Three

Question 1

What is boundary setting

Answer 1

action of precess of determining and enacting selection criteria for study participants, study concepts or study phenomena

Question 2

What are guidelines for determining inclusion/exclusion criteria?

Answer 2

• Appropriateness - the extent to which the inclusion/exclusion criteria fit the overall purpose of the study – determined by research design, problem, purpose and structure
• Adequacy - the extent to which the inclusion/exclusion criteria yields sufficient data to answer the research problem

Saturation of data - qualitative
Sample size calculation - quanitative

Question 3

What are the steps of sampling in quantitative studies?

Answer 3

1. Define population
2. develop sampling plan
3. determine sample size
4. implement sampling procedures
5. compare critical values of sample to population

Question 4

What is probability sampling?

Answer 4

based on probability theory:

1. parameters of population are known
2. every member or element has equal probability of being selected

**Preferred for quantitative studies, higher external validity, can be impractical

Question 5

What are probability sampling examples?

Answer 5

• SIMPLE RANDOM SAMPLING: ex. drawing from a hat
• SYSTEMATIC SAMPLING: determining a sampling interval width based on the needed sample size, then selecting every ___ element from a sampling frame
• STRATIFIED RANDOM SAMPLING:
• CLUSTER SAMPLING

Question 6

What is non-probability sampling?

Answer 6

sample is not chosen on the basis of equal chance to be selected from a population

**used when not feasible to develop a sampling frame, easier to conduct

Question 7

What are non-probability sampling examples?

Answer 7

• CONVENIENCE SAMPLING - involvement of available subjects
• PURPOSIVE SAMPLING - deliberate selection of individuals by researcher on the basis of predefined criteria
• SNOWBALL SAMPLING - asking subjects to provide access to others who may meet the criteria
• QUOTA SAMPLING

Question 8

What are ways to set boundaries in qualitative studies?

Answer 8

• geographical location/physical setting
• cultural group
• personal experience

Question 9

What are strategies for sampling?

Answer 9

1. Maximum variation: seeking individuals who are extremely different along dimensions that are the focus of the study
2. Homogenous selection: choosing participants w/similar experiences
3. Theory based selection: choosing participants who exemplify a particular theoretical construct
4. Confirming or disconfirming cases: finding informants who will either support or challenge the emerging theory
5. Extreme case: select case that represents an extreme example of the phenomenon
6. Typical case: typical cases that characterize a phenomenon