Author Question: When subjects act differently because they are aware that they are in an experiment, this is called ... (Read 58 times)

plus1

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When subjects act differently because they are aware that they are in an experiment, this is called the _____.
 a. history effect
  b. Hawthorne effect
  c. maturation effect
  d. Likert effect

Question 2

What increasingly common web feature uses a Heckman model to correct of massive amounts of missing data, parameter heterogeneity, and Bayesian estimation methods?



whitcassie

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Answer to Question 1

B

Answer to Question 2

Product recommendation systems.



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