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Sampling Plans

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...

Surveys

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.

Convenience Sampling Method

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...

Case Studies

Case Studies

There are many research methods available to psychologists in their efforts to understand, describe, and explain behavior and the cognitive and biological processes that underlie it.

Group Design

Group Design

The most basic experimental design involves two groups: the experimental group and the control group. The two groups are designed to be the same except for one difference— experimental manipulation. The experimental group gets the experimental manipulation—that is, the treatment or variable being tested—and the control group does not. Since experimental manipulation is the only difference between the experimental and control groups, we can be sure that any differences between the two are due to...

Naturalistic Observations

Naturalistic Observations

If you want to understand how behavior occurs, one of the best ways to gain information is to simply observe the behavior in its natural context. However, people might change their behavior in unexpected ways if they know they are being observed. How do researchers obtain accurate information when people tend to hide their natural behavior? As an example, imagine that your professor asks everyone in your class to raise their hand if they always wash their hands after using the restroom. Chances...

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Related Experiment Video

Updated: Jun 3, 2026

A Modified Trier Social Stress Test for Vulnerable Mexican American Adolescents

A Modified Trier Social Stress Test for Vulnerable Mexican American Adolescents

Published on: July 10, 2017

Sampling challenges in a study examining refugee resettlement.

Cheryl Mr Sulaiman-Hill¹, Sandra C Thompson

¹Centre for International Health, Curtin University, GPO Box U1987, Perth, Western Australia, Australia. tabuk@actrix.co.nz.

BMC International Health and Human Rights

|March 17, 2011

Summary

This summary is machine-generated.

This study highlights the effectiveness of snowball sampling for recruiting socially invisible refugee groups, crucial for understanding their resettlement needs and improving research methodologies.

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Area of Science:

Sociology
Public Health
Migration Studies

Background:

Refugee populations, particularly from Afghanistan and Iraq, require research into resettlement needs.
Culturally and linguistically diverse groups present unique methodological challenges in research.
Socially invisible refugee groups are often underrepresented in studies.

Purpose of the Study:

To outline challenges in sampling and recruiting socially invisible refugee groups.
To describe a mixed-methods approach for studying Afghan and Kurdish refugees in New Zealand and Australia.
To assess mental health, well-being, and resettlement perspectives of refugee populations.

Main Methods:

A snowball sampling strategy with multiple entry points was employed.
This aimed to maximize participant diversity and minimize selection bias.
Census data was utilized to evaluate sample representativeness.

Main Results:

193 former refugees (47% Afghan, 53% Kurdish) were recruited from Christchurch and Perth.
The sampling method achieved a balanced gender distribution (52% male, 48% female).
Demographic variations reflected different national humanitarian intake policies and refugee experiences.

Conclusions:

Snowball sampling with multiple initiation points proved essential for accessing and engaging refugee participants.
Personal contact and interviewer cultural sensitivity were vital for recruitment and data quality.
Cross-national refugee resettlement studies must account for pre-migration experiences and time since arrival.