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Home Q & A Board Science-Related Homework Help Psychology
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Bisla Bisla
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9 years ago
The threat to internal validity associated with differences between pre-existing groups when participants are not randomly assigned is
a.  history.
b.  maturation.
c.  statistical regression.
d. selection.
Textbook 
Introduction to Behavioral Research Methods

Introduction to Behavioral Research Methods


Edition: 6th
Author:
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sulmaeatersulmaeater
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9 years ago
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Bisla Author
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#2
9 years ago
I was curious about this one, thanks for steering me in the right direction.
wrote...
#3
9 years ago
My pleasure.
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