The Science of Confidence: What It Is, Why It Matters, and How to Build It
Author: Abel Ese
Introduction
Confidence is often misunderstood by many in today’s world; most people believe that confidence is an innate trait that cannot be learnt, but research tells us a very different story. Psychologists and neuroscientists have spent decades studying why some people trust their abilities while others hesitate, revealing that confidence is not a personality trait, but a trainable mental process shaped by experience, biology, and environment (Bandura, 1997a; McLeod, 2025).
This article will explore the following:
- What confidence really is
- How confidence develops
- Why confidence matters
- Evidence-based strategies to build confidence
What Confidence Really Is
Confidence is more than optimism or positive thinking. The word confidence is derived from the Latin word fidere, which means "to trust" or "to believe”. Psychologists define it as the belief in one’s ability to perform a task or meet a challenge, built through experience and reinforced by feedback (Ruth, 2024). It plays a central role in mental health, motivation, and achievement.
Trust in one’s own powers is known as self-confidence. Confidence in someone or something is based on experience and is therefore strengthened over time. Self-confidence is an important aspect of mental health, allowing people to participate in society by seizing opportunities, overcoming challenges, and managing responsibilities. A chronic lack of self-confidence can seriously impede one’s ability to lead a healthy and productive life. Self-confidence is distinct from self-esteem, which is the evaluation people make of their own worth.
Humans are not born with confidence, rather it is a skill that is learned through practice, action and experience. It’s about taking steps despite fear or uncertainty, which builds trust in one’s abilities. Confidence can fluctuate; it requires consistent practice to maintain.
How Confidence Develops
Confidence grows through repeated experiences of reliability - both in ourselves and in others (Bandura, 1977a; Stajkovic and Luthans, 1998). Over time, as we successfully navigate challenges, our brain learns to trust our abilities. Albert Bandura’s influential work on self-efficacy identifies four key sources of confidence (Bandura, 1977b):
- Mastery experiences: This is the most powerful source of confidence. It is the belief in your personal ability to achieve success in a task. It is only natural for the human brain to update itself when a person succeeds in a task. Repeated success strengthens this belief, while repeated failure weakens it. For example, completing a difficult project at work becomes proof of your capability, reinforcing future confidence in completing more difficult projects.
- Vicarious experience: This experience comes from watching others succeed, especially people who are like you. Seeing someone else succeed provides a mental model: “If Abel can do it, maybe I can too”. For example, seeing someone in a similar background succeed in a task would prompt you to want to attempt it, believing that you can succeed as well. This emphasises that humans can learn confidence socially, not just individually (McLeod, 2025).
- Verbal persuasion: This refers to encouragement, feedback, and reassurance from others. When credible people express belief in your abilities, it can strengthen your own belief – especially during moments of self-doubt. However, Bandura (1977b) noted that this source of confidence is less powerful than direct experience, and it must be realistic to be effective. For example, your line manager recognising your capability can heighten your confidence in your job performance. With supportive feedback your effort increases and you become persistent, which leads to mastery.
- Emotional regulation: This source of confidence refers to how you interpret and manage your emotional and physiological states, such as anxiety, stress, or excitement (American Psychological Association, 2025). The human body is wired to communicate with the brain, but in a situation where you feel anxious, your brain may interpret the signals sent differently, as not being capable. If you learn to regulate your emotions, then the brain will adapt and change its interpretation. For example, using breathing techniques to reduce anxiety in a situation will change how your brain interprets signals sent by your body.
According to Bandura (1997b), these four sources of confidence do not operate in isolation, rather they interact with each other. For example, encouragement (verbal persuasion) leads to taking action, while action creates mastery experiences. Observing others increases the willingness to try or attempt, and emotional regulation determines your persistence in a situation.
Why Confidence Matters
Confidence is not just a nice trait to have – it has measurable effects on how people think, act, and perform. It influences outcomes across education, work, health, and relationships.
- Confidence drives action and persistence – people with higher levels of confidence are more likely to start a task, put in effort, and persist when things get difficult. In contrast, low confidence often leads to avoidance and early withdrawal, even when they have the ability to succeed. Bandura’s work demonstrated that individuals with strong self-efficacy set more challenging goals, stay committed longer, and recover more quickly after setbacks (Bandura, 1997a).
- Confidence improves performance – confidence has a direct impact on performance outcomes. The reasons are because confident people focus better under pressure, interpret challenges as manageable, and use more effective problem-solving strategies (Stajkovic and Luthans, 1998).
- Confidence shapes how you handle stress – confidence changes how the human brain interprets stress. According to research by the American Psychological Association, people with higher self-efficacy are more likely to view stress as a challenge rather than a threat, use adaptive coping strategies, and experience lower anxiety in demanding situations (American Psychological Association, 2025).
- Confidence influences learning and growth – according to Dweck, belief in one’s ability to improve leads to greater willingness to learn, increased resilience after failure, and higher long-term achievement (Dweck, 2006).
- Confidence affects decision-making – appropriate confidence improves decisiveness and judgement, while overconfidence can lead to errors and risk-taking, and under-confidence can result in missed opportunities (Kahneman, 2011).
Evidence-Based Strategies to Build Confidence
- Build mastery through small and progressive wins
- Use modelling (learn by watching others)
- Leverage constructive feedback and encouragement
- Regulate stress and anxiety
- Adopt a growth mindset
- Take action before you feel ready
- Build competence through deliberate practice
Conclusion
The science of confidence reminds us that we are not defined by our doubts but by the actions we take despite them. Confidence grows when we give ourselves permission to try, to learn, and to improve. With the right tools and a willingness to practise, anyone can build a stronger sense of trust in their abilities. As you move forward, remember that confidence is not a destination but a continuous process—one that becomes more natural each time you choose to believe in yourself.
About the Author
Abel is a Learning and Development Lead at the Estia Centre. He has a clinical background as a senior support worker and activity practitioner. He’s also a professional science teacher and adult trainer for over 13 years.
References
American Psychological Association (2025) Self-efficacy: The theory at the heart of human agency. Available at: https://www.apa.org/research-practice/conduct-research/self-efficacy-human-agency (Accessed: 2 May 2026).
Bandura, A. (1977a) ‘Self-efficacy: Toward a unifying theory of behavioral change’, Psychological Review, 84(2), pp. 191–215.
Bandura, A. (1997b) Self-efficacy: The exercise of control. New York: Freeman. Available at: https://fullpdfword.com/look-up/mL82D8/604068/5020748-bandura-1997-self-efficacy-the-exercise-of-control . (Accessed: 23 April 2026).
Dweck, C.S. (2006) Mindset: The new psychology of success. New York: Random House. Available at: https://togetherthevoice.org/wp-content/uploads/2024/06/Mindset_-The-New-Psychology-of-Success.pdf (Accessed: 26 May 2026).
Kahneman, D. (2011) Thinking, fast and slow. London: Penguin. Available at: https://cdn.penguin.co.uk/dam-assets/books/9780141033570/9780141033570-sample.pdf (Accessed: 26 May 2026).
McLeod, S. (2025) Self-efficacy: Bandura’s theory of motivation in psychology (Reviewed) Available at: https://www.simplypsychology.org/self-efficacy.html (Accessed: 3 May 2026).
Ruth, M. (2024) ‘Confidence’, EBSCO Research Starters. Available at: https://www.ebsco.com/research-starters/psychology/confidence (Accessed: 20 April 2026).
Stajkovic, A.D. and Luthans, F. (1998) ‘Self-efficacy and work-related performance: A meta-analysis’, Psychological Bulletin, 124(2), pp. 240–261.