Term
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Definition
When a study does a good job of controlling for extraneous variables
on the dependant variable (DV). |
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Term
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Definition
The ablility to generalize the study results
to other groups &
settings beyond the experiement. |
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Term
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Definition
INTERNAL
When an event occurs between the pre & post test (other than DV) that could affect the DV
USE A CONTROL GROUP THAT IS
NOT EXPOSED TO THE DV |
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Term
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Definition
INTERNAL
Changes that occur to the subjs. due to the passing of time not b/c of program effects
USE OF A CONTROL GROUP |
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Term
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Definition
INTERNAL
Subjs. may learn better how to perform on the post-test when they are given a pretest
USE A CONTROL GROUP THAT DOES NOT TAKE A PRETEST & THEN COMPARE |
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Term
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Definition
INTERNAL
Instruments that fail to be precise enough or do not measure what they are intended to measure
USE WELL DESIGNED INSRTUMENTS THAT HAVE BEEN PRE-TESTED (i.e. pilot study)
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Term
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Definition
INTERNAL
Subjs. selected in a non-random
manner differ in some way
DON'T USE INTACT GROUPS
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Term
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Definition
INTERNAL
Scores are extremely high or low
regression to the mean
USE RANDOM SAMPLE RATHER THAN HIGH & LOW GROUPS BASED ON 1 TEST |
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Term
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Definition
INTERNAL
Subjs. lost b/c they drop out
of the study & can't be found
USE LARGE N, INCENTIVES, OVERSAMPLE |
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Term
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Definition
INTERNAL
Altered behavior caused by being observed
CONTROL GROUP BY OMITTING INFO OF WHAT IS BEING OBSERVED |
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Term
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Definition
INTERNAL
Altered behavior due to expectations
CONTROL GROUP- EVERYONE BELEIVES THEY R RECEIVING TX |
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Term
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Definition
INTERNAL
Tx of the experimental group spills over to
comparison or control group
CONRTOL GROUP THAT IS AWAY FROM THE EXPERIMENTAL GROUP |
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Term
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Definition
INTERNAL
The location of the program/data collection
affects subj responses
MAKE LOCATION = 4 ALL OR TRY TO MINIMIZE DIFFERENCES |
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Term
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Definition
INTERNAL
Differences in persons presenting
a program affect the program
SOMEONE OTHER THAN THE RESEARCHER PRESENTS THE PROGRAM, NEUTRAL OBSERVER |
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Term
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Definition
EXTERNAL
Occurs when the results of a study are overgeneralized to another group
DON'T OVERGENERIZED RESULTS TO ANOTHER GROUP |
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Term
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Definition
EXTERNAL
The ability that environmental conditions/settings of an experiment can b replicated in other settings
ENSURE SIMILARITIES AMONG GROUPS BEING COMPARED |
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Term
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Definition
EXTERNAL
Occurs when generalizing findings to past & future situations
B AWARE OF TIMING OF RESEARCH & EFFECTS IT MAY HAVE ON SUBJS |
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