Conversation so far:
Who first tested Eileen J. Garrett's abilities?
Eileen J. Garrett took part in clairvoyance tests. One of the tests was organized by Joseph Rhine at Duke University in 1933 which involved Zener cards.
Describe Eileen J. Garrett's clairvoyance test.
In Eileen J. Garrett's clairvoyance test, certain symbols were placed on cards and sealed in an envelope, and participants were asked to guess their contents.

Question: What were the results of the test?
Self-contained rewrite: What were the results of Eileen J. Garrett's clairvoyance test?