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Definition
| sampling procedure done by where people live or work instead of who they are |
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Definition
| not representative, does not reflect population |
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Term
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Definition
| Unforeseen and uncontrolled events occurring over time to the participants during the study that are outside the control of the researcher and which may be responsible for changes in the participants. |
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Definition
| researcher takes most conveniently available cases |
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Term
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Definition
| Type of error that is a result from the accuracy of the measurement device or tool |
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Definition
| participants in study change over time due to natural developmental changes |
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Term
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Definition
| series of measurements taken from the same person or group of people over time |
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Term
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Definition
| large sample is followed over time, subgroups are compared based on exposure |
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Term
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Definition
| Patients with a disease, condition or exposure are enrolled with similar individuals without the condition or exposure and follow over time. |
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Definition
| results found under normal conditions |
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Term
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Definition
| results found under ideal conditions |
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Definition
| study of distribution and determinants of disease in a community |
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Term
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Definition
| several independent variables are manipulated concurrently |
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Term
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Definition
| In a study, subjects may be assigned to their groups using similar subjects to members of the other group. |
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Term
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Definition
| A type of experimental study in which measurements of the groups are taken only after an intervention has occurred. |
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Term
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Definition
| A type of experimental study in which measurements of the groups are taken both prior to and following an intervention. This allows the direct comparison of before and after the intervention. |
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