When the research participants recruit other participants for a test or study, it is called?

RUHS, Jaipur, M.Sc Nursing Entrance Exam-2021

Nursing Research & Statistics

Easy

Appeared in: RUHS, Jaipur, M.Sc Nursing Entrance Exam-2021

Explanation

Snowball sampling is a non-probability sampling method where existing study subjects recruit or refer other potential subjects from their network.
This technique is also known as chain-referral sampling, network sampling, or link-tracing sampling because the sample size grows through referrals, much like a snowball rolling downhill.
It is the most suitable method for studies involving populations that are difficult for a researcher to access directly, such as individuals with stigmatized conditions or those involved in illicit activities.

Option A: Purposive sampling involves the researcher handpicking participants based on their specific knowledge, experience, or characteristics relevant to the study's purpose. It does not involve participants recruiting others.
Option B: Random sampling is a probability sampling method where every individual in the population has an equal chance of being selected. This is the opposite of snowball sampling, which is non-random and relies on referrals.
Option D: Convenience sampling involves selecting participants who are most easily accessible to the researcher. While simple, the selection is based on availability, not on referrals from other participants.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Non-probability sampling methods in research as background academic context rather than a clinical decision trigger.
Nurse researchers often use snowball sampling to investigate sensitive topics or hidden populations where a formal list of participants does not exist. Examples include studying the healthcare experiences of undocumented immigrants, the coping strategies of families with a member suffering from a stigmatized mental illness, or adherence to treatment among commercial sex workers.
Understanding this method is crucial for nurses to critically appraise research studies. While valuable for exploratory research, its non-random nature means findings cannot be generalized to a broader population due to the high risk of sampling bias.
What if? If a researcher's goal was to determine the average job satisfaction of all registered nurses in India, snowball sampling would be inappropriate. A probability method, such as stratified random sampling (grouping by state or hospital type), would be required to obtain a representative sample and generalizable results.

How to Approach the Question

First, identify the key action described in the question stem: 'research participants recruit other participants'.
Recognize this mechanism as a form of referral or networking.
Next, evaluate each option based on its definition in research methodology.
Eliminate 'Random sampling' because it implies every member has an equal chance of selection, with no role for participant referral.
Eliminate 'Convenience sampling' as it is based on ease of access for the researcher, not referrals.
Eliminate 'Purposive sampling' because the researcher actively selects participants based on judgment, not referrals from other subjects.

Concept Tested & Keywords

QZ9Jz-CjkosZoECI_niZju

E6 NursingResearch Suresh Sharma 5e Part 1 pp. 246-248, 247-249

E6 NursingResearch Sukhpal Kaur p. 261-263