Chapter 12 Qual

___________ sampling is the use of the most readily accessible persons or objects as participants in a study.

In certain qualitative studies, participants are added to the sample until _________ ______________ occurs (i.e. new data no longer emerge during data collection).

__________ criteria are used to select the sample from all possible units and ___________ may be used to restrict the population to a homogeneous group of participants.

For a study one educational opportunities for nurses in various ethnic groups, a list of all the nurses in \Ontario was sorted by ethnicity. The sample consisted of 10% of the nurses in each ethnic group, selected according to a table of random numbers.

Purposive sampling.

Every eighth person on a diabetic clinic client roster was asked to participate in the study. A random number table was used to start the sampling during the first sampling interval.

Convenience sampling limits the generalizability of findings largely because of the self-selection of participants.

Nonprobability sampling is associated with less generalizability to the larger population.

The sample consisted of adolescent mothers meeting the eligibility requirements and recruited from referrals to the community health services diversion of the public health department. Selection continued until the sample reached the target number of 144 participants. A computer-based procedure randomly assigned the mothers to one or two groups.

Using a random number table, a sample of 50 participants was selected from a list of all mothers who gave birth in the county during the first six months of the year.

Successive random sampling of units that progress from large to small and meet sample eligibility criteria is known as __________ sampling.

The sample consisted of parents chosen because of their knowledge and experience of being a parent with a child in a NIC-U. Inclusion criteria for parents were (1) a child admitted to the NIC-U for more than a week, (2) a gestation at birth of 26 or more weeks, (3) a child on a ventilator for at least three days, and (4) a child discharged home within the previous six months.

Random sampling has the greatest risk of bias and is moderately representative.

Stratified random sampling

The advantages of _____ ________ sampling are low bias and maximal representativeness, but the disadvantage is the labour in drawing a sample.

Cluster sampling

A statistical technique known as _______ ________ may be used to determine sample size in quantitative studies.

Simple random sampling.

Sampling strategies are grouped into two categories: _______ sampling and _________ sampling.

A(n) _________ sample is one whose key characteristics closely approximate those of the population.

Stratified random sampling uses a random selection procedure for obtaining sample participants.

Nonprobability sampling strategies are more time-consuming than probability sampling.

A(n) __________ can be used to select an unbiased sample or an unbiased assignment of participants to treatment groups.

A total of 155 infants were enrolled and divided into an intervention group of 72 infants and a control group of 83 infants. The numerical assignment was based on weight and gestational age.

A sample selected from residents of eight nursing homes in Alberta consisted of cognitively impaired persons with no physical impairments or other psychiatric illnesses.

Convenience sampling.

Systematic sampling

The easier the sampling strategy, the greater the risk of bias, and as sampling becomes easier to implement, the risks of bias and limited representation of the population increase.

Of the sampling strategies listed, purposive sampling procedures are the least generalizable.

Types of nonprobability sampling include __________, __________ and ___________ sampling.

The sample for a study of critical thinking behaviour among undergraduate nursing students consisted of students enrolled in junior and senior level courses in three schools of nursing. In each program, students were invited to participants until a total sample representing 10% of the junior level students and 10% of the senior level students was achieved.

Quota sampling