Chapter 8 – Sampling issues in research. In this chapter students will be able to: Explain the reasons for sampling, distinguish between probability and non-probability sampling methods, select an appropriate sampling procedure, explain the types of sampling bias, avoid sampling bias in your research designs now and in the future.
Trang 1Research Project
Chapter 8 – Sampling Issues in Research
Trang 2» Explain the reasons for sampling
» Distinguish between probability and nonprobability sampling methods
» Select an appropriate sampling procedure
» Explain the types of sampling bias
» Avoid sampling bias in your research designs now and in the future
Trang 3» Acquiescence bias
» Analytic process errors
» Area sampling
» Auspices bias
» Cluster sampling
» Confidence level
» Convenience sampling
» Destructive sampling
» Double sampling
» Extremity bias
» Intercept sampling
» Inference errors
» Internet sampling
» Interpretation errors
» Interviewer interaction bias
» Judgmental sampling
» Moderating variables
» Non–probability sampling
» Nonresponse bias
» Quota sampling
Trang 4˃ Precision
˃ Probability sampling
˃ Purposive sampling
˃ Proportional stratified
sampling
˃ Recording error
˃ Relevant sample
˃ Respondent bias
˃ Sample frame
˃ Sample selection
process
˃ Sample size
» Simple random sampling
» Snowball sampling
» Social desirability bias
» Stratified random sampling
» Systemic bias
» Systemic bias errors
» Target sample
Trang 5S Staff
T Time
E Efficiency
A Accuracy
M Money or Resources
Trang 6Strategies for Selecting a Sample
» Probability sampling
» Nonprobability sampling
» Internet sampling
Trang 7» Area sampling
» Custer sampling
» Double sampling
» Proportional stratified random sampling
» Simple random sampling
» Stratified random sampling
Trang 8NonProbability Sampling Strategies
» Convenience sampling
» Destructive sampling
» Intercept sampling
» Purposive or judgmental sampling
» Quota sampling
» Snowball sampling
Trang 9» Three Forms of Bias
˃ Systemic bias
˃ Respondent bias
˃ Interviewer bias
Trang 10» Analytic process errors
» Moderating variables
» Systemic bias
Trang 11» Acquiescence bias
» Auspices bias
» Extremity bias
» Nonresponse bias
» Social desirability bias
Trang 12» Inference errors
» Interviewer interaction bias
» Interpretation errors
» Recording errors
Trang 13» Purpose of the research
» Level of confidence needed
» Extent of precision required or desired
Trang 14» Anything unclear?
» One thing that I learned from this class is …