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What is the difference between a IQ test being reliable and it being valid?
Wiki User
∙ 9y ago
Reliability and validity are both important yet different qualities of any measure, including IQ tests. Reliability has a number of different meanings. Reliability might refer to test-retest reliability, which means that you don't get wildly different results each time you take a test. Reliability also refers to the consistency with which observers interpret your results. You would not want two physicians disagreeing about the results of a lab test for cancer. Standardized IQ tests, such as the Stanford-Binet and Wechsler, typically hold up well in assessments of their reliability.
Validity means that a measure measures what it is supposed to measure. In other words, does an IQ test really measure intelligence? Usually, validity is assessed by seeing if the results of a measure correlate with other similar measures. IQ scores and grades on academic work are positively correlated. Much of the debate surrounding IQ testing is due to different definitions of "intelligence" and discussions about what qualities an IQ test really measures.
It is possible for a measure to be reliable but not valid. For example, your bathroom scale might tell you every day that you weigh 150 pounds, but your scale might be broken and your true weight at the doctor's office is different. It is not possible, however, to have validity without reliability.
Wiki User
∙ 9y ago
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What is the difference between a valid deductive argument and a fallacy?
A valid deductive argument will have a valid premise and conclusion and a fallacy may be true, it all matters on how you came to the conclusion.
What is the difference between a valid or invalid argument?
An invalid argument is when the facts you are using are invalid or your forms of defense are wrong or incorrect, a valid argument is the opposite of an invalid argument. "There is a windmill in my beard. your argument is invalid." (This is a good example of a bad contradiction)
What is the difference between continuous and discontinuous and discrete variables?
A continuous variable is a variable for which all possible representations are valid. A discrete variable is a variable for which only some representations are valid. Discontinuous variables apply to data sets where values recorded during particular periods are missing from the set.
What is the difference between primary data and secondary data?
primary data is data which has been collected by yourself, which is more reliable and up to date. secondary data has been collected from a secondary source (Other people, business etc.) so it may not be valid or up to date
What is the difference between finite element method and Ritz method?
The main difference between the Rayleigh-Ritz method (RRM) and the finite element method lies in the definition of the basis functions. For FEM, these are element-related functions, whereas for RRM these are valid for the whole domain and have to fit the boundary conditions. The Rayleigh-Ritz method for homogeneous boundary conditions leads to the same discretized equations as the Galerkin method of weighted residuals.
What is the difference between a valid test and a reliable test?
Reliable indicates that each time the experiment is conducted, the same results are obtained (accuracy). Valid indicates the experiment (or test) has controlled variables and used an appropriate method/model.
Can a test be reliable and yet not valid?
A test may be reliable yet not valid, The results can end up being reliable, in other words certain to have yielded properly based on input. But the results may not be trustworthy.
What is the difference between valid and accurate?
Valid means that something is logically sound or based on acceptable reasoning, while accurate means that something is correct or true to a certain degree of precision. Validity relates to the strength of an argument or statement, while accuracy relates to how close a measurement or statement is to the truth.
Why is it possible to have a reliable measure that is not valid but impossible to have a valid measure that is not reliable?
A reliable measure is consistent and yields consistent results, so it may not be measuring the intended construct accurately (lack validity). On the other hand, a valid measure accurately assesses the intended construct, but it must be consistent and produce stable results (reliable) to ensure that the measurements are dependable and trustworthy.
Is a reliable test necessarily valid?
In my view reliable test is always valid.
Is it possible for an operational definition to be valid but not reliable?
Is it possible for an operational definition to be valid but not reliable
What is the difference between slection crieteria and validity and reliability?
Social and Medical sciences uses these statistical concepts. ideally, we have to measure the same way each time, but intrasubject, interobserver and intraobserver variance occur, so we have to anticipate and evaluate them. In short, it is the repeatability of a measurement, by you, myself and everybody person or instrument. Validity is how much the mean measure that we got is near of the true answer or value. So, an instrument can be reliable but not valid, valid but not reliable, both valid and reliable, nor valid neither reliable. I suggest that you imagine a target: you can aim and 1) always get the center (both valid and reliable) 2) always get the same distant point (reliable but not valid) 3) err much around the true center (valid but not reliable - the mean and median of your arrow's shot will get the center) 4) err much around the another center, false one (nor valid neither reliable) I did not understood exactly what selection criteria have to do with the rest of question, so, left in blank ;-)
What is the difference between a valid trust and enforceable contract?
a valid trust is true and an enforcebale trust can be enforced
What is the difference between valid and reliable?
I think that with reliability we mean that the plans tha you propose are based on some spesific and realistic elements. With validity I think that we mean that these elements are true and modern.
A test may be reliable but not necessarily validIs it possible for a test to be valid but not reliable?
No, for a test to be valid, it must also be reliable. Reliability refers to the consistency of the test results, while validity refers to the accuracy of the test in measuring what it is supposed to measure. A test cannot be valid if it is not reliable.
What is the difference between a valid deductive argument and a fallacy?
A valid deductive argument will have a valid premise and conclusion and a fallacy may be true, it all matters on how you came to the conclusion.
What is the difference between valid and genuine?
The difference between genuine and original is very simple. Genuine is something that is real while original is the first of something.
