41. Tess agrees to sleep in an artificial setting for three nights so that researchers can obtain information about her brain and muscle activity during sleep. She is taking part in a research method called a. a single-blind study b. a double-blind study c. naturalistic observation d. laboratory observation Section: Descriptive Studies: Establishing the Facts Page(s): 41 Type: Applied Answer: d Level of Difficulty: Moderate LO 2.5: Discuss the advantages and disadvantages of using case studies and observational f d