The following data are representative of many studies examining the relationship between arousal and performance. The general result of these studies is that increasing the level of arousal (or motivation) tends to improve the level of performance. (You probably have tried to “psych yourself up” to do well on a task.) For very difficult tasks, however, increasing arousal beyond a certain point tends to lower the level of performance. (Your friends have probably advised you to “calm down and stay focused” when you get overanxious about doing well.) This relationship between arousal and performance is known as the Yerkes-Dodson law.Use a two-factor ANOVA with α = .05 to evaluate the significance of the main effects and the interaction (conduct all 4 steps!).Calculate the values to measure the effect size for any significant results.Describe the pattern of results. How does the level of arousal (motivation) affect performance? Factor B Arousal LevelLowMediumHigh310141018146.67T= 90ROWI69EasyM = 3M = 5M = 10%3DT = 15T = 25T = 50SS = 18SS = 28SS = 26N = 30FactorA TaskDifficultyG = 1202271EX = 860126.TRow, = 30ROW2Difficult321M = 3T = 10T = 15SS = 20SS = 20TcOLI = 20 TCOL2 = 40 TCOL3M :1M =2T = 5SS = 8%3D= 6044

For a two-factor study, there are three separate hypotheses, the two main effects and the…

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

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The following data are representative of many studies examining the relationship between arousal and performance. The general result of these studies is that increasing the level of arousal (or motivation) tends to improve the level of performance. (You probably have tried to “psych yourself up” to do well on a task.) For very difficult tasks, however, increasing arousal beyond a certain point tends to lower the level of performance. (Your friends have probably advised you to “calm down and stay focused” when you get overanxious about doing well.) This relationship between arousal and performance is known as the Yerkes-Dodson law.
1. Use a two-factor ANOVA with α = .05 to evaluate the significance of the main effects and the interaction (conduct all 4 steps!).
2. Calculate the values to measure the effect size for any significant results.
3. Describe the pattern of results. How does the level of arousal (motivation) affect performance?

Factor B Arousal Level
Low
Medium
High
3
10
1
4
10
1
8
14
6.
6
7
T
= 90
ROWI
6
9
Easy
M = 3
M = 5
M = 10
%3D
T = 15
T = 25
T = 50
SS = 18
SS = 28
SS = 26
N = 30
Factor
A Task
Difficulty
G = 120
2
2
7
1
EX = 860
1
2
6.
TRow, = 30
ROW2
Difficult
3
2
1
M = 3
T = 10
T = 15
SS = 20
SS = 20
TcOLI = 20 TCOL2 = 40 TCOL3
M :
1
M =
2
T = 5
SS = 8
%3D
= 60
44

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