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
Biology Is Studied at Many Levels of Organization (Part 1)
Participants in the regatta at Genoa, Italy, are dwarfed by Paul Allen’s yacht.
Upper-Level Maps
Mendel’s observations about segregation and independent assortment are explained by the behavior ...
Independent assortment for two traits in humans follows the same pattern of inheritance as traits in
Levels of Organization