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Lecture 9

HRS 610 Lecture 9: Lecture 9
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Department
HRS - HRS-Human Rehab Services
Course Code
HRS 610
Professor
Bezyak

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Description
1. Survey Research  First Steps o Define Research Objectives.  Do you think this step is always followed? o Attend to Question Wording.  Keep it simple.  Avoid asking more than one question at a time.  This is a common problem among practitioners.  Avoid leading questions.  Avoid negative wording.  Response Options o Close vs. Open-ended Questions o Rating Scales  Is there a problem with a neutral option on a rating scale? o Semantic Differential Scale  What is this?  Administration o Questionnaires  How might they be distributed?  What are potential problems with internet surveys? o Interviews  Face-to-face  Telephone  Focus groups  Explain interviewer bias.  Sampling o What is the difference between a population and a sample? o What potential problems exist with creating a sample? o Population validity refers to the degree to which the sample of individuals in the study is representative of the population.  Do you think this is often a problem?  Sampling o Summary:  Sampling is taking a portion of the population, making observations on this smaller group, and then generalizing the findings to the parent population from which the sample was drawn. o An unrepresentative sample is a biased sample. o This is why random selection is so important.  What does random selection mean? o Accidental differences between characteristics of sample and population constitute sampling error. o The size of sampling error decreases with larger samples.  Why is non-random sampling used? o Simple random sampling  Every member of the population has an equal chance of being included in the sample, and the selection of one member from the population has no effect on the selection of another member.  Random sampling reduces the probability that a sample will be biased in some way, especially when the sample size is large.  What is used to produce a simple random sample? o Systematic Sampling  This procedures involves drawing a sample by
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