Ellen Langer’s 1975 research at Harvard produced one of the more uncomfortable findings in decision psychology. People do not just overestimate their control in situations where skill matters. They overestimate it in situations that are entirely determined by chance — as long as those situations contain cues that normally signal skill. Choose your lottery ticket rather than being assigned one, and you will demand more money to give it up. Roll the dice yourself rather than having someone roll for you, and you will throw harder when you need a high number.

Entrepreneurship contains every skill cue Langer identified. You choose the market, the product, the team. You are deeply familiar with the domain. You are maximally involved. The illusion of control is not incidental to building a business — it is structurally embedded in what building a business feels like.

How the illusion gets built into the experience of founding

Langer defined the illusion of control as an expectancy of personal success that exceeds the objective probability of the outcome. The mechanism activates when chance situations contain skill-relevant features — competition, choice, familiarity, active involvement. Each of these features makes the situation feel like one where effort and ability determine outcomes, even when they do not.

For entrepreneurs, the practical expression of this is confusing activity with causation. You took action, something happened, so you caused it. The product launched, sales grew, therefore the launch strategy worked. The client meeting went well, the deal closed, therefore your negotiation was the deciding factor. Each of these conclusions may be partially right. They are also systematically more control-affirming than the evidence warrants, because timing, competitor mistakes, market conditions, and luck contributed to every outcome — and none of those factors leave a clear signature.

A meta-analysis by Engel and colleagues, published in the Journal of Business Venturing in 2022, examined overconfidence across 62 primary studies and found that it stimulates opportunity assessment and venture creation in early stages — and negatively affects venture performance at later ones. The same cognitive pattern serves two opposing functions depending on which phase of the venture it operates in.

Why experience makes the illusion stronger, not weaker

The self-serving attribution mechanism is what prevents experience from correcting the illusion. Miller and Ross’s foundational research established the asymmetry: people attribute successes to personal agency and failures to external factors. The practical consequence is an experience base that systematically overstates the entrepreneur’s causal influence.

Every success attributed internally deepens the sense of control. Every failure attributed externally — bad timing, a difficult market, an unreliable partner — provides no corrective signal about personal overconfidence. Hayward, Shepherd, and Griffin’s hubris theory of entrepreneurship, published in Management Science in 2006, documented how this compounds across a career: overconfident entrepreneurs who survive early ventures carry amplified illusions of control into subsequent ones, having learned the wrong lesson from the experience.

The post-mortem problem follows directly. Entrepreneurs who conclude “we succeeded because of our execution” when execution was one of several contributing factors extract a lesson that will not transfer. The self-serving attribution does not just distort their self-perception — it corrupts the learning that would otherwise make them better.

If the pattern described here maps closely onto your experience — consistently attributing setbacks to external factors while attributing wins to your own ability, persisting with a direction past the point where the evidence supports it — that is worth examining with someone outside the business. An organisational psychologist can look at the specific attribution patterns in your situation in ways that general research cannot.

The paradox worth sitting with honestly

Over 80% of entrepreneurs in one study estimated their chances for success at 70% or higher. Nearly a third estimated their chances at 100%. Statistically, approximately 75% of those ventures would fail.

This is not a straightforward case for correcting the bias. The entrepreneurs who did not overestimate their control largely did not start. The belief in personal influence over uncertain outcomes is what motivates entry in the face of base rates that would rationally deter most people. Langer’s illusion is not a malfunction — it is a prerequisite for entrepreneurial action.

What it is also is a liability in specific and predictable phases. The same overestimated control that produced the decision to start produces under-preparation for external risk, insufficient contingency planning, and the most consequential expression of the pattern: staying in a failing business too long.

The entrepreneur who persists through clear warning signals is usually not failing to read them. They are reading them and attributing them to controllable factors that continued effort can address. The illusion converts what should be an exit decision into a persistence decision — and that conversion is invisible from the inside.

Separating what you control from what you do not

The Stoic distinction between what is within one’s control and what is not — response, effort, quality of thinking versus market conditions, competitor behaviour, timing — is the most practically applicable framework for working with this bias rather than being governed by it.

The practical application is not to abandon the belief in personal agency. It is to apply it more precisely. Categorising decisions before making them: is the primary driver of this outcome something within my influence, or something largely external? If external factors dominate, what does preparation for those factors look like — rather than more effort directed at the internal factors I am already overweighting?

A book worth reading alongside this

Fooled by Randomness by Nassim Taleb is the closest analogue to the entrepreneur experience available in this literature. Taleb’s account of how traders mistake random success for skill, and how survivorship bias produces confident narratives about control that collapse on examination, maps directly onto the mechanisms this article describes. For any entrepreneur who has found themselves more certain of their causal influence after a run of successes than before it, it is the most honest starting point.

This article discusses psychological patterns documented in research on cognitive bias and entrepreneurial behaviour. It is not designed to identify, diagnose, or assess any psychological condition, and it is not a substitute for professional support. The patterns described here are well-documented features of human cognition — recognising yourself in them is not a cause for alarm. If, however, you find that these patterns are significantly affecting your work, relationships, or wellbeing, speaking with a psychologist or therapist can provide personalised guidance that an article cannot.

This article is for educational and informational purposes only. It is not a substitute for professional psychological advice, diagnosis, or treatment. If you are experiencing significant psychological distress, please consult a qualified mental health professional.

Sources: Langer, E.J. (1975), Journal of Personality and Social Psychology, 32(2). Miller, D.T. & Ross, M. (1975), Psychological Bulletin, 82(2). Hayward, M.L.A., Shepherd, D.A. & Griffin, D. (2006), Management Science, 52(2). Engel, Y. et al. (2022), Journal of Business Venturing, 37(3), meta-analysis of 62 studies. Cooper, Woo & Dunkelberg (1988), Journal of Business Venturing, 3(2).