The hot hand fallacy is the belief that we can better estimate the outcome of tests of skill if we weigh recent results more heavily than less recent results. It was first identified by Gilovich, Vallone, and Tversky in 1985 [Gilovich 1985]. They found that the belief that basketball players can have "hot hands," leading to streaks of successful shooting, is without statistical foundation. That is, players do have "hot streaks" and "cold streaks," but the streaks that do happen are consistent with random chance.
Nevertheless, people do believe in the "hot hand," in basketball, and at work.
When someone has succeeded at a string of assignments, managers and executives tend to attribute that success, without proof, to the performer's innate capabilities. And the longer the string of successes, the more faith they have in the belief, even though every string of successes has a beginning, before which outcomes were less stellar.
When we believe someone has a "hot hand," we tend to ensure that he or she is fully occupied. Then, when a difficult challenge with a troubled history comes along, we sometimes try to fit it into whatever the hot-handed people are already doing. We add it to their responsibilities, hoping for yet another success. If it doesn't fit well, we make it fit. Voila! Scope creep.
But there's a little more to it. The people whom we regard as having a "hot hand" often regard themselves that way, too. They overestimate their capabilities, partly because of the hot hand fallacy, and perhaps partly due to another cognitive bias called the illusion of control. The illusion of control is our tendency to overestimate our ability to control events that are beyond our control.
For example, a project manager who completes a project successfully might not notice that she was able to retain all of her staff for the life of the project — no key people were suddenly reassigned to other projects. Scope creep often takes place
outside our awareness, due to
misjudgments arising from
cognitive biasesIn many organizations, such a record is rare. But a project manager exulting in success might not notice this fortunate turn of events. Most project managers cannot control these "staff raids," but when they don't happen, the project runs more smoothly. Project managers then might tend to attribute the project's success to their own performance, neglecting to attribute any of it to good fortune. Project managers, or any managers, who attribute successes to their own performance, ignoring good fortune, might be in the grip of the illusion of control. And someone in that state is more likely to accept additional responsibilities when they're offered. Voila! Scope creep.
This example suggests that two people under the influence of different cognitive biases might produce collaborative misjudgments more erroneous than either of them acting independently, if their respective cognitive biases interoperate synergistically. Fascinating. First in this series | Next in this series Top Next Issue
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More articles on Project Management:
- Flanking Maneuvers
- Historically, military logistics practice has provided a steady stream of innovations to many fields,
including project management. But project managers can learn even more if we investigate battlefield tactics.
- Durable Agreements
- People at work often make agreements in which they commit to cooperate — to share resources, to
assist each other, or not to harm each other. Some agreements work. Some don't. What makes agreements durable?
- Symbolic Self-Completion and Projects
- The theory of symbolic self-completion holds that to define themselves, humans sometimes assert indicators
of achievement that either they do not have, or that do not mean what they seem to mean. This behavior
has consequences for managing project-oriented organizations.
- On the Risk of Undetected Issues: II
- When things go wrong and remain undetected, trouble looms. We continue our efforts, increasing investment
on a path that possibly leads nowhere. Worse, time — that irreplaceable asset — passes.
How can we improve our ability to detect undetected issues?
- Down in the Weeds: I
- When someone says, "I think we're down in the weeds," a common meaning is that we're focusing
on inappropriate — and possibly irrelevant — details. How does this happen and what can
we do about it?
Forthcoming issues of Point Lookout
- Coming January 17: High Falutin' Goofy Talk: II
- Speech and writing at work are sometimes little more than high falutin' goofy talk, filled with puff phrases of unknown meaning and pretentious, tired images. Here's Part II of a collection of phrases and images to avoid. Available here and by RSS on January 17.
- And on January 24: Understanding Delegation
- It's widely believed that managers delegate some of their own authority and responsibility to their subordinates, who then use that authority and responsibility to get their work done. That view is unfortunate. It breeds micromanagers. Available here and by RSS on January 24.
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- Person-to-Person Communications: Models and Applications
- When we talk, listen, send or read emails,
read or write memos, or when we leave or listen to voice mail messages, we're communicating person-to-person.
And whenever we communicate person-to-person, we risk being misunderstood, offending others, feeling
hurt, and being confused. There are so many ways for things to go wrong that we could never learn how
to fix all the problems. A more effective approach avoids problems altogether, or at least minimizes
their occurrence. In this very interactive program we'll explain — and show you how to use —
a model of inter-personal communications that can help you stay out of the ditch. We'll place particular
emphasis on a very tricky situation — expressing your personal power. In those moments of intense
involvement, when we're most likely to slip, you'll have a new tool to use to keep things constructive.
Read more about this program. Here's a date for this
- Embassy Suites by Hilton Jacksonville Baymeadows, 9300 Baymeadows
Road, Jacksonville, Florida, 32256, USA: January 15,
Monthly Meeting, Northeast Florida Chapter of the Project Management Institute. Register now.
- Embassy Suites by Hilton Jacksonville Baymeadows, 9300 Baymeadows Road, Jacksonville, Florida, 32256, USA: January 15, Monthly Meeting, Northeast Florida Chapter of the Project Management Institute. Register now.
- Ten Project Management Fallacies: The Power of Avoiding Hazards
- Most of what we know about managing projects is useful and effective, but some of what we know "just ain't so." Identifying the fallacies of project management reduces risk and enhances your ability to complete projects successfully. Even more important, avoiding these traps can demonstrate the value and power of the project management profession in general, and your personal capabilities in particular. In this program we describe ten of these beliefs. There are almost certainly many more, but these ten are a good start. We'll explore the situations where these fallacies are most likely to expose projects to risk, and suggest techniques for avoiding them. Read more about this program. Here's a date for this program:
- The Power Affect: How We Express Our Personal Power
- Many people who possess real organizational power have a characteristic demeanor. It's the way they project their presence. I call this the power affect. Some people — call them power pretenders — adopt the power affect well before they attain significant organizational power. Unfortunately for their colleagues, and for their organizations, power pretenders can attain organizational power out of proportion to their merit or abilities. Understanding the power affect is therefore important for anyone who aims to attain power, or anyone who works with power pretenders. Read more about this program.