Scientific Methods Quiz — A-Level Psychology

Question 1

A researcher is investigating the effectiveness of a new mindfulness-based stress reduction (MBSR) program on reducing perceived stress levels in adults. Participants are randomly assigned to either the MBSR group or a control group that receives a relaxation audio. The researcher measures perceived stress using a validated questionnaire before and after the 8-week program. Which of the following statistical tests would be most appropriate to analyze the data and determine if there is a significant difference in stress reduction between the two groups?

Question 2

In a study examining the impact of different types of feedback on learning, researchers randomly assign students to one of three conditions: positive feedback, constructive feedback, or no feedback. After a learning task, their performance is measured by the score on a subsequent test. Which of the following best describes the independent variable and its levels in this experiment?

Question 3

A psychologist is conducting a longitudinal study to investigate the development of social anxiety from adolescence to early adulthood. The researcher collects data from the same group of participants every two years over a 10-year period. Which of the following is a primary strength of this research design compared to a cross-sectional study?

Question 4

A research team is developing a new questionnaire to assess 'emotional intelligence'. They administer the questionnaire to a large sample of adults. To establish the questionnaire's concurrent validity, they also administer a well-established and validated emotional intelligence test to the same sample at the same time. They then correlate the scores from their new questionnaire with the scores from the established test. Which of the following correlation coefficients would provide the strongest evidence for good concurrent validity?

Question 5

In a study investigating the effect of a new memory enhancement technique, participants are randomly assigned to either the experimental group (receiving the technique) or a control group (receiving no intervention). After the intervention, memory recall is measured by the number of words correctly remembered from a list. The researchers calculate a mean of $15$ words for the experimental group and $10$ words for the control group. A statistical analysis yields a p-value of $0.03$. Assuming a significance level (alpha) of $0.05$, what is the most appropriate conclusion?

Scientific Methods — Quiz

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