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 different from one another, however, the difference between

 blocks 1 (mean=9.66, sd=13.07) and block 2 (mean=5.84,

 sd=11.64) approached significance [T(1,46) = 2.727, P =

 .009]. Block 3 (mean=6.17, sd=12.76) and Block 4

 (mean=6.86, sd=14.82) were not significantly different from

 each other or Blocks 1 and 2. A table of these t-tests,

 Table C-46, is presented in Appendix C.

 To examine the block by condition interaction, four

 paired t-tests were used with a Bonferroni correction

 requiring a P < .0125 to compare the reward and control

 tones for each block. Results revealed that at block 1, SCR

 was significantly greater [T(1,46) = 3.172, P < .01]

 following the no-reward tone (mean=12.50, sd=14.28) than

 following the reward tone (mean=6.82, sd=11.19). There were

 no significant differences between the reward and no-reward

 conditions for the remaining blocks (block 2: mean of no-

 reward=5.32, sd=10.82; mean of reward=6.36, sd=12.50, block

 3: mean of no-reward=5.16, sd=11.62; mean of reward=7.18,

 sd=13.86, and block 4 mean of no-reward=6.79, sd=13.11; mean

 of reward=6.93, sd=16.50). The results of the t-tests are

 presented in Table C-47 in Appendix C.

 The SCR magnitude was also examined using logarithmic

transformations. Using the same design, the results were

unchanged from the findings obtained using the

nontransformed data.


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