If more participants drop out of one of the levels of your independent variable than a second level, you may have a problem with mortality as a threat to internal validity.
Indicate whether the statement is true or false
Question 2
Suppose you have two levels of your independent variable and you assign participants to the levels by asking them to volunteer for one of the levels, the threat to external validity that you should be most concerned with is maturation.
Indicate whether the statement is true or false
The burning of fossil fuels has greatly increased atmospheric CO2 levels and temperatures.
Summation of Heart Sounds, Variable S1
Acute Stress, Glucocorticoid Level, Synaptic Plasticity, and Learning
Negative feedback control of a regulated variable.
Phrases that Decrease Customer Service Level
Checking the freezing and boiling protection levels of the coolant using a hydrometer.