AS OCR Psychology- Research Methods

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  • Created on: 05-12-11 09:15
Preview of AS OCR Psychology- Research Methods

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AIM: What you are trying to find out- purpose of the study
HYPOTHESIS: A testable statement of what you expect to happen in the study
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EXPERIMENTAL HYPOTHESIS: Predicts there will be an effect- that something other than chance
alone has played a part in the results of the study.…read more

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DEMAND CHARACTERISTICS: Features that inform participants about the aim and can influence
their behaviour or results.…read more

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Easy to analyse Represents the complexity of human behaviour
Produces neat conclusions Provides rich detail
Oversimplifies reality More difficult to detect patterns and reach conclusions
Subjective, affected by personal expectations and beliefs
MEASURES OF MEAN Adds values, divide by Makes use of all data
CENTRAL number of values Can be misrepresentative of there
TENDENCY are extreme values
MEDIAN Middle value in an Not affected by extreme scores
ordered list
Not as "sensitive" as the mean
MODE The most common…read more

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Contain set of questions that contain both open and closed questions in which participants record
their answers.
When writing good questions, there are three important things to know:
Clarity: Questions need to be written so that the reader understands what is being
asked. One way to do this is operationalise (questions cannot be vague)
Avoid leading questions: Leading questions are phrased in a ways that it makes one
response more likely than the other (e.g. don't you agree that...…read more

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Also known as "likert scale".
It's where participants strongly agree or disagree with statements.…read more

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Weakness: Can be time consuming, difficult to sample randomly if you have a large target
Stratified sampling:
This involves dividing the target population into subcategories and then selecting members out of
this in the proportion they occur in the target population. For example, if a target population
consisted of 75% women and 25% men, a sample of 20 should include 15 women and 5 men.…read more

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There are two types of hypothesis: The experimental (alternative) hypothesis (H) and the null
hypothesis (H)
Experimental hypothesis:
This is the hypothesis that predicts there will be an effect- that something other than chance alone
has played a part in the results of the study.
There are two was of writing experimental hypothesis:
Directional hypothesis (ONE TAILED): Predicts the expected direction of the results-
can only go one way. For example, participants will perform better in the morning than
in the evening.…read more

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Difficult to debrief
Ethical issues- difficult to gain consent
3) QUASI/NATURAL: This is where the independent variable is not manipulated by the researcher
but occurs naturally. It is carried out to compare the effectiveness of the two different styles.…read more

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