Dr. Aris conducted an investigation to determine whether listening to a cognitive-behavioral therapy (CBT) podcast before bed improved sleep quality in night-shift nurses. Dr. Aris utilized a volunteer sampling technique by sending an email invitation to the staff mailing list of a major city hospital to recruit participants.
Half of the participants listened to a 15-minute CBT sleep podcast before sleeping (Condition A), while the other half listened to a 15-minute white noise audio track (Condition B). After three weeks, all participants recorded their sleep quality using a standardized self-report sleep quality index.
Explain one strength and one weakness of the sampling technique used by Dr. Aris in his investigation.
638 exam-style questions on Edexcel A Level Psychology Methods. Each one has a worked solution and a mark scheme showing where the marks go.