It Is Late at Night,and David Is Studying for an Exam.David

question 98

Multiple Choice

It is late at night,and David is studying for an exam.David looks up and sees his older brother Jeff standing in his doorway.David speaks to him but gets no response.Jeff's eyes are open but he has a blank expression on his face,and Jeff shuffles his feet rather than walking normally.David follows him back to his room,and Jeff gets back into bed.David has just witnessed an episode of

• A) narcolepsy.
• B) somnambulism.
• C) REM behavior disorder.
• D) sleep terror disorder.

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Definitions:

Aggregation

The process of combining multiple pieces or data points together to form a whole or summary measure.

Incremental Validation

A process of progressively verifying the steps or components of a model, system, or theory to ensure its accuracy or validity at each stage.

Null-hypothesis Significance Testing

A statistical method used to determine if there is enough evidence in a sample of data to infer that a certain condition holds true for the entire population.

P-value

A statistical measure that helps scientists determine the strength of their evidence; it indicates the probability of observing their data, or something more extreme, if the null hypothesis were true.