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
Older participants remember more information than younger participants when material has emotional ...
Voltmeter hook-ups for voltage-drop testing of a Ford-type cranking circuit.
Variable Gases: Water Vapor
Drop Dead Healthy
Keeping your feelings to yourself may increase your stress level
Animated Changes in the ovary and uterus correlated with changing hormone levels. We start with the