NURS 311 Lecture Notes - Lecture 8: Social Desirability Bias, Likert Scale, Observational Error
27 Feb 2020
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3 types of probability samples: simple random sample, systematic random sampling, stratified random sampling (e. g. biological sex, income level, gpa, place of residence etc. ) Non-probability: convenience, snowballing, quota, consecutive: choosing the first x number of people on a list, purposive. Sampling error: occurs due to chance, factors beyond your control. Larger the sample size, the greater the variability. Systematic bias: affects the entire study and can compromise an entire study. Interviews have much higher response rates than surveys. Social desirability bias: trying to be perceived as normal. Extreme response bias: outliers, such as the edges of the likert scale. Aquisense response bias: agrees with most of what the researcher is saying or telling them, yea-sayers, keep answers on the down low. Level of measurement: validated interval level scale. Checklist or rating for time" or events". Cronbach"s alpha: measures internal consistency reliability, anything below 0. 7 is not considered reliable.
