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Author Question: Bell et al. (2000) found that people who are more physically fit suffer athletic injuries less often ... (Read 69 times)

plus1

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on: Jun 20, 2018
Bell et al. (2000) found that people who are more physically fit suffer athletic injuries less often than people who are less fit. This threat to internal validity that keeps us from concluding that fitness is a causal variable is
 
  a. selection.
  b. maturation.
  c. statistical regression.
  d. history.

Question 2

Many decades ago, psychologists discovered that comparisons of young and old people revealed that cognitive functioning declined in old age when cross-sectional research was used. The same result did not appear with longitudinal research.
 
  The problem here is that the results in the cross-sectional research were affected by
  a. cohort effects.
  b. baseline effects.
  c. wave effects.
  d. trend effects.


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alexanderhamilton

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Reply #1 on: Jun 20, 2018
Answer to Question 1

A

Answer to Question 2

A


plus1

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Reply #2 on: Jun 20, 2018
Thank you


alexanderhamilton

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Reply #3 on: Jun 20, 2018
No problem :)


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