Investigating Behaviour

  • Created by: chloe
  • Created on: 30-05-13 19:38
What is a variable?
Anything is open to variation in a research. eg time of day
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What is the independent variable?
The key factor in the research, the cause in cause and effect
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What is the dependent variable?
The thing that changes as a result of the research manipulation the IV
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What is a hypothesis?
A written statement of what the researcher expects to happen as a result of their investigation
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What is a one tailed hypothesis?
Predicts the nature or direction of the effect of the IV on the DV
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What is a two tailed hypothesis?
Predicts that a change in the IV will have an effect on the DV but does not predict a direction
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What is a sample?
A group of people from the population which we use in our research. 'participants'
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What is a random sample?
When every person in the population has an equal chance of being picked, they are selected by a computer program or names are drawn from a hat. However this is difficult to get all of the population in.
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What is an opportunity sample?
Whoever is willing and available takes part. These samples are no usually representative as certain groups of the population will not take part
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What is a volunteer sample?
When people answer an advert. Not representative as volunteers could be influenced by demand characteristics making the results biased
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What are the advantages of an experiment?
Cause and effect relationship - a change in the IV will cause a change in the DV. Replication - controlling variables allows the experiment to be repeated. Quantitative Data - which is east to analyse.
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What are the disadvantages of an experiment?
Demand characteristics - people may give socially acceptable answers. Experimenter Bias. Lab experiments have low ecological validity.
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What is a lab experiment?
The only true experiment. High level of control - manipulating the IV and eliminating other variables. Study can be replicated. Cause and effect relationship between the DV and the IV. However it is highly artificial, and demand characteristics
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Other cards in this set

Card 2

Front

What is the independent variable?

Back

The key factor in the research, the cause in cause and effect

Card 3

Front

What is the dependent variable?

Back

Preview of the front of card 3

Card 4

Front

What is a hypothesis?

Back

Preview of the front of card 4

Card 5

Front

What is a one tailed hypothesis?

Back

Preview of the front of card 5
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