Identifying Experimental Research Design

Very Hard Unit 1: Scientific Foundations Research Methods

Researchers are conducting a study to investigate the impact of sleep deprivation on cognitive performance. They randomly assign participants to one of two groups: one group is allowed to sleep normally (8 hours) and the other group is kept awake for 24 hours. Afterward, both groups undergo a series of cognitive tasks assessing memory and problem-solving abilities. Which of the following statements best describes the type of research design used in this study?

A case study that examines the effects of sleep on cognition over time.

A correlational study that investigates the relationship between sleep and cognitive scores.

A longitudinal study that tracks sleep patterns and cognitive changes in participants.

An experimental study that manipulates sleep duration to observe its effects on cognition.

A qualitative study that analyzes interviews regarding personal sleep habits and perceived cognitive functioning.

Hint

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