MrHen comments on The Sin of Underconfidence - Less Wrong

55 Post author: Eliezer_Yudkowsky 20 April 2009 06:30AM

You are viewing a comment permalink. View the original post to see all comments and the full post content.

Comments (176)

You are viewing a single comment's thread. Show more comments above.

Comment author: mattnewport 20 April 2009 10:39:47PM 2 points [-]

Overconfidence and underconfidence both imply a non-optimal amount of confidence. It's a little oxymoronic to claim that underconfidence is an excellent strategy - if it's an excellent strategy then it's presumably not underconfidence. I assume what you are actually claiming is that in general most people would get better results by being less confident than they are? Or are you claiming that relative to accurate judgements of probability of success it is better to consistently under rather than over estimate?

You claim that overconfidence is usually costlier than underconfidence. There are situations where overconfidence has potentially very high cost (overconfidently thinking you can safely overtake on a blind bend perhaps) but in many situations the costs of failure are not as severe as people tend to imagine. Overconfidence (in the sense of estimating greater probability of success than is accurate) can usefully compensate for over estimating the cost of failure in my experience.

You seem to have a pattern of responding to posts with unsupported statements that appear designed more to antagonize than to add useful information to the conversation.

Comment author: MrHen 20 April 2009 11:06:04PM 0 points [-]

I am replying here instead of higher because I agree with mattnewport, but this is addressed to Annoyance. It is hard to for me to understand what you mean by your post because the links are invisible and I did not instinctively fill them in correctly.

Overconfidence is usually costlier than underconfidence.

As best as I can tell, this is situational. I think mattnewport's response is accurate. More on this below.

The cost to become completely accurate is often greater than the benefit of being slightly-inaccurate-but-close-enough.

It seems that the two paths from this statement are to stay inaccurate or start getting more efficient at optimizing your accuracy. It sounds too similar to saying, "It is too hard. I give up," for me to automatically choose inaccuracy. I want to know why it is so hard to become more accurate.

It also seems situational in the sense that it is not always, just often. This is relevant below.

When these two principles are taken into account, underconfidence becomes an excellent strategy.

In addition to mattnewport's comment about underconfidence implying non-optimal confidence, I think that building this statement on two situational principles is dangerous. Filling out the (situational) blanks leads to this statement:

If underconfidence is less costly than overconfidence and the cost of becoming more accurate is more than the benefit of being more accurate than stay underconfident.

This seems to work just as well as saying this:

If overconfidence is less costly than underconfidence and the cost of becoming more accurate is more than the benefit of being more accurate than stay overconfident.

Which can really be generalized to this:

If it costs more to change your confidence than the resulting benefit, do not change.

Which just leads us back to mattnewport's comment about optimal confidence. It also seems like it was not the point you were trying to make, so I assume I made a mistake somewhere. As best as I can tell, it was underemphasizing the two situational claims. As a result, I fully understand the request for more support in that area.

It also leaves potential in reserve in case of emergencies. As being accurately-confident tends to let others know what you can do, it's often desirable to create a false appearance.

Acting overconfident is another form of bluffing. Also, acting one way or the other is a little different than understanding your own limits. How does it help if you bluff yourself?