If one of your parents has Huntington's disease, the probability that you will develop it is __________ %

The meaning of an IQ score varies with the particular intelligence test on which it is determined

Indicate whether the statement is true or false

Researchers in personality often use a type of field study in which they are not able to randomly assign subjects to particular conditions, but use groups as they find them in real life. These types of studies are called _______________

Fill in the blank(s) with the appropriate word(s).