Subject Demographics
Source of Subjects
Geo. Wash. Univ.
Univ. of Scranton
Internet
Novice (Pre-B.S.)
17
5
5
Expert (B.S. + work)
2
0
16
Distribution into Experiment Groups
Unlinked
Linked/grep
Linked/no grep
Novice
12
8
7
Expert
6
6
6
