An extraneous variable is any variable you’re not interested in studying that could also have some effect on the dependent variable. For example, we might want to know how the number of hours that a basketball player trains per week affects their average points per game .
What is an extraneous example?
An extraneous solution is a root of a transformed equation that is not a root of the original equation because it was excluded from the domain of the original equation. Example 1: Solve for x , 1x − 2+1x + 2=4(x − 2)(x + 2) .
What is extraneous variable and how can it be controlled?
An extraneous variable is eliminated , for example, if background noise that might reduce the audibility of speech is removed. Unknown extraneous variables can be controlled by randomization. Randomization ensures that the expected values of the extraneous variables are identical under different conditions.
What is an example of an extraneous variable quizlet?
What is an extraneous variable? any variable other than the IV that could have an influence on the DV. For example: a test on alcohol & driving performance .
What are some examples of extraneous variables?
For example, if a participant is taking a test in a chilly room , the temperature would be considered an extraneous variable. Some participants may not be affected by the cold, but others might be distracted or annoyed by the temperature of the room.
How do you identify extraneous variables?
- An extraneous variable is anything that could influence the dependent variable.
- A confounding variable influences the dependent variable, and also correlates with or causally affects the independent variable.
What are the 3 types of variables?
These changing quantities are called variables. A variable is any factor, trait, or condition that can exist in differing amounts or types. An experiment usually has three kinds of variables: independent, dependent, and controlled .
What is an extraneous solution simple definition?
Extraneous solutions are values that we get when solving equations that aren’t really solutions to the equation .
What is the difference between intervening and extraneous variables?
extraneous variable are any variable which u r not intentionally studying in your experiment or test. intervening variable is a hypothetical variable used to explain casual links between other variables.
What’s the difference between extraneous and confounding variables?
Extraneous variables are those that produce an association between two variables that are not causally related. Confounding variables are similar to extraneous variables, the difference being that they are affecting two variables that are not spuriously related . ...
How do you prevent extraneous variables?
One way to control extraneous variables is with random sampling . Random sampling does not eliminate any extraneous variable, it only ensures it is equal between all groups. If random sampling isn’t used, the effect that an extraneous variable can have on the study results become a lot more of a concern.
What is meant by control of extraneous variables?
One way to control extraneous variables is to hold them constant . This can mean holding situation or task variables constant by testing all participants in the same location, giving them identical instructions, treating them in the same way, and so on. It can also mean holding participant variables constant.
What is controlled variable?
Control variables are the variables (i.e., factors, elements) that researchers seek to keep constant when conducting research . ... If used properly, control variables can help the researcher accurately test the value of an independent variable on a dependent variable.
What is meant by control of extraneous variables in research quizlet?
controls extraneous variables by keeping all aspects of the treatment conditions identical . constancy of conditions . controls extraneous variables by equally distributing their effects across treatment conditions.
Which is an example of a possible confounding variable quizlet?
Example: Participant may think that the researcher is too young to be credible . Psychological characteristics if the researcher can affect the behavior of the participants. Example: Personality may be off putting or researcher may be in a bad mood.
What problems do extraneous variables present in research?
Extraneous variables make it difficult to detect the effect of the independent variable in two ways. One is by adding variability or “noise” to the data . Imagine a simple experiment on the effect of mood (happy vs. sad) on the number of happy childhood events people are able to recall.
