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Definition
| Invovles the ability to generalize study results to other groups and settings beyond beyond those in th ecurrent study. |
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| the extent to which th eobserved effects of the independnet variable on the dependnet variable are real and not caused by extraneous factors. |
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| Threats to Intenal Validity |
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Definition
| Any aspect of a study that causes one to question if the results are true and accurate. |
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| Research conducted in the tightly structured conditions of a lab |
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| The diffusion Effect occurs whenthe treatment being applied to one group spills over to or contaminates another group. |
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Definition
| The Maturation Effect is the set of changes seen in subjects are a result of the time tha has elapsed since the study began and not any program effects. |
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| Implementation Effect is a threat to internal validity that occurs when those responsible for implementing the experimental treatment inadvertently introduce inequality or bias into the study. |
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Definition
| Concerned with whether the instrument "actually does measure the underlying attribute or not" (Bowling, 2005). |
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Definition
| Placebeo Effect is the differences caused by participants expectations instead of any provided treatment. |
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Definition
| the Hawthorne Effect occurs when participants' attitudes toward being involved in a study affects the wat they behave. |
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Definition
| A measurement that is taken to obtain the status or level of a variable prior to initiating a study |
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Term
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Definition
| Is the threat to validity from an attrition of study participants. |
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Term
| Selection Maturation Effect |
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Definition
| Threat to validity that occurs whenintact groups are used and the groups vary ontheir maturation level. |
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Term
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Definition
| History Effect occurs outside of a research study between the pretest and posttest that could affect participants in such a way as to have an impact on the dependent variable. |
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Term
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Definition
| Location Effect occurs when there are differences in the location where intervention take place. |
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Term
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Definition
| A study where the individuals invovled in the study do not know theyare receiving the treatment or the placebo. |
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Term
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Definition
| The combined effect, or the interaction, of two or more independent variables on a dependent variable. |
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