Lesson 4: Non Probability Sampling

Question 1

is a process of selecting a group of individuals who (conveniently) are available for study.
- because participants can be selected for the sample simply because they happen to be nearby then the researcher is conducting the data collection.

Answer 1

Convenience Sampling/Accidental Samples

Question 2

is a process of selecting based on judgment to select a sample which the researcher believed based on prior information, will provide the data they need.
- because it relies on the judgment of the researcher to select the units (e.g., people, cases, or organizations studied.)

Answer 2

Purposive Sampling/Judgmental Sampling

Question 3

What are the 3 Subcategories of Purposive Sampling

Answer 3

1. Modal Instance Sampling/Homogeneous Sampling
2. Expert Sampling
3. Quotations Sampling/Dimension Sampling

Question 4

It aims to get a sample of people who have similar or identical traits.

• For example, they might share the same views, beliefs, age, location, or employment.

Answer 4

Modal Instance Sampling/Homogenous Sampling

Question 5

involves selecting a sample based on demonstrable experience, knowledge, or expertise of participants.

• This expertise may be a good way to compensate for a lack of observational evidence or to gather information during the exploratory phase of your research.

Answer 5

Expert Sampling

Question 6

It relies on the non-random selection of a predetermined number or proportion of units.
- In this method, the population is split into segments (strata), and you must fill a quota based on people who match the characteristics of each stratum.

Answer 6

Quota Sampling

Question 7

What are the 2 Types of Quota Sampling

Answer 7

1. Proportional Quota Sampling
2. Non-Proportional Quota Sampling

Question 8

is used when the size of the population is known.

This allows you to determine the quota of individuals that you need to include in your sample in order to be representative of your population.

Answer 8

Proportional Quota Sampling

Question 9

Is used when the size of the population is unknown.

Here, it’s up to you to determine the quota of individuals that you are going to include in your sample in advance.

Answer 9

Non-proportional Quota Sampling

Question 10

Involves selecting candidates across a broad spectrum relating to the topic of study.

• This helps you capture a wide range of perspectives and identifies common themes
evident across the sample. It is also called

Answer 10

Heterogeneous Sampling/Maximum Variation Sampling

Question 11

Is used when the population you want to research is hard to reach, or there is no existing database or other sampling frame to help you find them.

Research about socially marginalized groups such as drug addicts, homeless people, or sex
workers

• you start by finding one person who is willing to participate in your research. You then ask them to introduce you to others.

Answer 11

Snowball Sampling

Question 12

What are the 4 Types of Non-probability Sampling

Answer 12

1. Convenience Sampling
2. Purposive Sampling
3. Heterogeneous Sampling
4. Snowball Sampling