X hits on this document

PDF document

Fundamentals for the Consumer - page 24 / 31

81 views

0 shares

0 downloads

0 comments

24 / 31

96

CHAPTER 4

Table 4.1 (continued)

Method of sampling

Nonprobability Convenience

Purposive

Less costly

1.

1. Difficult to generalize to other subjects

2. Less timeconsuming

2. Less representative of an identified population

3. Ease of administration

3. Results dependent on unique characteristics of the sample

4. Usually assures high participation rate

5. Generalization possible to similar subjects

1. 1. 2, 3, 4. and 5 of convenience

1. 1, 2, and 3 of convenience

  • 2.

    Adds credibility to qualitative research

  • 3.

    Assures receipt of needed information

Quota

1. 1, 2, 3, 4, and 5 of convenience

2, More

representative of

population than convenience or

time-

  • 1.

    1, 2, and 3 of convenience

  • 2.

    Usually more consuming than convenience or purposive

purposive

Volunteers are commonly used in research because the availability of subjects is often limited by time and resources. There have been thou- sands of studies with teachers who volunteer their classes for research. Much research on school-age children requires written permission from parents, and this necessity can result in a biased sample. Suppose a searcher needed parents’permission to study their involvement in the education of their children. Chances are good that parents who are rela- tively involved would be most likely to agree to be in the study, affecting a description of the nature of parental involvement for “all” students.

re-

Sample Size

An important consideration in judging the credibility of research is the size of the sample. In most studies there are restrictions that limit the number of subjects, although it is difficult to know when the sample is

Document info
Document views81
Page views81
Page last viewedSun Dec 04 12:43:11 UTC 2016
Pages31
Paragraphs1362
Words8405

Comments