprioception.
Signals from muscles, tendons and joints contribute to our sense of body position. This is one reason we can coordinate movement without continuously watching every limb. Self-produced touch can also feel different from externally produced touch, but “it is impossible to tickle yourself” is too absolute. These bodily processes are distinct from reflective judgments about our motives or abilities.
Awareness of your own mind
Metacognition means thinking about your own thinking: noticing what you understand, choosing a strategy and checking whether it worked. Confidence and accuracy can differ, so a useful self-assessment should be compared with evidence such as a completed task, feedback or an observed result.
The Dunning–Kruger research is often reduced to a joke about incompetent people. Its original studies examined mismatches between performance and self-assessment in particular tasks. They do not give us a reliable way to label a colleague from one confident statement. Kruger and Dunning’s original paper provides the research context.
For a practical workplace application, make a prediction before a task, compare it with the result afterward and ask what explains the gap. Perhaps you underestimated the preparation needed, misunderstood the criteria or received help you had not expected. The purpose is a better next decision, not a verdict about intelligence.
Why self-awareness matters so much
One of the reasons that metacognition is so important is that self-awareness is linked to self-regulation. Self-regulation refers to the ability to manage your emotions in a productive way – for example, the ability to stay calm and not lose your temper when you have to deal with an overbearing colleague. This process requires you to suppress some emotional responses and plan for the future in order to achieve a long term goal – in this case, to get your work project completed and not to get fired.
There’s a test of self-regulation that’s often performed with kids, called the marshmallow test. The test is simple: you take a child, and tell them they can either have one marshmallow now, or two marshmallows in ten minutes. While kids would obviously prefer to have two marshmallows than one, this is a tough test because children often lack a firm understanding of time – so “in ten minutes” seems like it could be forever for a child. The test requires that the children prioritize their future happiness at having two marshmallows later on, over the current desire to have one marshmallow now.
Early marshmallow studies found associations between waiting and some later outcomes. A 2018 conceptual replication by Watts, Duncan and Quan found that the achievement association became substantially smaller after accounting for family background, early cognitive ability and home environment. The studies do not show that teaching a child to wait for a treat will cause later career or health success. Read the replication and its limitations.
These studies examine different aspects of self-awareness and should not be treated as one test of leadership effectiveness. To apply reflection at work, choose a specific behavior, seek feedback and review what changes. See self-aware leadership for a practical feedback process.
Sources and further reading: Philippe Rochat: Five Levels of Self-Awareness as They Unfold Early in Life.
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