Find out more about Calculated Risks by Gerd Gigerenzer at Simon & Schuster. Read book reviews & excerpts, watch author videos & more. Cognitive scientist Gerd Gigerenzer says that because we haven’t learned statistical thinking, we don’t understand risk and uncertainty. In order to assess risk. 1 Jan Gerd Gigerenzer, Simon and Schuster, New York, pp., ISBN (the book examines several) requires people to calculate the risk that is.

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Really enjoyed this book, but some chapters were better than others.

Yet many people will have to make important health decisions based on such information and the interpretation of that information by their doctors. This books gives some good advice for the layman on how to correctly interpret the information. His language was precise and unambiguous, without being filled with unnecessary jargon.

In number needed to treat: A critic of the work of Daniel Kahneman and Amos Tversky, he argues egrd heuristics should not lead us to conceive of human thinking as riddled with irrational cognitive biases, but rather to conceive rationality as an adaptive tool that is not identical to the rules of formal logic or the probability calculus. What risk, you might ask, is there for an asymptommatic woman in having a mammogram? People have actually gone to prison and been put to death over this kind of thing.

For example, it is said that a mammography screening reduces the risk of breast cancer by 25 percent. These topics should be mandatory in school curricula- brings to gkgerenzer Art Benjamin’s talk about the over-emphasis on calculus at the expense of stats: Basically it gigernzer you to fully grasp the concept of uncertainty in situations, and convey it to other rikss in a way that doesn’t distort any of the important stuff.

Many of us believe that HIV gfrd, DNA fingerprinting, and the growing number of genetic tests are absolutely certain. To avoid confusion, says Gigerenzer, we should rely on more understandable riwks of risk, such as absolute risks. When you hear quotes from prosecutors such as ‘there is a one-in-a-million chance that someone else besides this suspect committed the crime,’ they’re getting their statements badly wrong.

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The author has done studies about cognition, and finds that people are better able to calculaated and correctly apply Bayes’ rule when If you are in a good mood, you might even remember it’s called Bayes law. Goodreads helps you keep track of books you want to read. But if the reason for the false positive is some biological feature- the person’s blood proteins are unusual and cannot be detected correctly by the testing chemicals, or something, then performing more tests will not necessarily clear things up.

The two conditional factors are placed the other way around. Apparently, GPs and surgeons are not as numerate as you would hope, so that makes me feel better or not, if in their hands.

Last year, a middle-age woman I know presented a suspicious calcluated during routine breast cancer screening. I used to believe, but the author shook my firm believe in this. Even professionals doctors, people in the legal system, social workers get confused between different kinds of probabilities.

But even DNA evidence can produce spurious matches. A 25 percent risk reduction sounds much more significant than a benefit that 1 out of 1, women will reap. May 11, Kris Fabick rated it liked it. In order to assess risk — everything from the risk of an automobile accident risls the certainty or uncertainty of some common medical screening tests — we need a basic understanding of statistics.

However, I felt first few chapters rissk delivered most of the message and the rest of the book was repeating berd same story again and again; it could’ve been written more concisely with better organization, but maybe the author wanted to dumb down as much as possible as his main purpose of writing this book is to educate the general public.

For example, imagine that out of 10, people who are tested for HIV, 1 is infected, and this individual will test positive with almost absolute certainty. The book gigefenzer out a number of stunning examples in which mispresentation of risks caused unfortunately sad ending: But this book, this book does a magic. Other math books reference this book.


Calculated Risks: How to know when numbers deceive you: Gerd Gigerenzer – William M. Briggs

Thanks for telling us about the problem. The delivery is likely to stick with readers better, giving them a calculatsd chance of actually using the knowledge for critical evaluation of future situations. People have had breasts removed on the basis of faulty screening that they were enticed into receiving given the impressively high but mostly irrelevant measure of relative, versus absolute, risk reduction.

About everyday situations which require people to make decisions based on statistics, and the way those statistics are badly misunderstood and miscommunicated. Astonishingly, doctors and lawyers don’t understand risk any better gierenzer anyone else. Wells predicted that statistical thinking would be as necessary for citizenship in a technological world as the ability to read and write. The surprising answer, according to this wonderful new book by psychology professor Gerd Gigerenzer, is, at least for most women, probably not.

But even DNA evidence can produce spurious matches. His preferred reporting method is “natural frequencies”. Her relief at a normal test result was then partially spoiled by her doctor’s ready desire to place her into a more intensive future screening program possibly with an even lower threshold for action that could be unnecessary.

Despite regarding my maths skill above the average, I didn’t know how to deal with the false positive and negative rates.

Calculated Risks: How to Know When Numbers Deceive You

Many of us believe that HIV tests, DNA fingerprinting, and the growing number of genetic tests are absolutely certain. Cognitive scientis At the beginning of the twentieth century, H. Many of you might remember having learned how to “solve” this kind of problem.

Lists with This Book.