The statement of predicted relationship between two or more variables?

KPSC Staff Nurse - 2015

Nursing Research & Statistics

Easy

Appeared in: KPSC Staff Nurse - 2015

Explanation

A hypothesis is defined as a formal, tentative statement that predicts the expected relationship between two or more variables in a study.
It converts a research problem into a clear, declarative statement that anticipates the study's outcome, making it testable.
This prediction is central to quantitative research methods, where it is statistically tested to be either supported or rejected.
For example, a hypothesis might predict that 'patients who receive a structured preoperative education session will report lower levels of postoperative anxiety than those who do not.'.

Option A: An assumption is a statement or principle that is accepted as true without requiring proof or verification. It serves as a baseline for the study but is not a prediction to be tested.
Option C: A theory is a much broader, more established set of ideas that explains a phenomenon. It is built from multiple confirmed hypotheses, rather than being a single, specific prediction for one study.
Option D: A construct is an abstract concept or idea that is being investigated (e.g., pain, anxiety, wellness). The hypothesis makes a prediction about the construct, but it is not the construct itself.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Core Concepts in Nursing Research as background academic context rather than a clinical decision trigger.
Understanding hypotheses is crucial for nurses to engage in evidence-based practice (EBP). It allows them to critically appraise research studies and determine if the findings are valid and applicable to their clinical setting.
Nurses often participate in quality improvement (QI) projects that test hypotheses, such as predicting that a new hand hygiene protocol will reduce the rate of hospital-acquired infections.
What if? If the goal was to explore and understand patients' feelings about a new diagnosis without making a prediction, the study would be qualitative and would start with a research question or purpose, not a hypothesis.

How to Approach the Question

This is a factual recall question that tests your knowledge of fundamental research terminology.
First, identify the keywords in the question stem: 'predicted relationship' and 'two or more variables'.
The word 'predicted' is the most important clue, as it implies a statement that is forward-looking and requires testing for verification.
Next, evaluate each option against this definition.
An 'assumption' is taken as true, not predicted. A 'theory' is a broad explanation, not a single prediction. A 'construct' is the concept being studied.
A 'hypothesis' is the only term that specifically means a testable prediction about the relationship between variables.

Concept Tested & Keywords

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E6 NursingResearch Suresh Sharma 5e Part 1 pp. 105-107, 98-100