Methods of inquiry provide the structured pathways through which nurses gather data, question routine practices, and build the evidence base for patient care. Without systematic inquiry, clinical decisions rely solely on habit, which can lead to outdated or unsafe interventions. Nursing science depends on asking the right questions to understand patient responses, evaluate treatments, and improve health outcomes across diverse populations in Nigeria and globally.
Much of early nursing practice relied on tradition and authority, where procedures were passed down simply because "that is how we have always done it" or because a senior doctor or nurse ordered it. While authority and tradition offer quick guidance, they lack scientific verification. Relying exclusively on an expert's opinion can perpetuate errors, as authority figures are not immune to bias or outdated knowledge.
The scientific method offers a disciplined, step-by-step approach to acquiring knowledge. It minimizes personal bias through objective observation, measurement, and experimentation.
Quantitative research focuses on numbers, measurement, and statistical analysis. It answers questions about cause and effect, prevalence, and relationships between variables. Common designs include experimental studies, quasi-experimental studies, and descriptive surveys. For instance, measuring the exact reduction in blood pressure after administering a specific antihypertensive drug is a quantitative approach.
Qualitative research explores human experiences, meanings, and perceptions through narrative data. Instead of counting variables, qualitative methods seek to understand the lived experiences of patients, such as how mothers cope with losing a child in a rural Nigerian clinic. Common traditions include phenomenology, ethnography, and grounded theory. Data is gathered through open-ended interviews, observations, and field notes.
Complex healthcare problems often cannot be fully understood through numbers or words alone. Mixed methods inquiry combines both quantitative and qualitative approaches within a single study. For example, a researcher might measure patient compliance rates using statistics (quantitative) while simultaneously interviewing patients to discover why they skip doses (qualitative). This combination provides a more complete picture of clinical challenges.
All methods of nursing inquiry must respect the rights and dignity of human participants. Ethical principles such as informed consent, confidentiality, and beneficence are mandatory before any data collection begins. Researchers must ensure that vulnerable populations, such as children or unconscious patients, are protected from harm and coercion, regardless of how important the scientific question might be.