What are the strengths and weaknesses of a repeated measures design?
2. Repeated Measures:
- Pro: As the same participants are used in each condition, participant variables (i.e., individual differences) are reduced.
- Con: There may be order effects.
- Pro: Fewer people are needed as they take part in all conditions (i.e. saves time).
What is the advantage of repeated measures vs between groups designs?
Summary: In user research, between-groups designs reduce learning effects; repeated-measures designs require fewer participants and minimize the random noise.
What is a repeated measure design in psychology?
Repeated measures design is an experimental design where the same participants take part in each condition of the experiment. This means that each condition of the experiment uses the same group of participants.
What is a strength of an independent measures design?
Advantages of independent measures design include less time/money involved than a within subjects design and increased external validity because more participants are used. A disadvantage is that individual differences in participants can sometimes lead to differences in the groups’ results.
What are the weaknesses of repeated measures design?
Repeated measures designs have some disadvantages compared to designs that have independent groups. The biggest drawbacks are known as order effects, and they are caused by exposing the subjects to multiple treatments. Order effects are related to the order that treatments are given but not due to the treatment itself.
What are two advantages to a repeated measures design?
The Benefits of Repeated Measures Designs Fewer subjects: Thanks to the greater statistical power, a repeated measures design can use fewer subjects to detect a desired effect size. Further sample size reductions are possible because each subject is involved with multiple treatments.
Why is it important to use a repeated measures design?
Efficiency—Repeated measure designs allow many experiments to be completed more quickly, as fewer groups need to be trained to complete an entire experiment. For example, experiments in which each condition takes only a few minutes, whereas the training to complete the tasks take as much, if not more time.
Why is matched pairs better than repeated measures?
The tailored participant-matching process reduces the risk of participant variables (individual differences) from affecting results between conditions. Different participants need to be recruited for each condition, which is difficult and expensive.
What are the advantages of repeated measures design?
The primary strengths of the repeated measures design is that it makes an experiment more efficient and helps keep the variability low. This helps to keep the validity of the results higher, while still allowing for smaller than usual subject groups.
What is a weakness of independent measures design?
However, the disadvantage of independent measures design is that there is the potential for error due to individual differences between the groups of participants. A repeated measures design consists of testing the same individuals on two or more conditions.
What is repeated measures design in psychology?
Repeated measures design is an experimental design where the same participants take part in each condition of the experiment. This means that each condition of the experiment uses the same group of participants. Click to see full answer.
What is a weakness of a repeated measures design?
On the other hand, a weakness of the repeated measures design is that because participants take part in all the conditions in the research they are more likely to become bored or practiced as they progress through the conditions which will result in measuring unnatural behaviour thus lowering internal validity.
How many subjects do you need for a repeated measures design?
For example, if an independent groups design requires 20 subjects per experimental group, a repeated measures design may only require 20 total. Quicker and cheaper: Fewer subjects need to be recruited, trained, and compensated to complete an entire experiment.
What is the strength of the independent measures design?
A strength of the independent measures design is that participants only take part in one condition therefore demand characteristics are minimised. (4) Order effects: When participants repeat a task, results can be affected by order effects. Order effects include: * Performing less well than you would normally due to boredom or fatigue