Exam 3: Defining, measuring, and Manipulating Variables

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Identify the four scales of measurement noting the properties of measurement each scale has.

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The nominal scale has the property of identity; the ordinal scale has the properties of identity and magnitude; the interval scale has the properties of identity,magnitude,and equal unit size; and the ratio scale has the properties of identity,magnitude,equal unit size,and a true zero.

Correlation coefficients can vary between

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A

What is an operational definition? Give an operational definition of intelligence.

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An operational definition is a definition of a variable in terms of the operations (activities)a researcher uses to measure or manipulate it.Thus,an operational definition of intelligence could be based on one's score on an intelligence test or on one's ability to solve a problem that the researcher has determined requires intellectual ability.

A scale of measurement in which objects or individuals are categorized and the categories form a rank order along a continuum is a(n)_____ scale.

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Time is to the _____ scale of measurement as ethnicity is to the _____ scale of measurement.

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A property of measurement in which objects that are different receive different scores is

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Which of the following is not a type of validity?

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Discrete variables are to _____ and continuous variables are to _____.

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Arranging a group of individuals from tallest to shortest represents the _____ property of measurement.

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Identify the three types of self-report measures discussed in the text and briefly describe each.

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_____ reliability is determined by assessing the degree of relationship between scores on the same test administered on two different occasions.

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When applying for a part-time job at the local supermarket Bob was given a test to determine how well he would bag groceries.The next week Bob took the SAT in order to satisfy a college admissions requirement.The test at the supermarket was a measure of _____ validity whereas the SAT was a measure of _____ validity.

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Truthfulness is to _____ as consistency is to _____.

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If observers in a study disagree 35 times out of 90,what is the interrater reliability? Interpret this interrater reliability coefficient.

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A definition of a variable in terms of the activities a researcher uses to measure or manipulate it is a(n)

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Sara decided to have participants in her study of the relationship between diet and weight keep a journal of everything they ate each day.The type of measurement that Sara is employing is known as a(n)

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_____ reliability is determined by correlating scores on one half of a measure with scores on the other half of the measure.

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Which of the following is not a type of reliability?

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A scale of measurement in which,in addition to order and equal units of measurement,there is an absolute zero that indicates an absence of the variable being measured is a(n)_____ scale.

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Explain the difference between discrete and continuous variables.

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