tailieunhanh - Lecture Communication research - Chapter 6: Measurement
The learning objectives for this chapter include: Verify the way in which researchers assign or impose meaning on numbers and scores, determine the manner in which a researcher is making measurement comparisons, identify whether the appropriate level of measurement is being used, understand the basic principles of validity and reliability and how they affect research results reported in journals,. | Chapter 6 Measurement Associated with quantitative studies Numbers used as a tool for identifying and presenting information Links the conceptual to the empirical Necessary to conduct quantitative research Copyright c 2001 The McGraw-Hill Companies, Inc. Measurement Principles Numbers measure value, intensity, degree, depth, length, width, distance Descriptive and evaluative device Numbers have no value until we provide meaning Includes everything the researcher does to arrive at a number Details the operationalization of the variable Copyright c 2001 The McGraw-Hill Companies, Inc. Levels of Measurement Discrete or continuous Both representative of communication phenomena Each produces different kind of data How data are collected determines how they can be used in statistical analyses Copyright c 2001 The McGraw-Hill Companies, Inc. Discrete Data The presence or absence of some characteristics Also known as nominal or categorical data Categories Reflect different types . | Chapter 6 Measurement Associated with quantitative studies Numbers used as a tool for identifying and presenting information Links the conceptual to the empirical Necessary to conduct quantitative research Copyright c 2001 The McGraw-Hill Companies, Inc. Measurement Principles Numbers measure value, intensity, degree, depth, length, width, distance Descriptive and evaluative device Numbers have no value until we provide meaning Includes everything the researcher does to arrive at a number Details the operationalization of the variable Copyright c 2001 The McGraw-Hill Companies, Inc. Levels of Measurement Discrete or continuous Both representative of communication phenomena Each produces different kind of data How data are collected determines how they can be used in statistical analyses Copyright c 2001 The McGraw-Hill Companies, Inc. Discrete Data The presence or absence of some characteristics Also known as nominal or categorical data Categories Reflect different types not differing amounts Have no inherent value Must be mutually exclusive, exhaustive, and equivalent Copyright c 2001 The McGraw-Hill Companies, Inc. Continuous Level Data Reveals quantity, intensity, or magnitude Values that differ in degree, amount, or frequency can be ordered on a continuum Three types Ordinal data Interval data Ratio data Copyright c 2001 The McGraw-Hill Companies, Inc. Ordinal Data Ranks elements in logical numerical order Sequence suggests value of data Ranking positions are relative Distance between ranks is unknown Zero does not exist Copyright c 2001 The McGraw-Hill Companies, Inc. Interval Data Identifies highest, next highest, and so on Identifies exact difference between and among scores Acknowledges zero Allows meaningful comparisons Likert-type scales Semantic differential scales Copyright c 2001 The McGraw-Hill Companies, Inc. Ratio Data All of the characteristics of ratio data Zero is absolute Indicates complete lack of the variable .
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