Week_4_SPSS_design - SAN JOS STATE UNIVERSITY College of...

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SAN JOSÉ STATE UNIVERSITY College of Social Work S. W. 242 Spring 2008 Edward Cohen Week 4: February 15, 2008 Design of Quantitative Survey Instruments / Introduction to SPSS and Descriptive Statistics “There are three kinds of lies: lies, damned lies, and statistics.” --attributed to Benjamin Disreali (1804-1881) Concepts You Should Know: Frequency (of a variable) Frequency distribution Absolute frequency distribution Cumulative frequency distribution Cumulative percentage frequency distribution Bar graph Histogram Frequency polygon Measures of central tendency Mode Median Mean (average) Measures of variability Range Percentile Interquartile range Variance Standard deviation SPSS Data Editor SPSS data view screen SPSS variable view screen o Variable label o Variable values “Click and point” method of data entry Syntax method of data entry SPSS output I. Design of Data Collection Instruments A. Review: asking the right questions: 1. Avoid leading questions 1
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2. Avoid double barreled questions 3. Match the language with age and cognitive levels of target population 4. Match the question with the intended cultural meaning of the target population 5. Build in ways to minimize error in response due to memory limitations 6. Remember—the attributes for “check one” questions should be exhaustive and mutually exclusive 7. Consider the order of questions in the instrument/survey: a) Least sensitive (such as basic demographic info) to most sensitive b) Whenever possible, questions should flow like a conversation c) Prepare a few prompts for each question (could be in the instructions to the interviewer) to encourage response B. A few important technical formatting principles: 1. See Rubin & Babbie, Chapter 9 for good examples of formatting 2. Number and identify sub-questions (1, 1a, 2, 2a, 2b etc.) to help respondents
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Week_4_SPSS_design - SAN JOS STATE UNIVERSITY College of...

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