Keiran conducted an investigation into whether a structured 15-minute lunchtime power-nap improves afternoon cognitive performance in corporate financial analysts. Keiran used a volunteer sampling technique, sending an email invitation to all analysts in a multinational bank's regional headquarters asking for participants.
Half the participants were instructed to take a 15-minute power-nap in a designated quiet room at 1:00 PM (Condition A), while the other half continued with their usual 15-minute desk break (Condition B). After two weeks, all participants completed a standardized rapid-decision-making cognitive assessment.
Explain one strength and one weakness of the sampling technique used by Keiran in his investigation on the effects of power-napping.
Practise Edexcel A Level Psychology Methods with exam-style questions for A Level Psychology. 638 questions, matched to the Edexcel A Level Psychology (9PS0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.