Barely Significant

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highly significantp < .0010.0× alphaqualifiedgold
However, we observed a highly significant difference in the duration of the experiment after controlling for age (ANCOVA: F(2,89) = 9.489, p < .001, mean 2-AFC = 206.20 sec, mean 4-AFC = 135.37 sec, Fig 8 ), indicating completing 30 trials in a 4-AFC task takes considerably less time than completing 60 trials in a 2-AFC task even though the average trial duration in the 4-AFC was significantly longer than in the 2-AFC experiment (mean 2-AFC = 3.44 sec, mean 4-AFC = 4.51 sec, ANCOVA: F(2,89) = 4.682, p = .01).
highly significantp<.0010.0× alphaqualifiedgold
Results Manipulation Check When comparing the percentage of REM sleep across the two nights for each experimental group we found a highly significant decrease of REM sleep from 11.9%±1.2 (mean ±SEM; adaptation night) to 1.4%±.4 (experimental night) in the REM deprivation group (p<.001; paired t-test) and a slight increase in the undisturbed sleep group (12.4%±1.2 and 15.7%±1.4; p = .07).