1/24/13

false positive 2

I said before that I have some confusion about True Positives and False Negatives and such. I think I finally identified my confusion.

This is what I often think is going on:


"True" answers the question: is this dot red?
"Positive" answers the question: did the test say the dot was red?

But I'm wrong.

Here is what "True" actually refers to:


That is, "True" answers the question: did the test say the correct thing about the dot?

I think a less confusing word would be "Correct" or "Accurate", as in Correct-Positive: a positive result that is correct.

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