Tuesday, May 02, 2006

Errata

A sharp-eyed reader found a mistake in a figure caption in Entangled Minds. The caption for Figure 3-1 had the genders reversed. The caption should read: "Average responses to questions about belief in unusual experiences, for women (black squares) and men (white diamonds), with error bars indicating the likely range of the 'true' average value."

4 comments:

Spooks said...

oops! I hate when that happens...

Anonymous said...

Hi!

I've got a question on the funnel plots.
When I look at the dream psi meta-analysis in your book, all individual studies have positive hit rates (allthough four of the earliest ones are not significant).

What I don't understand is how a funnel plot can show negative effect sizes for studies that have positive hit rates?

This probably just shows my incomplete understanding of effect sizes. Up to now I thought that positive hit rates had to correspond to positive effect sizes. How do I interpret an negative effect size?

-Tor

Dean Radin said...

Figure 6-1 is a cumulative plot of the hit rate, and not a plot of each individual study's results. The dots on the funnel plot (Figure 6-2) show the results of each study separately.

Anonymous said...

Aha.. Thanks!
I must have read "cumulative" in the caption about 10 times, but still I didn't "see" it. Preconceived ideas die hard..

-Tor