A researcher wanted to see how watching movies influenced subjects’ IQ scores. She gave IQ tests to subjects following each of two movies. Half of the subjects first saw Titanic followed by Schindler’s List, while the other half first saw Schindler’s List and then Titanic. Varying the movie order is an example of:

A researcher was interested in the effects of 1) alcohol consumption and 2) content of a videotape, on how likely one is to support public health myths. The researcher randomly assigned 60 college-aged males to one of the following three groups: no alcohol consumed, a moderated amount of alcohol consumed, and a large amount of alcohol consumed. Additionally, half of the participants were shown the educational video on public health myths. The other half of the participants watched a documentary on owls (a control condition). At the end of the study all the participants filled out a survey on public health myth acceptance. Higher scores on the survey indicated higher acceptance of public health myths.

The results indicated that the participants who watched the educational video scored significantly lower on the public health myth scale compared to the group that watched the owl video. What does this suggest?

You would look at the ______ of a Pearson correlation coefficient (r) to assess the ______ of the relationship between two variables.

What does a two-way ANOVA offer beyond what two separate one-way ANOVAs can tell about the data?

The main effects would be equivalent to what type of information?

What types of research designs are typically preferred to reduce variability by reducing individual differences?

The issue of order effects in a within-groups ANOVA can be resolved by using:

When we restrict the range of X or Y, we may:

The major disadvantage with repeated-measures designs is that they:

If there is zero correlation between two variables, the linear regression equation based on this correlation is a _______ line.