Which statement accurately describes effect size?

Which statement accurately describes effect size?
 
  a) An effect size refers to the statistical significance of an effect.
  b) An effect size refers to the magnitude of a difference between groups.
  c) An effect size refers to the influence of the experimenter.
  d) An effect size refers to the physical size of a manipulation.

Question 2

A Type I error refers to
 
  a) The probability of accepting the null hypothesis when it is true
  b) The probability of rejecting the null hypothesis when it is false
  c) The probability of accepting the null hypothesis when it is false
  d) The probability of rejecting the null hypothesis when it is true

Question 3

Probability levels are represented by
 
  a) Alpha
  b) Gamma
  c) Beta
  d) Delta

Question 4

If a difference between groups is found to be statistically significant, the difference is thought to be
 
  a) Important
  b) Huge
  c) Reliable
  d) Generalizable

Question 5

The null hypothesis specifies
 
  a) There are differences that exist between participants.
  b) There are no differences between groups.
  c) The difference between conditions is not significant.
  d) The observed results are not the true results.

Question 6

What is a potentially serious threat to construct validity?
 
  a) Participant is unaware of what is being measured.
  b) Untrue rumors about a study
  c) Participants all receive the same instructions.
  d) Several measures of the same variable