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August 24th, 2010

What is Stakes-Sensitive?

There was a fair bit of back and forth in the previous thread on just what us stakes-sensitive folks were claiming to be stakes-sensitive. So I thought I’d list what I thought was stakes-sensitive, and perhaps others who thought there is stakes-sensitivity somewhere can chime in either in comments or on their blogs/sites.

Three qualifications before I start.

First, I’m really interested in odds-sensitivity, not stakes-sensitivity. I think you get some stakes-sensitivity effects when you have to decide whether to bet $20 against a few seconds work. For instance, you might double check on your phone something we’d ordinarily say you knew, because the act of checking has a positive expected return. I think that’s a case of long odds defeating knowledge. That doesn’t mean I think of losing $20 as a high stakes situation of course.

Second, I’m primarily interested in the way in which various things are constitutively dependent on stakes. If the stakes raise, then I collect more evidence, and then my credence/belief/knowledge/evidence changes, that doesn’t in itself mean the kind of sensitivity at issue here is displayed. I also think that ‘thinking through’ a question is often a way of collecting more logical/mathematical/epistemological evidence. So this kind of causal dependency of belief etc on stakes is not what’s at issue here, but is surely a central feature of our epistemic life. Any theory that said that for ordinary humans, stakes raising doesn’t have a causal impact on how much we collect and think through evidence is surely too absurd to be taken seriously.

Third, it’s very important to distinguish various ways in which beliefs can be strong. There are plenty of pairs of propositions p, q such that:

Here’s one instance of that. Let p be that in the weekend’s election, the seat of La Trobe was won by a college friend of mine, and q be that this particular lottery ticket will lose.

This means that phrases like ‘degree/strength of belief/confidence/credence’, are systematically ambiguous. By ‘credence’ I mean the state that bears a close relationship to betting behaviour, and by ‘belief’ I mean the state such that someone who believes p takes p for granted when making theoretical or practical decisions.

Having said that, here’s what I think is stakes-sensitive.

In my original paper on pragmatic encroachment I hinted that the last claim is false. But I’ve changed my mind. I think that in cases where the agent is wrong about what the stakes are, or even have mistaken credences about stakes, knowledge can be affected by stakes even fixing everything else. Those cases are rare, and haven’t been much discussed in the literature. (They certainly haven’t been tested in any experiments.) But I think they are important for getting the details of stakes-sensitivity right.

Posted by Brian Weatherson in Uncategorized

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One Response to “What is Stakes-Sensitive?”

  1. angel pinillos says:

    HI Brian,
    On your very last point about knowledge being stake sensitive (fixing belief), I just posted some experimental results on the experimental philosophy blog in support of that claim (if I am understanding your idea correctly). In the experiment, I provide subjects with one of two vignettes (High and Low stakes). In the vignettes, Peter is a student who finished a paper for a class and is contemplating checking it for typos. In the HIGH case, there is a lot at stake if there is but a single typo. In the LOW case there isn’t much at stake. I then ask the participants:

    “It turns out that right after Peter finished writing his paper, he formed the belief that there are no typos in his paper—and in fact there are no typos. But does he know this? How many times do you think that Peter has to proofread his paper before he knows there are no typos? ___ times.”

    Answers in the LOW case are lower than in the HIGH case (highly stat sig). So knowledge attributions are sensitive to stakes—fixing beliefs. Is this the sort of data that you have in mind?

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