CRM 2303 Lecture Notes - Lecture 5: Operational Definition, Face Validity, Criterion Validity
1 May 2016
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Words we use to represent mental images. Eg. , fear of crime = perceived vulnerability to risk of crime or danger. How you propose to measure your key concepts. Enables researchers to measure phenomena and others to replicate. Provide a bridge between theory, hypothesis, and observation/data. The process of measurement: conceptual definition, operational definition. Give specific empirical meaning to a concept. How you will derive or measure the indicator in a way that best approximates the conceptual definition. Specific indicators that are to be taken as representative of a theoretical construct or concept. Violence = slapping, hitting, punching, choking, rape, etc. Combines questions that stand on their own: income, education, occupation; 2. With that definition, we rule out many other possible aspects, such as inheritance, accumulated wealth, lifestyle, etc. ) Psychometric scales: combines individual items that can"t be separated. Values or categories are artifacts , creations of the researcher. We can"t directly observe the social world, only manifestations and construction of it.
