levo

Scientific Processes

Sampling

  • 3 things to know
  • Paper 2

Overview

Random, stratified, systematic, opportunity and volunteer sampling, how each sample is drawn, and the bias each one carries.

What you need to know

Answer each one before you reveal it.

Your recallNot started
Key term

What is random sampling, and what limits its use?

Process

Describe how a stratified sample is put together.

Key term

Describe systematic, opportunity and volunteer sampling, and the bias each carries.

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What is a population in psychological research?

    Model answer

    The entire group of individuals that a researcher is interested in studying and drawing conclusions about.

  2. 2

    Define what is meant by a sample in research.

    Model answer

    A subset of individuals selected from the population to participate in a study.

  3. 3

    How does a sample differ from a population?

    Model answer

    The population is the entire target group the researcher wants to generalise findings to, while the sample is the smaller group actually studied.

  4. 4

    What is random sampling?

    Model answer

    A method where every member of the target population has an equal chance of being selected for the sample.

  5. 5

    Define systematic sampling.

    Model answer

    Selecting participants at regular intervals from a list of the target population.

  6. 6

    What is the first step in stratified sampling?

    Model answer

    Identify relevant subgroups in the population.

Other ways to work this

The same content, four other ways.

What is inside Levo

Six ways to work the same material.

1Closed book
2Open book
3Closed book

The 3-step method, run for you

Answer cold, learn it, then prove it stuck. Levo tracks the jump between your first attempt and your last.

Social Influence
Memory
Attachment
Approaches in Psychology

Cram a whole paper in one sitting

Sort every topic into what you know and what you do not, then drill only the weak ones.

The stage comes second.
pre-operationalsensorimotorconcrete

Blank Blitz makes facts automatic

Rapid timed gap-fills on the terms and numbers you need to recall without thinking.

AThe mean is the arithmetic average of a data set.
BEvery value in the set is added together.
CThe total is divided by the number of values.

Build It gets the exam shape right

Assemble a full-mark answer from its marking points, in the order an examiner wants them.

Imitation means copying the behaviour of a model.
TrueFalse

Test It catches misconceptions

Spot the fault in a statement. The traps are the mistakes students actually make.

721941163128510

Brain Breaks between sessions

Short focus games to reset attention, so the next set lands better than the last.

Every question in Scientific Processes, on a schedule.

Attempt a question from memory, write the correct version, then attempt it again. Levo records the jump between your first attempt and your last, and brings each question back on the day you are due to forget it.

Or £46 a year, about £3.83 a month. Cancel anytime.