Variables
Otherwise known as the grouping variable.
What is the independent variable.
This letter represents the intervention in a visual research design.
What is the X in a research design.
A threat to validity due to the natural passage of time.
What is maturation?
Data that groups items by food group.
What is nominal data?
These types of tests have specific assumptions that must be met of the data, including approximating the normal distribution.
What are parametric tests?
In an RCT, these are the experimental and control groups.
What is the independent variable.
When looking at a visual representation of a research design, this indicates when measurements occur.
What is the "O" in a research design.
The effect of performing differently because you know you're being tested.
What is the testing effect?
This type of data/variable is needed for parametric analysis.
What is a continuous variable? (or interval/ratio data)
The statement that there is no difference (and this is tested).
What is the null hypothesis?
In research this can change, or have variation. There are many different types.
What is a variable?
In a visual representation of a research design, this indicates that subjects have been randomized.
What is an "R" in a research design?
What is instrumentation effect?
This type of data has equal measurement/increments between values.
What is interval or ratio data?
The test that compares means between two unrelated groups.
What is the independent t-test?
This variable is one that the researchers do not have control over and cannot manipulate.
What is the dependent variable?
R O X O
R O O
What is a classic RCT design?
A threat to validity because I picked all of my favorite students to be in the intervention group.
What is selection bias?
This type of data has a true zero.
What is ratio data?
This test compares frequencies in a contingency table based on observed and expected values.
What is the chi-square test?
Otherwise known as the outcome variable of interest.
What is a dependent variable?
000000X000000
What is a time series design? (quasi-experimental)
A threat to validity because my study lasted 6 years and a large number dropped out.
What is mortality effect?
This type of data is actually ordinal, but can be treated as interval under the right circumstances.
What is likert scale data?
The parametric test you would selected to compare means between MORE than two groups.
What is ANOVA?