If You Were Investigating Mental Alertness When Exposed to Prolonged

Multiple Choice

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