If you were investigating mental alertness when exposed to prolonged periods of sleep deprivation, what would be the most appropriate contrast to use if you were interested in the reduction in alertness from hour to hour (e.g. 1 vs. 2 h, 2 vs. 3 h, 3 vs. 4 h, etc.)?
A) Repeated
B) Simple
C) Helmert
D) Deviation

Question

Quizplus · Accepted Answer

Repeated contrasts are used to compare each level of a factor to the next level, which is suitable for examining changes from hour to hour in alertness.

If You Were Investigating Mental Alertness When Exposed to Prolonged