Deck 13: Interventions and Analysis of Change

Question 1

In an RCT if you analyse all participants who were randomised and analyse them in the groups to which they were originally allocated then what sort of analysis have you conducted?

A)A random allocation analysis
B)An intention to treat analysis
C)Analysis of covariance
D)None of the above

Answer 1

An intention to treat analysis

Question 2

Blinding refers to the process of:

A)blindfolding participants in a study
B)concealing information about participant allocation to conditions
C)deceiving participants as to the true purpose of the study
D)all of the above

Answer 2

concealing information about participant allocation to conditions

Question 3

Which of the following could be considered as multiple baseline designs?

A)Multiple single cases which have varying durations for the baseline
B)A single case which has multiple outcome measures
C)A single case which has an outcome measure measured in multiple contexts
D)All of the above

Answer 3

All of the above

Question 4

What sort of design is represented in the figure below?

A)A randomised control trial
B)A blind trial
C)A three period crossover design
D)A systematic review

Question 5

If you introduce double blinding into a study then:

A)your participants and the researchers don't know what they are doing
B)your participants and the researchers do not know to which conditions participants have been allocated
C)your participants are concealed from the researchers
D)your participants are deceived before and after the study

Question 6

In a single case design what would ABAB signify?

A)A baseline phase followed by an intervention phase
B)A baseline phase, followed by an intervention and then a withdrawal phase followed by another intervention phase
C)Two participants each given a baseline followed by an intervention
D)None of the above

Question 7

In an analysis of covariance used for analysing a pre-test / post-test design which variable would you include as the covariate?

A)Pre-test scores
B)Post-test scores
C)The independent variable
D)The dependent variable

Question 8

Which of these are problems associated with AB design single case studies?

A)There may be other factors outside the intervention that are responsible for changes in the outcome variable
B)Participants are not randomly allocated to the conditions
C)They can be difficult to analyse
D)All of the above

Question 9

If you have a dichotomous outcome measure in a repeated measures RCT design what sort of statistical test is most appropriate?

A)t-test on change scores
B)ANVOVA
C)McNemar's test
D)Pearson correlation

Question 10

Which of the following are ways of generating random allocation sequences?

A)Restricted randomisation
B)Simple randomisation
C)Replacement randomisation
D)All of the above