Have you ever played a video game breaking the all-time high score only to find that you were never ...

Have you ever played a video game breaking the all-time high score only to find that you were never able to duplicate that performance? This is an example of _________, which is a threat to internal validity.
 
  a. history
  b. maturation
  c. regression to the mean
  d. selection

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PsycINFO is the second largest research database in psychology.
 
  Indicate whether the statement is true or false

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The most common type of reliability assessment is test-retest.
 
  Indicate whether the statement is true or false

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After analyzing her data, Faith has found that her power level for her analyses is .80 . Faith's power is considered to be .
 
  a. low
  b. adequate
  c. very low
  d. extremely high

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All independent variables will have at least three levels or conditions.
 
  Indicate whether the statement is true or false