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21 Cards in this Set
- Front
- Back
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What is the target population |
The particular group of people you are interested in studying. |
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What is opportunity sampling? |
Consists of taking the sample from people who are available at the time and fit your criteria |
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Strengths and weaknesses of opportunity sampling? |
Strengths- easy in terms of time and money. Weakness- May produce a biased sample, participants may decline to take part |
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What is a random sample? |
Every member of the population had an equal chance of being chosen |
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Strengths and weaknesses of random sampling? |
Strengths- unbiased representation of the target population. Weaknesses- Time consuming and often impossible to carry out. |
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What is Self selected sampling |
Get participants by them volunteering when asked or in response to an advert |
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Advantages and disadvantages of self selected sampling? |
Advantages- quick and easy to do Disadvantages- May not be representative of the target population as may be more motivated to take part. |
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What is a lab experiment? |
Special environment where variables can be carefully controlled |
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What is a field experiment? |
Conducted in a natural environment |
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What is a natural/quasi experiment? |
Naturally occurring IV that cannot be manipulated. |
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What is an independent measures design? |
Different group of participants for each condition of the IV. |
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What is a repeated measures design? |
Each participant completes each condition. |
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What is a marched pairs design? |
Match participants so you can control specific characteristics that you think might influence the results. |
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What is ordinal data? |
Involves numbers that can be put into order. |
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What is nominal data? |
Numbers collected represent how many people have picked a specific category. |
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What is interval data? |
Ordinal data with a set unit |
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P=0.05 |
There is a 5% probability that the differences in the two sets of scores occurred due to chance factors. There is a 95% probability that the results occurred due to a real difference between the two conditions. |
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What is p<0.05 |
There is a less than 5% probability that the differences in the two sets of scores occured due to chance factors. There is a more than 95% probability that the results occured due to a real difference between the two conditions. |
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What is a wilcoxon signed ranks test? |
Used when you are looking for a difference between two conditions. Ordinal data and repeated measures. |
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What is Mann- Whitney U test? |
Looking for a difference between two conditions. Ordinal data independent measures. |
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What is a spearman's tho rank correlation coefficient? |
Test of correlation. Ordinal data. |
