PS1107 revision

1)What is the independent variable

• •Vocabulary

• •Age

• •Number of correct responses

• •Age-related changes in vocabulary score

Which would be the most appropriate statistical test?

• •Paired t-test

• •Independent samples t-test

• •Repeated measures ANOVA

• •One-way ANOVA

How could you describe this experiment?

• •True experiment

• •Interrupted time-series design

• •Longitudinal

• •Cross-sectional

Which of the following is a confounding variable?

• •The amount of education that each participant received wasn’t measured

• •Some participants will have had more education than others

• •The older adults have had more years of education than the young adults

• •A person’s education has an effect on their vocabulary

What type of design is this?

• •Between subjects

• •Within subjects

• •Mixed

• •Matched pairs

•Is the assumption of homogeneity of variance met?

• •yes

• •no

• •we need more information

• •homogeneity of variance is not an issue for this type of analysis

•What should Dr Malik do next?

• •Apply a correction

• •Use a non-parametric alternative

• •Conduct post-hoc tests

• •Report the results as they are

Prof Li has run a repeated measures t-test. How should he write up the results in APA format?

• •The paired t-test was non-significant; t(19) = 5.02, p < .001, d = 1.12

• •The paired t-test was non-significant; t = 5.01, p < .001, d = 1.12

• •The paired t-test was significant; t(19) = 5.02, p < .001, d = 1.12

• •The paired t-test was significant; t = 5.01, p < .001, d = 1.12