What is the main difference between independent groups and within groups designs?
In a within groups design they are exposed to all levels, in an independent groups design they are only exposed to one level. Participants are exposed to all the levels of an independent variable at roughly the same time, and a single attitudinal or behavioral preference is the dependent variable.
What advantages does a repeated measures Anova have over an independent measures design?
Advantages and Disadvantages 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 independent group design?
Independent groups design is an experimental design where different participants are used in each condition of the experiment.
Why is matched pairs design better than independent groups?
Matched Pairs Design 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 two disadvantages of within groups designs?
Fatigue is another potential drawback of using a within-subject design. Participants may become exhausted, bored, or simply uninterested after taking part in multiple treatments or tests. Finally, performance on subsequent tests can also be affected by practice effects.
What is a within groups design?
In a within-subjects design, or a within-groups design, all participants take part in every condition. It’s the opposite of a between-subjects design, where each participant experiences only one condition. All longitudinal studies use within-subjects designs to assess changes within the same individuals over time.
What is a weakness of repeated measures?
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 is an example of a repeated measures design?
In a repeated measures design, each group member in an experiment is tested for multiple conditions over time or under different conditions. For example, a group of people with Type II diabetes might be given medications to see if it helps control their disease, and then they might be given nutritional counseling.
Why is an independent groups design good?
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 repeated and independent measures?
Independent measures / between-groups: Different participants are used in each condition of the independent variable. Repeated measures /within-groups: The same participants take part in each condition of the independent variable.
What is the big disadvantage of using between?
The main disadvantage with between subjects designs is that they can be complex and often require a large number of participants to generate any useful and analyzable data. Because each participant is only measured once, researchers need to add a new group for every treatment and manipulation.
What is a between groups factor?
In the design of experiments, a between-group design is an experiment that has two or more groups of subjects each being tested by a different testing factor simultaneously.
What is the difference between a repeated measures design and an independent group design?
An independent measures design consists of using different participants for each condition of the experiment. A repeated measures design consists of testing the same individuals on two or more conditions. Click to see full answer In respect to this, why would you use an independent groups design?
How is matched pairs design different from independent measures?
Moreover, matched pairs design uses different participants for each condition, matching participants on key variables such as age, IQ, and gender. However, although this method combines the advantages of independent and repeated measures, it is an expensive and time consuming task.
Which is an advantage of an independent measures design?
An independent measures design is a research method in which multiple experimental groups are used and participants are only in one group. Advantages of independent measures design include less time/money involved than a within subjects design and increased external validity because more participants are used.
What are the advantages and disadvantages of repeated measures?
Advantages and Disadvantages 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. Considering this, what is an independent group design?