A two-state model of simple reaction time

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one 1.00, one 1.30, one 1.69, three 2.19, one 2.84 and three
3.69 sec FPs. That is, in set Sw, shorter FPs were weighted
and, in set Lw, longer FPs weighted» In a block, 102 FPs were
used. The first two FPs were 2.00 sec. The other 100 FPs were
consisted of a randomized sequence of ten set Sw's or ten
set Lw.'s. In order to investigate contextual effects on RT
under a within-subject design, the following two conditions were
prepared. In the S-L condition, FPs used in the first session
belonged to set Sw, and FPs in the second session to set Lw.
In the L-S condition, FPs used in session 1 belonged to set Lw
and FPs in session 2 to set Sw. Three subjects (subject 7,8
and 9) were tested under the S-L condition, and the other three
(subjects 10,11 and 12) under the L-S condition. Total times of
experiment II were between 120 and 140 minutes.
The programs which were used in experiment II are given in
appendix B.
RESULTS