When in doubt, mark it?
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Which is better -- a false positive or a false negative? If we can't tell if something is a penguin or a rock, do you want us to mark it?
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I mean in general -- not this image in particular. (I'm still learning to navigate your site.)
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by
yshish
moderator, translator
in response to MonarchRaiser's comment.
It depends on the circumstances but in general, I would use these rules (not confirmed by the scientists yet!):
1] When you get an image where you cannot see any clear animals but something that can be an animal as well as a rock, then choose the 'I can't tell' button when being asked whether there are any animals present.
2] When you get an image with more than 30 penguins present and there are some unidentified objects which can be penguins/other animals as well as rocks.. then I wouldn't mark them but chose the 'Too many to count' button to let the scientists know there can be more of them.
3] When there's an image with less than 30 penguins and some objects which can be animals as well as penguins then I wouldn't mark the unsure objects but clicked on the 'Too many to count' button too.
4] When you are sure it is an animal but not sure whether a penguin or some other animal, then I would chose the Other button and marked it as some of the listed BIRDS (not humans nor buildings).
5] When there's a penguin for sure but you can't tell whether an adult or chick, then choose the adult one. So the scientists will get at least their count.
For all these rules I have to say, that it depends on each specific image - sometimes I'm almost sure it is a penguin (rather than a rock) but not sure, then it is better to mark it as a penguin than leave it unmarked. But when it is 50:50, then I wouldn't mark it.
Hope this information isn't misleading. will ask the scientists for a confirmation (They could disagree and prefer guessing:). And always remember that each image is classified by multiple users so all the mistakes should get excluded from the results:] Just try your best and ask questions when in doubts!
Thanks for the question. Enjoy the counting,
Zuzi
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