Stanford COCO Lab

You will watch some horse races and then either bet on the winner of a rematch or give odds for the horses. Should take about 7 minutes. Please pay attention, thanks!

Legal information: By answering the following questions, you are participating in a study being performed by cognitive scientists in the Stanford Department of Psychology. If you have questions about this research, please contact Daniel Hawthorne at or Noah Goodman, at You must be at least 18 years old to participate. Your participation in this research is voluntary. You may decline to answer any or all of the following questions. You may decline further participation, at any time, without adverse consequences. Your anonymity is assured; the researchers who have requested your participation will not receive any personal information about you.

Now you will see some of the results of a series of races from a one on one match-up. You will be asked to report the odds given these results. You will see 5 different match-ups.

Click to see an example of the horse races you are going to bet on. A match-up of two horses run a number of head-to-head races.

The horses run a number of races. We won't waste time watching all of them, but you'll get the results.

Your info # of Races
# of Wins

The Yan Horses are naturally one of two colors:

Of the races that you saw:
How many did win?
How many did win?

Incorrect. Look closely at the results. You will be asked questions about them.

was given the instructions below

bet on with confidence.

Nine other amazon mechanical turk workers in addition to were given the same instructions

They Bet on:

Bet On:

Fill in the race results you think saw

# of Races

I saw races. with confidence

I can always manage to solve difficult problems if I try hard enough

I trust people that I meet.

I am confident that I could deal efficiently with unexpected events.

Do you think had additional knowledge of the races beyond the 10 that he saw?

What additional thing do you think he knew or was thinking?

Did you use the information about (his bets, etc.) when making your judgments about the chance of a horse winning and your confidence in that bet?

Why did you or didn't you use 's bets?

How many races per match-up did you see?

Which best describes ?

Do you think that made any mistakes?

Additional information

Answering these questions is optional, but will help us understand your answers.

Did you read the instructions and do you think you did the HIT correctly?



Level Of Education

Native Language

Did you enjoy the hit?

What do you think believes is the chance that wins the next race?

What do you think is the chance that wins the next race?

Certainly Won't Certainly Will 50/50

How confident are you?

Guessing Certain Reasonably Sure

I saw races. with confidence

Thanks for your Time!
You can click the "Done with Experiment" button

's screen

Guess whether or will win the next race, and win $1 if you are correct. Alternatively, you can not bet and get $.50.

The next amazon mechanical turk worker gets to bet on the next winner. You will get a bonus if they are correct. Should they bet on or ?

Surrey Tyne # of Matches
? ? 5