5989357
Description
Flashcards by Kyle Simpson, updated more than 1 year ago
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Created by Kyle Simpson
over 9 years ago
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| Question | Answer |
| Mrs. Haiti | Maturation Regression Selection History Attrition Instrumentation Testing Effects Interaction |
| Maturation | Change that occurs within subjects that may just be due to presence of time (Longitudinal - but not only) |
| Regression | Tendency for extreme scores to move (regress) closer to the mean or average score. |
| Selection | Who are the subjects? Are the comparison groups comparable? Minimize differences between groups using random sampling. What if you cannot randomly assign? Then it is not a 'pure' experiment (quasi-experiment) |
| History | Events in subjects life/environment, other than manipulated IV that occurs during the experiment and may effect outcome. |
| Attrition | Loss of subjects. Not a problem if even proportion are lost between groups (e.g. Differential attrition). Loss of subjects within subjects - problematic if there is something 'different' about the people that are leaving the study. |
| Instrumentation | Unwanted changes in characteristics of instrument/procedure |
| Testing Effects | e.g. The Hawthorne Effect |
| Interaction | Combination of any number of threats to internal validity. |
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