Of the following philosophical assumptions, which one concerns the extent to which a person's personality is inborn and determined by genetic factors?

Every person is genetically unique, with the exception of ______ twins, triplets, quadruplets, and so on

Fill in the blank with correct word

A __________ is a historical event that occurs in the midst of a longitudinal study that might

alter the study results in unintended ways. Fill in the blanks with correct word