Which of the following statements represent a major difference between experimental methods and descriptive methods?
a. Experimental methods do not involve manipulation of variables.
b. Experimental methods do not involve controlling potential third variables.
c. Experimental methods allow for identification of cause and effect.
d. Both experimental methods do not involve manipulation of variables and experimental methods do not involve controlling potential third variables.
Question 2
Field experiments are considered to be high in which of the following?
a. Internal validity
b. External validity
c. Internal validity and reliability
d. Neither internal or external validity
The two major categories of postsynaptic receptors.
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