The single most important advantage of a within-subjects design is that
you do not have to worry about individual differences confounding your results
because all treatment groups include the exact same partcipants.
What is the major strength of the within-subjects design quizlet?
exposed to only one level of the independent variable. What is the major strength of the within-subjects design?
It guarantees that the participants in the various conditions are equivalent at the start of the study.
Which of the following is an advantage of a within-subjects design over a between-subjects design?
Within-subjects designs cope with the problem of error variance by: using the same subjects in all treatment conditions. An advantage of a within-subjects design over a matched-pairs between-subjects design is that:
measuring subject characteristics is unnecessary in a within-subjects design.
Which of the following is an advantage of a within-subjects experimental design?
An advantage of using a within-subjects design is
that fewer participants are required overall (economizing) because the same participants are observed in each group
. A second advantage of using the within-subjects design is that the test statistic for this design has greater power to detect an effect between groups.
Which of the following is an advantage of within groups design?
What are some advantages of within groups designs?
It ensures the participants in the two groups will be equivalent
(because they are the same people). Variations among participants will not effect results because their scores are only rated against themselves and not others.
What is an example of within-subject design?
Another common example of a within-subjects design is
medical testing
, where researchers try to establish whether a drug is effective or whether a placebo effect is in order. The researchers, in the crudest form of the test, will give all of the participants the placebo, for a time, and monitor the results.
Why is within-subjects more powerful?
A within-subjects design is
more statistically powerful than a between-subjects design
, because individual variation is removed. To achieve the same level of power, a between-subjects design often requires double the number of participants (or more) that a within-subjects design does.
What are within-subjects?
A within-subject design is
a type of experimental design in which all participants are exposed to every treatment or condition
. The term “treatment” is used to describe the different levels of the independent variable, the variable that’s controlled by the experimenter.
What is the primary disadvantage of the between-subjects design?
What is the primary disadvantage of the between-subjects design?
the internal validity of the study is threatened
.
What is the carry over effect?
Carryover effects are challenging for within-subjects research designs, that is,
when the same participants are exposed to all experimental treatments and results are compared across different treatments
. … This is known as a carryover effect.
When should you use a within-subjects design?
If interference is not anticipated
, or if the effect is minimal and easily mitigated through a few minutes of practice when a participant changes conditions, then a within-subjects design should be considered. However, one additional effect must be accounted for: learning.
What is a within-subjects factor?
Any categorical explanatory variable for which each subject experiences all of the levels
is called a within-subjects factor. (Or sometimes a subject may experience several, but not all levels.)
Is gender a between-subjects factor?
There are two groups of participants: boys and girls. They are independent with each other. Therefore,
gender (factor B) is a between-subjects variable
.
What is post test control group design?
The posttest-only control group design is
a research design in which there are at least two groups
, one of which does not receive a treatment or intervention, and data are collected on the outcome measure after the treatment or intervention.
What are the two main reasons to conduct a factorial study?
What are two reasons to conduct a factorial study? –
They test whether an IV effects different kinds of people, or people in different situations in the same way
. -Does the effect of the original independent variable depend on the level of another independent variable?
Is a survey a within-subjects design?
In a within-subjects design,
every person who takes the survey sees both ads, and then answers questions about each ad
including how likely they’d be to shop at your store.
