Which of the following represent a threat to statistical ...

[asan beg]

Which of the following represent a threat to statistical conclusion validity?
 
  a) Unreliable and invalid measures
  b) Lack of variability in responses to a measure
  c) Few manipulations
  d) Experimenter bias

Question 2

Placebo effects (e.g., for clinical depression) tend to
 
  a) Have small effects on psychological problems
  b) Be a little better than no treatment but for many people
  c) Produce powerful and dramatic effects
  d) Be very transient which is why active drugs work better

[kiamars2010]

Answer to Question 1

Correct Answer: a

Answer to Question 2

Correct Answer: c

[asan beg]

Excellent

[momolu]

Wow, this really help