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Du är här: Hem / Notiser / Notis 204 – ”The strength if evidence versus the power of belief: Are we all Bayesians? ”

Notis 204 – ”The strength if evidence versus the power of belief: Are we all Bayesians? ”

2012-01-01 av spf

Notis 204, 2012-01-03.  Här följer ett föredrag med Jessica Utts på tema ”The strength if evidence versus the power of belief: Are we all Bayesians? Hon är professor i statistik University of California, Irvine, och redogör för olika statistiska metoder att analysera data om telepati, varav ett sätt, Bayesian statistik, särskilt tar hänsyn till prior belief. Hon har konstaterat att skeptiker ofta struntar i de resultat man får fram. Deras egen övertygelse är ofta viktigare! One of the appealing aspects of Bayesian statistics is that the methods allow prior beliefs and expert knowledge to be incorporated into the analysis along with the data, en omständighet som särskilt gäller parapsykologi.

Although statisticians have the job of making conclusions based on data, for many questions in science and society prior beliefs are strong and may take precedence over data when people make decisions. For other questions, there are experts who could shed light on the situation that may not be captured with available data. One of the appealing aspects of Bayesian statistics is that the methods allow prior beliefs and expert knowledge to be incorporated into the analysis along with the data. One domain where beliefs are almost sure to have a role is in the evaluation of scientific data for extrasensory perception (ESP). Experiments to test ESP often are binomial, and they have a clear null hypothesis, so they are an excellent way to illustrate hypothesis testing. Incorporating beliefs makes them an excellent example for the use of Bayesian analysis as well. In this paper, data from one type of ESP study are analyzed using both frequentist and Bayesian methods

www.echonyc.com/~horn/unbelievable/?p=2424

I came across this lecture given last year by statistician Jessica Utts (Department of Statistics, University of California, Irvine) titled: The strength of evidence versus the power of belief: Are we all Bayesians?

From the description on the page for this lecture:

“Although statisticians have the job of making conclusions based on data, for many questions in science and society prior beliefs are strong and may take precedence over data when people make decisions. For other questions, there are experts who could shed light on the situation that may not be captured with available data. One of the appealing aspects of Bayesian statistics is that the methods allow prior beliefs and expert knowledge to be incorporated into the analysis along with the data.

“One domain where beliefs are almost sure to have a role is in the evaluation of scientific data for extrasensory perception (ESP). Experiments to test ESP often are binomial, and they have a clear null hypothesis, so they are an excellent way to illustrate hypothesis testing. Incorporating beliefs makes them an excellent example for the use of Bayesian analysis as well. In this paper, data from one type of ESP study are analyzed using both frequentist and Bayesian methods.”

From that description it sounded kinda scary and that the lecture would go over my head, but I’m listening to it now and I’m able to follow it. Utts is explaining everything very simply and clearly—I have to believe she’s speaking with the idea that people like myself might be in the audience.

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