Exam 5: Measurement: Research Using Numbers

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An ideal study has strong validity and reliability.

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Which of reliability or validity do you consider to be the most important in a measure? Explain why.

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Answers will vary, but arguments indicated in the text include the following: An ideal instrument has both reliability and validity. It should measure what it measures well and consistently. But validity has a theoretical priority. It does not matter how reliable an instrument is; if it is measuring something other than what you have in mind, it is, in a sense, capturing irrelevant data and has no value. That said, reliability has a claim also because if an instrument is unreliable, you can never properly assess its validity.

Correlation scores range between ______.

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Rank order questions are an example of ______ measurement.

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Discuss the advantages and disadvantages of using Likert-type scales as a way of measuring human communication.

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"Established measures," "split half," and "inter-item" are all types of validity measures.

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A course in communication ethics is essential to my career. Strongly Disagree Disagree Neutral Agree Strongly Agree The above is an example of a ______.

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Interval and ratio data are considered continuous variables.

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How would you explain the concept of measurement to someone not in this class?

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Likert and semantic differential questions have the same format.

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What is inter-item or internal reliability and why does it matter for our measurement?

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Briefly explain why we care about the type of category our data collection falls into?

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Which of the following is a type of reliability?

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Write one example each of a nominal, interval, and ratio variable.

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A Likert scale may have response options of "strongly agree" to "strongly disagree."

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The basic characteristic of interval measures is the assumption of ______.

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Likert-format questions use a scale anchored by words with opposite meanings.

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What does zero mean in ratio-level measurement?

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Ratio scales measure from a "true" zero point.

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How close can a measure ever come to capturing what it is supposed to capture? Discuss, with examples to support your discussion.

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