Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Qualitative Analysis01:10

Qualitative Analysis

1.1K
Qualitative analysis is the process of identifying elements, ions, or compounds in an unknown sample. It is the first and most fundamental type of analysis based on the hierarchy of analytical goals. This hierarchy is significant as it provides a structured approach to scientific research, with qualitative analysis serving as the initial step, providing essential information before moving on to quantitative or other forms of analysis.
There are two main approaches to qualitative analysis:...
1.1K
Qualitative Analysis03:46

Qualitative Analysis

23.4K
For solutions containing mixtures of different cations, the identity of each cation can be determined by qualitative analysis. This technique involves a series of selective precipitations with different chemical reagents, each reaction producing a characteristic precipitate for a specific group of cations. Metal ions within a group are further separated by varying the pH, heating the mixture to redissolve a precipitate, or adding other reagents to form complex ions.
For instance, group IV...
23.4K
Sampling Methods: Overview01:06

Sampling Methods: Overview

1.2K
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...
1.2K
Sampling Methods: Sample Types01:18

Sampling Methods: Sample Types

1.1K
Sampling materials are classified into three main types: solid, liquid, and gas.
Solid samples include a variety of substances, such as sediments from water bodies, soil, metals, and biological tissues. Two standard methods for extracting sediments from water bodies are grab sampling and piston coring. Grab sampling involves using a device to collect a discrete sediment sample from the bottom of a water body with minimal disturbance. Grab samples do not always represent the entire area due to...
1.1K
Sampling Plans01:23

Sampling Plans

760
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...
760
Convenience Sampling Method00:55

Convenience Sampling Method

10.7K
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...
10.7K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Abuse and Disrespect in Obstetric Care in the United States: A Qualitative Descriptive Study of Nurse Experiences.

Birth (Berkeley, Calif.)·2025
Same author

About Research - Qualitative Data Collection: Photo Elicitation.

Journal of human lactation : official journal of International Lactation Consultant Association·2024
Same author

What Am I Going to Feed My Baby?

Journal of human lactation : official journal of International Lactation Consultant Association·2022
Same journal

Knowledge and Acceptability Towards Human Milk Bank Use Among Women Attending Haydom Lutheran Hospital, Tanzania.

Journal of human lactation : official journal of International Lactation Consultant Association·2026
Same journal

Psychometric Evaluation of the Turkish Version of a Breastfeeding Support Self-Efficacy Scale for Midwifery Students.

Journal of human lactation : official journal of International Lactation Consultant Association·2026
Same journal

Breastfeeding Knowledge, Attitudes, and Practices Among Young Mothers in South Korea: A Cross-Sectional Study.

Journal of human lactation : official journal of International Lactation Consultant Association·2026
Same journal

Is "Nurse" Necessary? Questioning Redundancies in Breastfeeding Research Searches.

Journal of human lactation : official journal of International Lactation Consultant Association·2026
Same journal

Developing Croatia's National Policy on Infant and Young Child Feeding in Emergencies: From Global Guidance to National Action.

Journal of human lactation : official journal of International Lactation Consultant Association·2026
Same journal

In-Depth Breastfeeding Training for Healthcare Professionals: A Systematic Review.

Journal of human lactation : official journal of International Lactation Consultant Association·2026
See all related articles

Related Experiment Video

Updated: Dec 11, 2025

Enactive Phenomenological Approach to the Trier Social Stress Test: A Mixed Methods Point of View
05:26

Enactive Phenomenological Approach to the Trier Social Stress Test: A Mixed Methods Point of View

Published on: January 7, 2019

7.1K

Qualitative Sampling Methods.

Sara L Gill1

  • 114742 School of Nursing, University of Texas Health Science Center, San Antonio, TX, USA.

Journal of Human Lactation : Official Journal of International Lactation Consultant Association
|August 20, 2020
PubMed
Summary
This summary is machine-generated.

Understanding qualitative sampling methods is crucial for rigorous qualitative research. This study outlines appropriate techniques, discussing their pros, cons, sample size, and data saturation.

Keywords:
breastfeedingqualitative methodssamplingsampling methods

More Related Videos

VacuSIP, an Improved InEx Method for In Situ Measurement of Particulate and Dissolved Compounds Processed by Active Suspension Feeders
08:57

VacuSIP, an Improved InEx Method for In Situ Measurement of Particulate and Dissolved Compounds Processed by Active Suspension Feeders

Published on: August 3, 2016

11.3K
Methods of Soil Resampling to Monitor Changes in the Chemical Concentrations of Forest Soils
09:16

Methods of Soil Resampling to Monitor Changes in the Chemical Concentrations of Forest Soils

Published on: November 25, 2016

17.2K

Related Experiment Videos

Last Updated: Dec 11, 2025

Enactive Phenomenological Approach to the Trier Social Stress Test: A Mixed Methods Point of View
05:26

Enactive Phenomenological Approach to the Trier Social Stress Test: A Mixed Methods Point of View

Published on: January 7, 2019

7.1K
VacuSIP, an Improved InEx Method for In Situ Measurement of Particulate and Dissolved Compounds Processed by Active Suspension Feeders
08:57

VacuSIP, an Improved InEx Method for In Situ Measurement of Particulate and Dissolved Compounds Processed by Active Suspension Feeders

Published on: August 3, 2016

11.3K
Methods of Soil Resampling to Monitor Changes in the Chemical Concentrations of Forest Soils
09:16

Methods of Soil Resampling to Monitor Changes in the Chemical Concentrations of Forest Soils

Published on: November 25, 2016

17.2K

Area of Science:

  • Social Sciences
  • Health Sciences
  • Education

Background:

  • Qualitative and quantitative sampling methods possess distinct characteristics.
  • A clear understanding of these differences is essential for researchers.
  • Recognizing appropriate qualitative sampling techniques is vital for study design.

Purpose of the Study:

  • To elucidate the differences between qualitative and quantitative sampling.
  • To present appropriate qualitative sampling strategies for research.
  • To discuss the advantages and disadvantages of various qualitative sampling techniques.

Main Methods:

  • Review and synthesis of established qualitative sampling methodologies.
  • Discussion of theoretical underpinnings of sampling in qualitative research.
  • Exploration of practical considerations including sample size and data saturation.

Main Results:

  • Qualitative sampling focuses on depth and context, unlike quantitative sampling's breadth.
  • Various techniques like purposive, snowball, and convenience sampling offer different research benefits.
  • Each method presents unique advantages and limitations impacting study rigor.

Conclusions:

  • Appropriate selection of qualitative sampling methods significantly enhances research rigor.
  • Consideration of sample size and data saturation is critical for achieving reliable qualitative findings.
  • Researchers must carefully choose sampling strategies aligned with their study objectives.