Sources of Power: How People Make Decisions (Paperback)

~ Gary Klein (Author) "During the past twenty-five years, the field of decision making has concentrated on showing the limitations of decision makers-that is, that they are not very..." (more)
Key Phrases: recognitional decision making, using mental simulation, fireground commanders, Captain Rogers, Commander's Intent, Marvin Thordsen (more...)

Editorial Reviews

Amazon.com Review

Gary Klein studies decision-making in the field, tagging along with firefighters, standing by in intensive-care units, and watching chess masters play lightning-fast "blitz" games to learn how people make choices with time constraints, limited information, and changing goals. From this research, he and his associates have developed a theory of "naturalistic decision-making."

Sources of Power essentially lends the validity of scientific research to techniques that many of us use every day. There's intuition, which is based not on instantaneous insight but on the rapid (perhaps even subconscious) interpretation of perceptual cues. There's mental simulation, a finely honed method of visualization. There's storytelling and metaphor, which enable decision-makers to devise meaningful frameworks and compare their present situations to previous events. Nobody is born with an inherent mastery of these and other techniques, Klein tells us, but we are all born with the capability to develop, through experience, the skill sets experts call upon to make good decisions. --This text refers to the Hardcover edition.

Review

"Most studies of decision-making treat humans like rats in a laboratory. But Dr. Klein, a cognitive psychologist, spent a decade watching fire commanders, fighter pilots, paramedics, and others making split-second decisions on the job, and this book is a clear and engaging account of his findings."
— Thomas Petzinger, Jr., The Wall Street Journal

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Product Details

• Paperback: 348 pages
• Publisher: The MIT Press (February 26, 1999)
• Language: English
• ISBN-10: 0262611465
• ISBN-13: 978-0262611466
• Product Dimensions: 9.3 x 5.9 x 0.5 inches
• Shipping Weight: 1.1 pounds (View shipping rates and policies)
• Average Customer Review: 4.3 out of 5 stars  See all reviews (32 customer reviews)
• Amazon.com Sales Rank: #88,181 in Books (See Bestsellers in Books)

Customer Reviews

Most Helpful Customer Reviews

122 of 125 people found the following review helpful:

5.0 out of 5 stars Required Reading, December 1, 2001

By	Mark Wieczorek (Brooklyn, NY United States) - See all my reviews

Traditional decision making models, according to Gary Klein, are built in academia, studied in labs where the circumstances are carefully controlled, and the test subject unfamiliar with the material. Decision making in the real world is something altogether different.

According to traditional decision making models, first you gather data, then you compile and compare options and decide on a course of action. Studying fire commanders, officers in the military, chess players, and many others in high pressured decision making positions, Klein came to the conclusion that you are more likely to come up with one course of action, run through it mentally to look for flaws. If you don't find any flaws in your model, you act on it, if you do find flaws, you do come up with another possible course of action, but you never compare two options, weighing the pros and cons of each. You simply don't have the time or energy.

Time pressure doesn't just apply to fire commanders and military leaders. It seems that this model holds up to people working under a deadlines that are weeks or months away as well.

Klein calls this the "Recognition Primed" decision making model (RPD). In essence, you compare quickly (and often unconsciously) the situation you're in with a sort of master story of previous situations you've been in. You can then recognize features that are analagous to, or different from, these earlier experiences, allowing you to form accurate mental models and intuit courses of action.

Because of this, experience is extremely important in the decision makin process. If you do not have past experience to draw from, you are more likely to fall back on the traditional decision making models - gathering data and options and weighing them. The more experienced you are, the more clearly you can see a situation for what it is and act quickly. Therefore, training should be geared not towards imparting knowledge, but towards bringing people up to speed and imparting experience. Storytelling as a great way to pass on experience, drills and simulations are also valuable.

In chapter 13, where most books are winding down and getting repetitive, Klein describes "considerations for communicating intent." This chapter, entitled The Power to Read Minds, Klein tells us that giving a laundry list of instructions can be detrimental. It is important that we communicate intent. What we want, why we want it, what considerations we took into account in coming to these conclusions, an image of the desired end state, important decision points and possible obstacles along the way. There's another point or two, but I don't recall offhand.

It may seem obvious, but if these things haven't been clearly communicated, each person will have their own interpretation of their instructions, or even worse, have no understanding of the situation and goals at all and be unable to act if unexpected circumstances should arise. If you clearly communicate intent, people should be able to improvise to get to the end state rather than being stuck trying to figure out your intent based on your instructions. It's a real time saver too because you don't have to think of every contingency and plan for it. You simply have to ensure everyone understands your intent.

This chapter has been especially helpful to me. In the week or so since I've read it, I've used it to speed up meetings, ensuring that everyone is on the same page and has the same understanding of the situation. I've also used it to put together formal proposals, ensuring the client gets what they want.

In a meeting recently, when I saw that everyone was coming up with ideas that conflicted with each other, I asked the meeting leader (in different words) "what is it you're trying to accomplish? what is the end state you envision? what obstacles do you see to us getting there?" Things she had surely taken into consideration, but had not communicated clearly to us.

While everyone else was weighing the options she laid out, stuck on "following instructions," I proposed something she hadn't though of. It was in line with her goals and within the constraints we were given, but not one of the options she thought of, and unlike anything we'd done before. Because I understood the situation clearly I was able to think "outside the box" to come up with a solution. She loved my proposal and the focus of the meeting changed immediately to methods for putting my plan into action.

Reading this lucid and intelligent account of the "Recognition Primed" decision making model lays a good groundwork for decision making, and we all make decisions. It doesn't try to tell you how to make decisions, it simply describes how they are made. Beyond just decision making, the chapters for communcating intent, and the team mind have been real eye openers as well. Each chapter has something to offer, and while the book builds on itself, once you've read it, you can (and will) jump around and re-read chapters or sections that are important to you. A well labelled table of contents and index are included to quickly help you find information.

I found it highly readable, well put together, and extremely insightful. Though the tools it gives me lay more in the experience of reading it than the information imparted, I find myself quoting this book constantly, or referring back to it. I'm tempted to buy a second copy for my home (I keep my copy on my office bookshelf). I recommend it to everyone who takes an interest in learning about decision making in the real world.

32 of 33 people found the following review helpful:

5.0 out of 5 stars Truly thinking out-of-the-box, HIGHLY RECOMMENDED, April 13, 2001

By	Amrit Tiwana "www.bus.iastate.edu/tiwana" (Decatur, Georgia, USA) - See all my reviews (REAL NAME)

This is an excellent book on decision making. I borrowed a copy at my library. Once I started reading it, I realized that this actually belonged to an serious business reader's bookshelf. I went out and bought a copy. There are several features that make this book a must-have: 1. The author's tlk about decision making under high pressure 2. Time, as in real life, is at premium 3. There is often little opportunity to do detailed analysis as our graduate school textbooks showed us. 4. There is a lot more to decisions than rational choice models.

This book takes all this into account. The authors present a coherent argument. The book's logical organization makes thier points easy to grasp. This book will be of value to both managers and researchers. Unlike many other books on decison making, this one is based on rigirous research spannig many years---not one guy's opinions. Buy it, highlight it, dog-ear it, and absorb it. Sources of Power is truly an excellent source of power about a new, integrative way of thinking. EXCELLENT READ.

33 of 35 people found the following review helpful:

5.0 out of 5 stars A Fundamentally Different Way to See Decision Making, May 20, 2001

By	Cask05 "Cask05" (Texas USA) - See all my reviews

After a year has passed since having read this book and since also having delved into QFD, AHP, MAUT, heuristics and biases (Kahneman, Slovic & Tversky),etc., I've had the opportunity to generate a decision methodologies course. I came back to this material as a central theme for the course. Why? Because, in practice, traditional decision support methodologies (mentioned above) usually fail to reach their goal - which is to take real people and get them to make better decisions. Sources of Power provides a framework for understanding about how real people make decisions - novices, journeymen and experts - and how they differ. Because the Klein Associates' Recognition-Primed Decision model (RPD) begins to explain expertise's properties, some surprising things fall out: experts typically do not weigh alternatives in trade-study fashion. Experts must be able to see the context of the raw data, not just processed data. Now we can understand the limitations of collaboration tools as "the answer" for integrated product development. Expertise must be supported, not IT-based solutions. This leads to totally different thinking about how to train people to make better decisions and not just in time-critical domains.

With the insights related above, this opens some doors to new ways of understanding why other techniques fail. When formulating a decision problem, the goal must be carefully formulated. Sources of Power will subtly change your approach. Without this understanding of decision support methods, your chances of solving the wrong problem go up exponentially: when you remove expertise from the difficult problem-solving domain, no decision method can save you.

Note that multi-attribute problems still need methodology support: problems comparing "apples, oranges & bananas". See Robyn Dawes' "The Robust Beauty of Improper Linear Models" from "Judgment Under Uncertainty: Heuristics and Biases".

What do you do in a group decision-making environment? Delphi? QFD? AHP? MAUT? Once your emphasis changes from "canned" decision-support approaches to context-sensitive approaches then your entire perspective changes. The combination of domain expertise and the other decision support methods forms a new path.

But how do you combine these methods? Sources of Power doesn't provide you a canned answer but it definitely provides you a path - a necessary one for understanding and improving successful decision making.

Tell your colleagues about this book, and let them form their own (expert) opinion.