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Related Concept Videos

Convenience Sampling Method00:55

Convenience Sampling Method

Sampling is a technique to select a portion (or subset) of the larger population and study that portion (the sample) to gain information about the population. Data are the result of sampling from a population. The sampling method ensures that samples are drawn without bias and accurately represent the population.
Convenience sampling is a non-random method of sample selection; this method selects individuals that are easily accessible and may result in biased data. For example, a marketing...
Sampling Plans01:23

Sampling Plans

Sampling is a crucial step in analytical chemistry, allowing researchers to collect representative data from a large population. Common sampling methods include random, judgmental, systematic, stratified, and cluster sampling.
Random sampling is a method where each member of the population has an equal chance of being selected for the sample. It involves selecting individuals randomly, often using random number generators or lottery-type methods. For example, when analyzing the properties of a...
Systematic Sampling Method01:17

Systematic Sampling Method

Sampling is a technique to select a portion (or subset) of the larger population and study that portion (the sample) to gain information about the population. Data are the result of sampling from a population. The sampling method ensures that samples are drawn without bias and accurately represent the population. Because measuring the entire population in a study is not practical, researchers use samples to represent the population of interest.
Systematic sampling is one of the simplest methods...
Sampling Methods: Overview01:06

Sampling Methods: Overview

A sample refers to a smaller subset representative of a larger population. In analytical chemistry, studying or analyzing an entire population is often impractical or impossible. Therefore, samples are used to draw inferences and generalize the whole population. The sampling method selects individuals or items from a population to create a sample. Standard sampling methods include random, judgemental, systematic, stratified, and cluster sampling. 
In analytical chemistry, the choice of sampling...
Surveys02:16

Surveys

Often, psychologists develop surveys as a means of gathering data. Surveys are lists of questions to be answered by research participants, and can be delivered as paper-and-pencil questionnaires, administered electronically, or conducted verbally. Generally, the survey itself can be completed in a short time, and the ease of administering a survey makes it easy to collect data from a large number of people.
Random Sampling Method01:09

Random Sampling Method

Sampling is a technique to select a portion (or subset) of the larger population and study that portion (the sample) to gain information about the population. Data are the result of sampling from a population. The sampling method ensures that samples are drawn without bias and accurately represent the population. Because measuring the entire population in a study is not practical, researchers use samples to represent the population of interest. Among the various sampling methods used by...

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Related Experiment Video

Updated: Jun 7, 2026

Sampling Soils in a Heterogeneous Research Plot
07:11

Sampling Soils in a Heterogeneous Research Plot

Published on: January 7, 2019

Quota sampling in internet research: practical issues.

Eun-Ok Im1, Wonshik Chee

  • 1School of Nursing, The University of Texas at Austin, Austin, TX 78701, USA. eim@mail.nur.utexas.edu

Computers, Informatics, Nursing : CIN
|October 27, 2010
PubMed
Summary

Quota sampling effectively recruited midlife women for internet research but presented challenges. Practical issues included reaching lower socioeconomic groups and ensuring participant authenticity.

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Methods to Test Visual Attention Online
09:44

Methods to Test Visual Attention Online

Published on: February 19, 2015

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Last Updated: Jun 7, 2026

Sampling Soils in a Heterogeneous Research Plot
07:11

Sampling Soils in a Heterogeneous Research Plot

Published on: January 7, 2019

Methods to Test Visual Attention Online
09:44

Methods to Test Visual Attention Online

Published on: February 19, 2015

Area of Science:

  • Social Sciences
  • Health Research Methodology

Background:

  • Internet-based research offers unique opportunities but requires robust sampling methods.
  • Quota sampling is a proposed technique for internet studies, yet practical challenges remain underexplored.

Purpose of the Study:

  • To identify and discuss practical issues encountered when implementing quota sampling in an internet-based research study.
  • To provide insights into the real-world application of quota sampling in online research.

Main Methods:

  • Systematic recording of recruitment issues and their potential causes during an internet study.
  • Conducting biweekly team discussions with detailed record-keeping to analyze sampling challenges.

Main Results:

  • Quota sampling successfully recruited sufficient numbers of midlife women from target ethnic groups.
  • Identified challenges included difficulties reaching lower socioeconomic strata, verifying participant identity, and inconsistent responses.

Conclusions:

  • While effective for target group recruitment, quota sampling in internet research faces significant practical hurdles.
  • Addressing issues of socioeconomic accessibility, data integrity, and participant engagement is crucial for successful online quota sampling.