Reader Comments

Post a new comment on this article

Calculation of d-prime

Posted by mkarim on 06 Jun 2012 at 09:34 GMT

For accuracy, D-prime (d′) was used. d′ is a measure of sensitivity that takes subjects’ response bias into account and is calculated as follows:
http://plosone.org/article/info:doi/10.1371/journal.pone.0037580#article1.body1.sec4.sec2.p2

Due to a conversion error, the equation appeared incorrectly. It should be:

"'d' = [z(H) - z(F)] / square-root(2)"'.

I assure you, this correct formula will produce less tears.

No competing interests declared.