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Home Q & A Board Other Fields Homework Help Sociology
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fatos fatos
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6 years ago
To study the effects of aging, Professor Drake compares the reaction times of 60-year-olds with those of 30-year-olds. She tests all younger subjects in the morning, and all older subjects in the afternoon.
 
  She concludes that aging causes a decline in the speed of responses. This study lacks ________ because of potential ________.
  A) external validity; demand characteristics
  B) external validity; confounds
  C) internal validity; demand characteristics
  D) internal validity; confounds
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angelica7angelica7
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6 years ago
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fatos Author
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6 years ago
This helped my grade so much Perfect
Brownr40
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Yesterday
Thanks
taydav
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2 hours ago
Correct Slight Smile TY
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