Selected answers are available in Sect. D.8.
Among USC students, is the taste of tap water different than the taste of bottled water?
You want to answer this question using an observational study. Describe what these might look like for this study:
- Random allocation.
- Double blinding.
- Finding a random sample.
Exercise 8.4 A study of how well hospital patients sleep at night (Delaney et al. 2018) had the stated aim ‘to investigate the perceived duration and quality of patient sleep […] in hospital.’ In discussing the limitations of the study, the researchers state:
Discuss these limitations in terms of the language used in this chapter.
The researchers made no attempt to deceive clinical staff regarding the nature of the study so the influence of the Hawthorne Effect should be considered. The presence of the observer and environmental monitoring equipment in the clinical environment could have altered behaviour among patients and nursing staff seeking to conform to the presumed research objectives. As a result, the findings reported may be an underestimation of the magnitude of the issues that affect sleep.