Exam 14: Two-Way Between-Groups Anova

In a _____, the effect of one independent variable reverses based on the _____.

An effect size of 0.062 for a two-way ANOVA is considered to be:

The Educational Testing Services (ETS) is conducting a study to determine the relation between method of presentation (standard lecture vs.computer presentation) and type of lecture (psychology, English, or statistics) to lecture comprehension.How many cells are in this design?

A(n) _____ occurs when _____ independent variable(s) have an effect on the dependent variable in combination with one another.

In determining main effects and interactions in a factorial ANOVA, it is helpful to use the _____ in a table of means.

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

A researcher wants to statistically test whether gender and political affiliation affect IQ scores.Which test should the researcher use?

A researcher performs a 2 × 4 ANOVA with six participants in each cell of the study design.What is the degrees of freedom for the interaction?

A researcher sets up a study to examine how lecture comprehension of college students is affected by lecture type (history, psychology, statistics, or English), classroom size (large or small), presentation method (blackboard, overhead projector, or computer), and instructor (graduate student, assistant professor, or full professor).How many cells are in this design?

Including a covariate in an analysis means the effects of the independent variables are looked at after statistically adding the effect of another variable.

A researcher for Major League Baseball is interested in visual accuracy of the players.The indicators of visual accuracy are batting average (high vs.low) and a computer "flicker" program that indicates changes in either the central or the noncentral region of a scene.The dependent variable is the time it takes to notice a change during flickers.When the researcher looks at a table of means, the data show that central flicker and high batting average = 40; noncentral flicker and high batting average = 20; central flicker and low batting average = 20; and noncentral flicker and low batting average = 40.Assuming a very powerful statistical test, the researcher should find:

What form of ANOVA should be used to analyze data when there is more than one dependent variable?

An interaction is more likely to occur in a two-way ANOVA when at least one of the main effects is significant.

When performing a two-way ANOVA, there will be three critical values, one for each main effect and one for the interaction.

For the data in the incomplete source table, what is the value of F for the second source, light condition? Source SS df MS F Paint Color 3.5 3 1.167 Light Condition 1.1 2 Paint \times Light 2.2 6 Within 17.0 48 0.354 Total 23.8 59

Overall, children did not remember more words than adults on a memory test, F (1, 153) = 3.00, p > 0.10, and participants listening to music during the test did not remember more words than those not listening to music, F (1, 153) = 1.98, p > 0.10.However, listening to music significantly aided the children in remembering the words, while it hindered the adults in remembering the words, F (1, 153) = 12.73, p < 0.05.Which effect(s) must be present in this study for these results to be valid?

Which statement BEST describes an interaction in a two-way ANOVA?

The variations on ANOVA, MANOVA and MANCOVA, both include a covariate in the design.

Forys and Dahlquist (2007) investigated the effects of coping style and cognitive strategy on dealing with pain.Participants were first classified as having a monitoring or avoiding coping style.Participants were then randomly assigned to one of two cognitive strategy conditions, distraction or sensation monitoring.Participants were next instructed to use the cognitive strategy while submerging their hand in ice water.The researchers measured pain tolerance as the number of seconds participants were able to keep their hand in the ice water.What is(are) the main effect(s) being tested in the study?

A researcher performs a 2 × 4 ANOVA with six participants in each cell of the study design.What is the within-groups degrees of freedom?