How do main effects and interactions differ?

What will be an ideal response?


Main effects give an indication as to whether groups differ from one another in a general sense. That is, does an IV have an effect on the DV regardless of the level of any other IVs? A main effect looks at a single variable, ignoring all other variables.
An interaction gives an indication as to whether the pattern of results is complex, so that we can't understand the effect of one IV unless we know something about how it is paired with another IV. Interactions give us pictures of the why we might need to consider two variables in combination rather than separately.

Political Science

You might also like to view...

A trend in the representation of poor people accused of a felony or misdemeanor case that may result in incarceration is

A) ?more poor people are representing themselves. B) ?more private attorneys are representing the poor. C) ?more counties are establishing public defender's offices to represent the poor. D) ?the Texas Indigent Defense Commission has taken over the responsibility for providing attorneys for poor people.

Political Science

One major criticism of the welfare reform programs enacted during Clinton administration in the late 1990s is that the program ______.

A. has led to more welfare fraud B. has not lifted people out of poverty due to low wages C. requires people to work, a politically unpopular requirement D. immediately led to dramatically increased welfare caseloads in states

Political Science

Evaluate same-sex marriage from a conservative perspective and from a liberal perspective. Would conservative and social conservative viewpoints be the same? Why or why not?

What will be an ideal response?

Political Science

Which of these questions could be addressed by a case study on voter behavior?

a. Why is voter turnout lower during mid-term elections than presidential elections? b. Why are U.S. citizens less likely to vote in presidential elections than French citizens? c. Why is party affiliation stronger in the United States than in some countries with higher voter turnout rates? d. Why are voter turnout rates higher in countries with parliamentary systems than they are in countries with presidential systems?

Political Science