If a group of potential participants is tested so those scoring poorly can be selected for participation in a program to raise test scores, the selected group may show higher scores after engaging in the program.
There would be a threat to internal validity here. It would be
a. selection.
b. maturation.
c. statistical regression.
d. history.
Question 2
If research participants are assessed with a particular questionnaire early in a study, but the researchers change the questions for later assessment so participants can't simply repeat answers,
what potential thread to internal validity would be at work here?
a. instrumentation.
b. testing.
c. selection.
d. history.
Conduction of the Action Potential
Specific Drugs and their Potential for Dependence
Calcium channels and muscle contraction: (a) Calcium channels open as the action potential travels ...
A vehicle being tested during an enhanced emissions test.
Action Potential in a Ventricular Fiber
Estimated New Cases of Selected Cancers in the USA, 2012