What can be a desirable sampling technique if your samples are injection drug users?

AIIMS Manglagiri NO - 2019

Nursing Research & Statistics

Easy

Appeared in: AIIMS Manglagiri NO - 2019

Explanation

Snowball sampling is specifically designed for hard-to-locate populations.
It uses a chain-referral process where existing subjects recruit future subjects from among their acquaintances.
This method is effective for populations like injection drug users because it leverages existing social networks and trust, which helps overcome barriers like stigma and fear of legal issues.
It is a cost-efficient way to find and recruit participants who would otherwise be inaccessible to researchers.

Option A: Quota sampling requires the researcher to know the proportions of different subgroups in the population (e.g., age, gender). This information is typically unavailable for hidden populations like injection drug users, making it impractical.
Option B: Convenience sampling involves selecting the most easily accessible individuals. For injection drug users, this would likely result in a highly biased sample (e.g., only those visiting a specific clinic) that is not representative of the broader population.
Option C: Purposive sampling relies on the researcher's judgment to select participants they believe are 'typical' or representative. While it can be useful, it's difficult for a researcher to have enough knowledge to select a truly representative sample of a hidden population without significant bias.

Clinical Relevance

Nursing practice connection: Knowing Research sampling techniques for hidden populations helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Understanding and using the correct sampling method is crucial for conducting valid research on vulnerable populations like injection drug users.
Effective research helps public health nurses and policymakers develop targeted interventions for harm reduction, disease prevention (e.g., HIV, Hepatitis C), and treatment programs.
What if? If the research population was 'nurses working in a specific hospital', a more appropriate method would be stratified random sampling. The researcher could stratify by department or years of experience and then randomly select nurses from each group to ensure a representative sample.

How to Approach the Question

First, identify the key characteristic of the population in the question: 'injection drug users' are a hidden, hard-to-reach, and often stigmatized group.
Next, consider the nature of each sampling technique provided in the options.
Evaluate the suitability of each technique for a hidden population.
Quota sampling requires knowing population proportions, which is not feasible here.
Convenience sampling would lead to a biased, unrepresentative sample.
Purposive sampling is limited by the researcher's ability to identify representative individuals.

Concept Tested & Keywords

Concept Tested: Research sampling techniques for hidden populations
Stem keywords: sampling technique, injection drug users, samples
Lead-in keywords: desirable
Clinical cues: The population 'injection drug users' is a key cue, indicating a hard-to-reach or hidden group, which points toward specific non-probability sampling methods.

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