According to Drost (2011), non-probability sampling does not give equal chances to population selected. It is based on the purpose of the research. the strategies to select a sample include convenience sampling, criterion sampling, snowball sampling, judgmental and quota sampling. Through the strategies used, the subjects are chosen based on their accessibility and their purpose of the researcher. Data collection method could be observation, questionnaire, and interviews. The methods are cost-effective, least time consuming and provides a reliable and accurate information. The methods are vulnerable to errors, a low level of reliability and a high level of biases, and, they possess an inability to generalize research findings (Drost, 2011). The relationship between reliability and validity is that if a test is valid, then it must be reliable ( Etikan and Bala, 2017).
Ethical principles outline that research should be carried out upholding human right, respect, beneficence, and justice. The researcher should acquire data without the interference of the participants that may result in discomfort and stress. (Teddlie and Yu, 2007). In addition, research should avoid familiarity or conduct research on a well-known place like job place thus threatening validity and reliability and meaningfulness of data collected. The right procedure should be used when collecting data clearly explaining the purpose of the research.
Delegate your assignment to our experts and they will do the rest.
For example, the research aim at investigating Factors contributing to Neonatal Deaths.
Data collection method: Questionnaire
Strength
It is economical, practical, less time consuming, and allow gather information from the large audience.
Limitation:
The possibility of dishonesty from participant thus issues on reliability, it lacks conscientious response, subject to misinterpretation and misunderstanding of the questions.
The research test has been carried severally in previous studies. Through this tests, the results were the same thus showing the correlation was strong and hence test-retest reliability was good and the test was constructed valid indicating validity and reliability have a positive correlation
Ethical issues: The respondents not required to include their name. Information gathered treated as utmost confidentiality. Information gathered is for academic purposes.
References
Drost, E. A. (2011). Validity and reliability in social science research . Education Research and Perspectives, 38(1), 105–124.
Etikan, I., & Bala, K. (2017). Sampling and Sampling Methods. Biom Biostat Int J , 5 (6), 001-49.
Teddlie, C., & Yu, F. (2007). Mixed methods sampling: A typology with examples . Journal of Mixed Methods Research, 1(1), 77–100. doi: 10.1177/2345678906292430
