Planning and conducting research：练习题

Which of the following describes a directional (one-tailed) hypothesis?

A researcher is studying the effects of sleep deprivation on coordination. They test the same group of 20 participants on a motor task after 8 hours of sleep and then again after 24 hours of no sleep. What is a major weakness of this experimental design?

When conducting an observation, a researcher decides to record behavior every 30 seconds for a 10-minute period. This is an example of:

In psychological research, what is meant by the term alternative hypothesis?

Explain the concept of falsification as a principle of scientific enquiry in psychology.

Explain how a psychologist would operationalise the independent and dependent variables in a study investigating the effect of noise on memory recall.

Explain the difference between a null hypothesis and an alternative hypothesis. Use an example from a study into the effects of sleep deprivation on memory to illustrate your answer. [3]

A psychologist wants to investigate whether there is a correlation between the amount of time spent on social media and levels of self-reported anxiety in adolescents.

(a) Suggest an appropriate sampling technique for this study and justify your choice. [2]

(b) Explain how the researcher could operationalise the variable 'anxiety' using a self-report method. [2]

(c) Discuss two ethical issues the researcher must consider when conducting this research with adolescents. [3]