| Author | Definition |
|---|---|
| Creswell (2014) | The process of collecting information from various sources to address a research problem.” |
| Kerlinger (1986) | “The systematic gathering of data for a specific purpose.” |
| Best & Kahn (2006) | “A methodical process of obtaining information that is relevant to the subject of study.” |
| Leedy & Ormrod (2015) | “The process of gathering facts, figures, and details that can help answer a research question.” |
| Cohen et al. (2018) | “A systematic process in which researchers collect empirical evidence to support their study.” |
| Kumar (2019) | “The process of gathering data using a variety of research methods, ensuring reliability and validity.” |
Source: Google Scholar
While the wording differs slightly, all authors agree on several core ideas:
Creswell (2014)
Kerlinger (1986)
Best & Kahn (2006)
Leedy & Ormrod (2015)
Cohen et al. (2018)
Kumar (2019)
Clarify what information is needed and why.
Choose surveys, interviews, observations, etc.
Collect information systematically and ethically.
Check for accuracy, then store securely.
| Method | Description | Best Used For |
|---|---|---|
| Surveys | Structured questionnaires to collect quantitative or qualitative data. | Large-scale opinion polls. |
| Interviews | One-on-one or group discussions for in-depth information. | Detailed case studies. |
| Observation | Recording behaviors or events as they occur naturally. | Ethnographic research. |
| Document Analysis | Reviewing existing records or archives. | Historical or policy studies. |

Data collection ensures that findings are based on factual, relevant, and reliable information, improving the validity of results.
Primary (first-hand data from participants) and secondary (existing data from prior studies or academic databases).
It depends on the study’s purpose, but combining multiple methods often increases reliability.
By using tested instruments, training data collectors, and applying quality checks.
Data collection, as defined by numerous authors, is the backbone of credible and evidence-based research. While the definitions vary slightly depending on the researcher’s perspective, the central goal remains the same: to gather reliable, relevant, and accurate data to answer research questions and validate findings.
By understanding the meaning and application of these definitions through practical examples, researchers can design effective methodologies that enhance the quality of their results.
Whether the method is structured surveys, in-depth interviews, or observational studies, the careful planning and execution of data collection ensure that the research stands up to academic scrutiny and offers actionable insights.
In today’s digital age, where vast amounts of data are at our fingertips, adopting rigorous data collection practices becomes not just a necessity but a mark of research excellence.