The relationship between two variables (X and Y) may differ depending on the level of some third variable (Z). In such situations, Z is said to be a moderator of the relation between X and Y. Imagine a situation in which a researcher has collected data from a group of individuals and computed the correlation between time spent playing video games (X) and grades in school (Y) and observed a value of zero. On the basis of this result, the researcher may be tempted to conclude that there is no relationship between these two variables. As part of the study, however, the researcher has also asked individuals to report how much time they spent studying (Z). When looking at just the cases for which students ...

  • Loading...
locked icon

Sign in to access this content

Get a 30 day FREE TRIAL

  • Watch videos from a variety of sources bringing classroom topics to life
  • Read modern, diverse business cases
  • Explore hundreds of books and reference titles