Research methods

  • Created by: bklxox
  • Created on: 01-06-15 07:59
A testable statement about the relationship between 2 variables (IV & DV)
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The variable the researcher changes
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The variable the researcher measures
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Method of research in which the IV & DV are controlled
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An experiment is organised into 2 trials, the performance of participant are compared
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Independent groups
Available people for the experiment. 1 group does 1 condition and other group does 2nd condition
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Repeated measures
1 group of participants take part in both conditions
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Matched pairs
Available people are tested before experiment and matched into pairs for qualities one member takes part in one condition and other in remaining condition. Identical twins are perfect for this
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+ & - of independent groups
+ no order effects . Same material can be used. Can't work out aim of experiment. . - different people in 2 conditions so different results. - need more people
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+&- of repeated measures
+ people in both conditions are the same so no participant variables, only need 10 people. - or elder effects , may work out aim of the study
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Matched pairs + & -
+ participant variables reduced no order effects same material used for both. - matching is difficult, time consuming and not always successful . Some participants present
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Standardised procedures
A set order of carrying out a study that applied to all participants when necessary
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Random allocation
A way of putting participants in conditions randomly
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A procedure of evening out the order in which participants complete both conditions
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Extraneous variable
Variable that is not the IV but might affect the DV
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Encouraging a person to participate in a study
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Standardised instructions
Instructions of what happens in the experiment
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Explains in detail
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Using chance to produce an order for procedure
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Ecological validity
The experiment can apply to real life behaviour. An accurate account of behaviour in the real world
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A small group of participants
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Target population
The large group of people the researcher wants to study
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The sample of participants is made up of people wi the same characteristics as the target population
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The results from the sample can be said to apply to the target population
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Random sample
Every member has equal chance of being selected for a study
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Opportunity sample
Members of the target population are available and willing to take part
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Systematic sample
Every nth number of population is selected for sample
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Stratified sample
Different sub groups in target population are identified
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Raw data
Scores collected in a study that haven't been analysed
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Adding up all values and divided by number there are
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Most frequently occurring number
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Middle value
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Lowest value take away from highest value
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Anomalous result
An extremely high or low score that doesn't match the other scores
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The variable the researcher changes

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