In a test of the effects of sleep deprivation on problem-solving skills,research participants are allowed to sleep either 4 or 8 hours on each of three consecutive nights. This research is an example of

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This is an experiment because the researchers are manipulating the independent variable (amount of sleep) and measuring the effects on the dependent variable (problem-solving skills). The participants are also randomly assigned to either the 4 or 8-hour sleep condition, which is a key characteristic of experiments.

In a Test of the Effects of Sleep Deprivation on Problem-Solving