The group of people or animals in which the researcher is interested is called:

Appeared in: HP CHO -9 October 2022

Explanation

The term for the entire group a researcher is interested in is the 'Population'.
Since 'Population' is not an option, 'Sample' is the best answer. A sample is a smaller, manageable subset of the population that is selected for the actual research study.
Researchers study the sample to gather data and then generalize the findings back to the larger population of interest.
Therefore, the sample is the group that the researcher directly works with and studies.

Option A: The 'Experiment group' (or experimental group) refers specifically to the participants in an experimental study who receive the intervention or treatment being tested.
Option C: 'Controls' (or the control group) are the participants in an experiment who do not receive the treatment being studied. They are used as a benchmark to measure the effects of the treatment on the experimental group.
Option D: 'Variables' are not groups of people or animals. They are the attributes, characteristics, or factors that are measured, manipulated, or controlled in a study (e.g., age, weight, heart rate).

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Basic Research Terminology: Population vs. Sample as background academic context rather than a clinical decision trigger.
Understanding the difference between a population and a sample is fundamental for nurses to critically appraise research articles and determine the applicability of study findings to their own patient populations (generalizability).
Nurses often participate in data collection for research, so knowing these terms helps ensure the study protocol is followed correctly, for instance, by recruiting from the correct accessible population.
What if? If a study on a new wound care dressing used a sample of only young, healthy adults, a nurse would need to question if the findings are generalizable to their elderly patients with multiple comorbidities. This highlights the importance of sample representativeness.

How to Approach the Question

First, identify the core concept in the question. The question asks to name the 'group of people or animals' a researcher is interested in.
This is a definitional question requiring recall of basic research terminology.
Define each option in your mind: 'Experiment group' (receives treatment), 'Sample' (subset studied), 'Controls' (no treatment), 'Variables' (factors measured).
The most accurate term for the entire group of interest is 'Population'.
Since 'Population' is not an option, evaluate the given choices. The 'Sample' is the representative group selected from the population that the researcher actually studies.
Conclude that among the available options, 'Sample' is the most fitting answer as it's the group directly involved in the research to represent the population of interest.

Concept Tested & Keywords

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E6 NursingResearch Suresh Sharma 5e Part 1 p. 230-232

E6 Parks TextBook of Preventive & Social Medicine part 1 — Subpart A (pp 26-201 of 604) p. 75-77

Practise the full HP CHO -9 October 2022

Attempt every question from this paper in a timed mock, then review the full solution for each one.