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Sampling summary

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Quick summary of sampling in Psychology that I have been taught, really good for making flashcards or any other sort of revision you may need for your A levels.

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Sampling

The process of selecting a representative group from the population.

Target population: Large group of people that the researcher is interested in studying.

Sample: A small group of people collected from the target population to take part in the study.

E.g All men in the UK → Born in London → 500 volunteers.


Types of sampling

RANDOM
Every member of the population has a chance of being selected. HOW? Random technique, all
participants' names drawn into a hat and are randomly picked out.

STRENGTHS
Unbiased - equal chance of selection

LIMITATIONS
Time consuming - need all lists of names and then contact the ones selected.


SYSTEMATIC
Selecting every Nth person using a predetermined system. E.g every 5th person from a
phonebook system.

STRENGTHS
Unbiased - objective system

LIMITATIONS
Not truly unbiased, not everyone selected will agree to take part.


STRATIFIED
Participants are selected according to frequency in population. HOW? Subgroups or strata
identified (boys/girls).

STRENGTHS
More representative - proportional to target population

LIMITATIONS
Time consuming - identifying subgroups then randomly select

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Subject
Psychology
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July 5, 2023
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2022/2023
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Summary
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Subjects

  • sampling
  • random
  • stratified
  • volunteer
  • opportunity
  • systematic

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