Explain the difference between validity and reliability. Explain NHANES and BRFSS.

Expert Solution

The difference between validity and reliability is that validity refers to how well a test measures what it is purported to measure. While reliably is necessary it alone is not sufficient. For a test to be reliable it's needs to be valid.

Validity of measuring instrument represent the degree to which the scale measures what it is expected to measure. Reliability refers to the degree to which measurements produces consistent outcome.

NHANES - national health and nutrition examination survey. It is a program of studies designed to access the health and nutritional status of adults and children in US. It is unique since it combines bothinterviews and physical examination.

BRFSS - Behavioral risk factor survelliance system. It is a uS health survey that looks at behavioral risk factor. This is run by centers for disease control and prevention and conducted by individual state health department.

gladiator answered 2 years ago

Reliability vs. Validity -How would you explain the difference between reliability and validity? Which examples would...

Reliability vs. Validity -How would you explain the difference between reliability and validity? Which examples would you use to illustrate the concept? NCSU: Fan Aptitude Test- Suppose this clip demonstrated a serious aptitude test. What would the results of a fan aptitude test reveal to us? Is this a valid test of intelligence? Why or why not? NFL and the Wonderlic Test- Why do employers give job candidates tests like the Wonderlic? How do results on the Wonderlic apply to...

Discuss the difference between validity and reliability. Define a group and explain the differences between primary...

Discuss the difference between validity and reliability. Define a group and explain the differences between primary and secondary groups.

Here is the question of today: Reliability vs. Validity How would you explain the difference between...

Here is the question of today: Reliability vs. Validity How would you explain the difference between reliability and validity? Which examples would you use to illustrate the concept? NCSU: Fan Aptitude Test Suppose this clip demonstrated a serious aptitude test. What would the results of a fan aptitude test reveal to us? Is this a valid test of intelligence? Why or why not? NFL and the Wonderlic Test Why do employers give job candidates tests like the Wonderlic? How do...

1. What is the major difference between reliability and validity? Is it possible to have a...

1. What is the major difference between reliability and validity? Is it possible to have a scale that is reliable, but not valid? If so, how?

What is reliability and validity of measurement? Explain procedure for testing reliability and validity of survey...

What is reliability and validity of measurement? Explain procedure for testing reliability and validity of survey instrument used in your research.

3. What is the difference between reliability and validity? Can a test have one without the...

3. What is the difference between reliability and validity? Can a test have one without the other? Is a person’s level of intelligence influenced more by heredity or environment?

Explain the importance of validity and reliability in diagnostic testing or research. describe how validity relates...

Explain the importance of validity and reliability in diagnostic testing or research. describe how validity relates to sensitivity and specificity in diagnostic testing. identify a health screen specific to a diagnostic test that is currently being debated regarding its use, recommended ages or frequency and discuss how validity and reliability plays into this debate. what other factors should you consider when you assess the recommendations for diagnostic test or screen?

Having trouble distuguishing between reliability, validity, objectivity and accuracy Reliability states that the test will produce...

Having trouble distuguishing between reliability, validity, objectivity and accuracy Reliability states that the test will produce the same results on Tuesday morning as the will on Thursday morning, correct? And accuracy results will be the same regardless of who administers the test?

Q. The trade-off between reliability and construct validity has been referred to internal / external validity....

Q. The trade-off between reliability and construct validity has been referred to internal / external validity. Explain them.

a. What are the research reliability and validity? What is internal validity and construct validity? What...

a. What are the research reliability and validity? What is internal validity and construct validity? What are the difference between reliability and validity? b. Please describe research hypothesis and statistical hypothesis. What are the difference between these two kinds of hypotheses? c. What are three level of research? Exploratory research, descriptive research and explanatory research? What are the difference between them? d. What are case-control design, nested case-control design, and cohort design? What are the difference between case-control design and...

Question