Each of the two authors recently attempted to replicate studies in whi
ch the ''receivers'' were asked to psychically detect the gaze directe
d at them by unseen ''senders.'' R. W.'s studies failed to find any si
gnificant effects; M. S.'s study gave positive results. The authors th
en agreed to carry out the joint study described in this paper, in the
hope of determining why they had originally obtained such different r
esults. The experimental design was based on each author carrying out
separate experiments, but running them in the same location, using the
same equipment/procedures, and drawing participants from the same sub
ject pool. The 32 experimental sessions were divided into two sets of
randomly ordered trials. Half were ''stare'' trials during which the e
xperimenter directed his/her attention toward the receiver; half were
''non-stare'' (control) trials during which the experimenter directed
his/her attention away from the receiver. The receivers' electrodermal
activity (EDA) was continuously recorded throughout each session. The
EDA of R. W.'s receivers was not significantly different during stare
and non-stare trials. By contrast, the EDA of M. S.'s receivers was s
ignificantly higher in stare than non-stare trials. The paper discusse
s the likelihood of different interpretations of this effect and urges
other psi proponents and skeptics: to run similar joint studies.