Exam 11: Factorial Designs

The following data show the means for four treatment conditions as well as the overall means for the columns and the rows.For these data,what numbers are compared to assess the main effect of factor A? A1 A2 M = 25 M = 65

The following data represent the means for each treatment condition in a two-factor experiment.What pattern of results is shown in the data? A1 A2

A graph of a two-factor study indicates an interaction when the lines on the graph

If the means for a two-factor study are displayed in a graph and the lines in the graph are perfectly parallel,then what can you conclude about the main effects and interaction?

In a matrix representing the structure of a factorial design,the differences between the overall column means define

A two-factor study compares two different treatment conditions (factor 1)for males and females (factor 2).In this study,the males have an average score of 20 in the first treatment and an average of 25 in the second.The females average 35 in the first treatment and 45 in the second.For this study,there is no interaction.

The following data represent the means for each treatment condition in a two-factor experiment.What pattern of results is shown in the data? A1 A2

In a 2 x 3 between-subjects factorial experiment,there are _____ groups of participants.

In a two-factor study,it is possible to have one experimental factor and one nonexperimental factor.

A researcher is trying to determine the best time of day for patients to take a cholesterol medication.A sample of men who have high cholesterol is divided into six groups.One group takes the medication every morning,a second group takes the medication at mid-day,and a third group takes the medication each night.There are also three control groups that receive a placebo instead of the real medication,one in the morning,one at mid-day,and one at night.If the results of the study show a 50-point main effect for the medication (men taking the medicine average 50 points lower cholesterol than men taking the placebo)and also show a significant interaction between medication and time of day,then what can the researcher conclude about the effect of the medication?

In a two-factor study,it is possible to have one between-subjects factor and one within-subjects factor.

Describe what it means to say that order effects are "symmetrical" or "asymmetrical?"

A researcher who is examining the effects of temperature and humidity on the eating behavior of rats uses a factorial experiment comparing three different temperatures (70?,80?,and 90?)and two humidity conditions (low and high).How many factors are in the experiment?

The following data represent the means for each treatment condition in a two-factor experiment.What pattern of results is shown in the data? A1 A2

In a factorial experiment,the number of factors is the number of ___________ variables.

Describe how a second factor can be used to reduce the variance in a between-subjects experiment.

If the means from a two-factor study are displayed in a graph,how can you determine whether there is an interaction between factors?

In a factorial design,an interaction between the factors occurs whenever

A two-factor study comparing task performance for males versus females (factor 1)for three different levels of task difficulty (factor 2)would be described as a 2*3 design.

In a two-factor experiment with 2 levels of factor A and 2 levels of factor B,three of the treatment means are essentially identical and one is substantially different from the others.What result(s)would be produced by this pattern of treatment means?