AO3

• What is one strength of the research into ultradian rhythms by Dement and Kleitman (1958)?

  It was highly controlled
• Why did Dement and Kleitman control alcohol and caffeine consumption?

  To eliminate extraneous variables affecting results
• How were participants monitored during the study?

  With electrodes on their heads
• What is a criticism of the research regarding ecological validity?

  It lacks real-world applicability
• What does mundane realism refer to in the context of this research?

  Artificiality of the task performed
• How does the lack of ecological validity affect the findings of the research?

  It hinders the representation of brain wave activity
• What is the main weakness of the research highlighted in the study material?

  Issues of validity in findings
• In what year was the research by Dement and Kleitman conducted?

  1958