Quantitative

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What is a within subjects design?
ppts take part in both levels (repeated measures)
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What is a between subjects design?
ppts are assigned to one level of the IV (independent measures)
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What are the 3 drawbacks of a BS design?
1) more ppts needed to get power for meaningful stats 2) group differences 3) may be problems interpreting results if groups are treated 'differently'
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What is the main drawback of within subjects design?
Order effects
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How can order effects be resolved?
Counterbalancing
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What is a sample?
individuals participating in a study
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What is a population?
the wider group about which you wish to learn
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What is sampling?
A method to select a study population (sample) that approximates a specific larger population that you aim to make inferences about
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What is probability sampling?
Using methods to ensure that sample is representative of the population we want to infer about.
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What is non-probability (random sampling)
A sample that is not structured to approximate population.
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What are two types of probability sampling?
1) Random sampling 2) Stratified random sampling
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What is random sampling?
Every member of the population has an equal chance of being selected for participation but it does not account for population characteristics
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What is stratified random sampling?
Selecting a sample that matches important population characteristics
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What is opportunity/available sampling?
The 'take-whoever-comes-along' approach
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What is quantitative data?
data obtained by assigning numbers to events or objects in a systematic way
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What is categorical data?
Unordered (nominal) vs ordered (ordinal)
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What is continuous data?
Interval/ratio data
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What is nominal data?
the use of numbers as names for the category that an object or event belongs to
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What is ordinal data?
the size of the number does represent something about the quantity of whatever is being measured - numbers only used to place objects in order
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What is interval data?
The differences between the numbers are equal. and that indicates that there are equal differences in whatever is being measured.
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What is ratio data?
Has a true zero point, where ratios between numbers are meaningful.
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What is a histogram?
A special bar chart for continuous variables to see the shape of a data distribution.
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What is a histogram bin size?
The number of categories (bins) determines the number of bars in a histogram.
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Other cards in this set

Card 2

Front

What is a between subjects design?

Back

ppts are assigned to one level of the IV (independent measures)

Card 3

Front

What are the 3 drawbacks of a BS design?

Back

Preview of the front of card 3

Card 4

Front

What is the main drawback of within subjects design?

Back

Preview of the front of card 4

Card 5

Front

How can order effects be resolved?

Back

Preview of the front of card 5
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