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Introduction to Research, Types of Research and Sampling Techniques


Authors : Vegi Chaitanya Kiran

Volume/Issue : Volume 11 - 2026, Issue 7 - July


Google Scholar : https://tinyurl.com/4hy343rx

Scribd : https://tinyurl.com/5f3xmpwk

DOI : https://doi.org/10.38124/ijisrt/26jul1307

Note : A published paper may take 4-5 working days from the publication date to appear in PlumX Metrics, Semantic Scholar, and ResearchGate.


Abstract : Research is a systematic and scientific process of collecting, analyzing, and interpreting information to answer questions, solve problems, and generate new knowledge. It serves as a fundamental tool for academic inquiry, policymaking, and evidence-based decision-making. The purpose of research may vary—from understanding basic concepts to addressing practical issues—and therefore, research is classified into several types. Broadly, research can be categorized as basic or applied, qualitative or quantitative, exploratory, descriptive, or explanatory, and experimental or non-experimental, each serving a unique objective within the research process. Along with identifying the type of research, selecting an appropriate sampling technique is essential for ensuring the validity and reliability of findings. Sampling techniques are generally divided into probability sampling (such as simple random, stratified, cluster, and systematic sampling), which provides every unit in the population a known chance of selection, and non-probability sampling (such as convenience, purposive, quota, and snowball sampling), which relies on researcher judgment or accessibility. Understanding the principles of sampling helps in obtaining a representative subset of the population, reducing cost, effort, and time while enhancing the accuracy of conclusions. Overall, a strong foundation in research concepts, types of research, and sampling techniques ensures high-quality studies and credible outcomes.

Keywords : Research, Investigation, Inquiry, Knowledge, Data Collection, Data Analysis, Hypothesis, Variables, Research Process, Scientific Method.

References :

  1. Cochran, W. G. (1977). Sampling Techniques https://onlinelibrary.wiley.com/doi/book/10.1002/9781118162915
  2. Kothari, C. R. (2004). Research Methodology: Methods and Techniques https://www.newagepublishers.com/samplechapter.aspx?id=9788122415223
  3. Trochim, W. M. K. (2006). Research Methods Knowledge Base https://conjointly.com/kb/
  4. Groves, R. M. et al. (2009). Survey Methodology https://onlinelibrary.wiley.com/doi/book/10.1002/9780470465462
  5. Singleton, R. A., & Straits, B. C. (2010). Approaches to Social Research https://global.oup.com/academic/product/approaches-to-social-research-9780195372984
  6. Kumar, R. (2011). Research Methodology: A Step-by-Step Guide https://www.sagepub.com/en-us/nam/research-methodology-3rd-edition/book235677
  7. Fowler, F. J. (2014). Survey Research Methods https://us.sagepub.com/en-us/nam/survey-research-methods/book243022
  8. Creswell, J. W. (2014). Research Design https://us.sagepub.com/en-us/nam/research-design/book255675
  9. Neuman, W. L. (2014). Social Research Methods: Qualitative and Quantitative Approaches https://www.pearson.com/en-us/subject-catalog/p/social-research-methods-qualitative-and-quantitative-approaches/P200000003295
  10. Patton, M. Q. (2015). Qualitative Research & Evaluation Methods https://us.sagepub.com/en-us/nam/qualitative-research-evaluation-methods/book232962
  11. Bryman, A. (2016). Social Research Methods https://global.oup.com/academic/product/social-research-methods-9780199689453
  12. Flick, U. (2018). An Introduction to Qualitative Research https://uk.sagepub.com/en-gb/eur/an-introduction-to-qualitative-research/book242504
  13. Yin, R. K. (2018). Case Study Research and Applications https://us.sagepub.com/en-us/nam/case-study-research-and-applications/book250150
  14. Saunders, M., Lewis, P., & Thornhill, A. (2019). Research Methods for Business Students https://www.pearson.com/en-gb/subject-catalog/p/research-methods-for-business-students/P200000003270
  15. Lohr, S. L. (2021). Sampling: Design and Analysis https://www.routledge.com/Sampling-Design-and-Analysis/Lohr/p/book/9780367275603

Research is a systematic and scientific process of collecting, analyzing, and interpreting information to answer questions, solve problems, and generate new knowledge. It serves as a fundamental tool for academic inquiry, policymaking, and evidence-based decision-making. The purpose of research may vary—from understanding basic concepts to addressing practical issues—and therefore, research is classified into several types. Broadly, research can be categorized as basic or applied, qualitative or quantitative, exploratory, descriptive, or explanatory, and experimental or non-experimental, each serving a unique objective within the research process. Along with identifying the type of research, selecting an appropriate sampling technique is essential for ensuring the validity and reliability of findings. Sampling techniques are generally divided into probability sampling (such as simple random, stratified, cluster, and systematic sampling), which provides every unit in the population a known chance of selection, and non-probability sampling (such as convenience, purposive, quota, and snowball sampling), which relies on researcher judgment or accessibility. Understanding the principles of sampling helps in obtaining a representative subset of the population, reducing cost, effort, and time while enhancing the accuracy of conclusions. Overall, a strong foundation in research concepts, types of research, and sampling techniques ensures high-quality studies and credible outcomes.

Keywords : Research, Investigation, Inquiry, Knowledge, Data Collection, Data Analysis, Hypothesis, Variables, Research Process, Scientific Method.

Paper Submission Last Date
31 - August - 2026

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