PSY2 – Research Methods: Lesson 17

Sampling

PSY2 RM PowerpointTeachers or students who want the original PPT please tweet @psychopepper

Learning Objectives

  • To KNOW and UNDERSTAND the different types of sampling techniques.
  • To ANALYSE how to gather the different samples using each technique.
  • To EVALUATE each sampling technique.

Lesson Outline:

Tasks:

  1. Discuss the practical need for sampling considerations.
  2. Teacher to demonstrate the sampling techniques using grassheads or sweets.
  3. Complete a card sort of all sampling techniques.  Stage One: What they are and how to conduct them. Stage Two: Strengths and Limitations.
  4. Complete a “hard” concepts test of ten concepts covered so far, teacher reads out the concept and you define it.
  5. To take notes in booklet on the sampling techniques
  6. To plan a sampling demonstration of your own.

Content Recap:

Target Population: is the total group of individuals from which the sample might be drawn.
Generalisability: refers to the extent to which we can apply the findings of our research to the target population we are interested in.

Random Sampling: all members of the target population have an equal chance of being selected.  The strengths of this technique are it is free from researcher bias.  However it’s limitations are that it can be difficult, time consuming, may not be representative and selected people may refuse to participate.

Opportunity Sampling: selecting participants who are easily available at the time.. The strengths of this technique is its convenience.  However it’s limitations are that it will have researcher bias and will not be representative, in addition selected people may refuse to participate.

Stratified Sampling: composition of the sample reflects the proportions of people in certain sub-groups (strata) within the target or wider population. The strengths of this technique are it is free from researcher bias and most likely to be representative.  However it’s limitations are that it can be difficult, time consuming, and selected people may refuse to participate.

Systematic Sampling: every nth member of the target population is selected The strengths of this technique are it is free from researcher bias.  However it’s limitations are that it may not be representative and selected people may refuse to participate.

Volunteer Sampling: participants self-select to be part of the sample. The strengths of this technique are its ease and guarantee people wish to take part.  However it’s limitations are that it will not be representative due to volunteer bias.

If you would like to access PsychoPepper’s Glossary of Terms please click here

Resources Used:

Card Sort

Study Notes (TBC):

If you would like to download a set of study notes for this lesson, you can do so here. If you would like access to the original word file please tweet @psychopepper

TEXTBOOKS OR EXTRA READING:

I would suggest that you have a copy of one of the textbooks which will allow you to read around the subject matter, pre-read ahead of lessons or even take extra notes/practise questions afterwards. I would recommend the following (you do not need to replicate books, one of each type is plenty!)

Extra ReadingElephants on Acid or Hippo Eats Dwarf

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