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17 Cards in this Set
- Front
- Back
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What is meta-analysis? |
When a rsearcher looks at the findings from a number of different studies and produced a stat to represent the overall effect. |
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What is content analysis? |
A kind of observational study which doesn't collect data directly from people. The study of recorded communications. |
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What us adisadvantage if meta analysis? |
Research designs may differ in different studies which means studies may not be comparable |
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What is a limitation of content analysis? |
Observer bias, observers may interpret things differently to other people |
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What is the sign test? |
A statistical test to determine thecsignificance of a sample of related items of data. |
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When do you use the sign test? |
Can be used with both repeated measures and matches pairs design |
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What type of hypothesis is a one-tailed test used for? |
A directional hypothesis |
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What is a directional hypothesis? |
A hypothesis which states change is going to happen |
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When is a two-tailed test used? |
When a hypothesis is non-directional |
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What us nominal data? |
Categorical or qualititaive, e.g. preceded type of chocolate. No order. Females are 1 and females are 2. No order or neaning. |
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What is ordinal? |
Have an equal order but the length of intervals between the items may not be equal. E.g. running times in a race. E.g. place someone finshes in a race 1st 2nd 3rd 4th |
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What us interval? |
Numbers have order. (Like ordinal) but there are also equal intervals between adjacent categories. |
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What is a parametric test? |
A test which makes assumptions about the parameters (properties) of the population distribution. A branch of statistics which assumes that data comes from a population that follows a probability distribution based on a fixed set of parameters |
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A non parametric test makes no assumptions |
Y |
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What parametric data? |
A mean and standard deviation |
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Parametric: if you know the mean and stabdard deviation you can predict the probability of future observation |
T |
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What is a disadvantage of parametric stats? |
It isn't always right because it is based on assumptions, this means it is less valid. However when it is right is is more accurate than non-paratemtric tests |
