Exam 15: Glm 4: Repeated-Measures Designs

When conducting a repeated-measures ANOVA which of the following assumptions is not relevant?

Imagine I ran a one-way repeated-measures ANOVA with five levels on the independent variable.The results revealed a Greenhouse-Geisser estimate,= .977,and the Huynh-Feldt estimate,= .999.What do these values tells us about the assumption of sphericity?

Which of the following is a means to correct for Sphericity?

The results of a one-way repeated-measures ANOVA with four levels on the independent variable revealed a significance value for Mauchly's test of p = 0.048.What does this mean?

What is the consequence of violating the assumption of Sphericity?

Imagine we were interested in the effect of supporters singing on the number of goals scored by soccer teams.We took 10 groups of supporters of 10 different soccer teams and asked them to attend three home games,one at which they were instructed to sing in support of their team compare?

An educational researcher wanted to test the impact of learning environment on children's ability to concentrate on a short reading comprehension task.There were four different environmental settings: 'Noisy','Chill Out','Cold',and 'Screen on' and a group of twenty randomly selected children.He wanted to compare the impact of each setting on each child's individual concertation times and across the group,as well as any interaction effects. What sort of test design best suits this study?

Imagine we were interested in the effect of supporters singing on the number of goals scored by soccer teams.We took 10 groups of supporters of 10 different soccer teams and asked them to attend three home games,one at which they were instructed to sing in support of their team (e.g.,'Come on,you Reds!'),one at which they were instructed to sing negative songs towards the opposition (e.g.,'You're getting sacked in the morning!')and one at which they were instructed to sit quietly.The order of chanting was counterbalanced across groups.An ANOVA with a simple contrasts using the last category as a reference was conducted.Looking at the output tables below,which of the following sentences regarding the contrasts is correct?

When an experimental manipulation is carried out on the same entities,the within-participant variance will be made up of:

Why is it important to look at the effect size?

What is the additional assumption that is applied to Repeated-measures factorial design?

A sports dietician wanted to test the impact of four different dietary supplements ('Placebo','Vitamin X','Vitamin Z' and 'Kale')on a team of thirty randomly selected elite athletes.She wanted to compare the impact of each supplement on each athlete's individual performance scores and across the team,as well as any interaction effects. What sort of test design best suits this study?

Imagine we were trying to interpret the results of a 3  3 two-way repeated-measures ANOVA.The data analysis contains no information about sphericity.In this situation,which of the following rows from the output should be interpreted?

Departures from sphericity can be measured using:

Imagine we were interested in the effect of supporters singing on the number of goals scored by soccer teams.We took 10 groups of supporters of 10 different soccer teams and asked them to attend three home games,one at which they were instructed to sing in support of their team (e.g.,'Come on,you Reds!'),one at which they were instructed to sing negative songs towards the opposition (e.g.,'You're getting sacked in the morning!')and one at which they were instructed to sit quietly.The order of chanting was counterbalanced across groups.Looking at the output below,which of the following sentences is correct?

A researcher in a retail-marketing unit wanted to test the impact of four different advertising campaigns for a new product ('TV','Social Media,'Print Media' and 'Celebrity')on a group of forty randomly selected consumers.She wanted to compare the impact of each advertising campaign on each individual consumer's likelihood of purchasing the product and across the whole group,as well as any interaction effects. What sort of test design best suits this study?

Exercise Two-way repeated-measures ANOVA compares:

Imagine we were interested in the effect of supporters singing on the number of goals scored by soccer teams.We took 10 groups of supporters of 10 different soccer teams and asked them to attend three home games,one at which they were instructed to sing in support of their team (e.g.,'Come on,you Reds!'),one at which they were instructed to sing negative songs towards the opposition (e.g.,'You're getting sacked in the morning!')and one at which they were instructed to sit quietly.The order of chanting was counterbalanced across groups.Which of the following sentences regarding the output from Mauchly's test of sphericity below is correct?

Which of the following statements is false? When you have data that violate the assumption of sphericity:

A nutritionist conducted an experiment on memory for dreams.She wanted to test whether it really was true that eating cheese before going to bed made you have bad dreams.Over three nights,the nutritionist fed people different foods before bed.On one night they had nothing to eat,a second night they had a big plate of cheese,and the third night they had another dairy product,milk,before bed.All people were given all foods at some point over the three nights.The nutritionist measured heart rate during dreams as an index of distress.Which statement is the correct way to report these results?