Answer:
A cultural region is defined by the common characteristics of the people living there. The people in a cultural region may speak the same language, practice the same religion, share the same customs, or live under the same government.
Explanation:
Answer: a. testing effect
Explanation:
Testing effect is a type of threat to internal validity of an experiment. Internal validity is assessing whether a factor makes a difference in an experiment or not and if it does, whether there is adequate evidence to support this correlation.
Testing as a threat to internal validity is when a second test is taken on the outcome of a first test. Other internal validity threats are history, maturation, instrument modifications.
