Lay out the design for two between-subjects experiments: (a) an experiment invol
ID: 3489484 • Letter: L
Question
Lay out the design for two between-subjects experiments: (a) an experiment involving an experimental group and a control group, and (b) a factorial design with three independent variables that have 3, 2, and 2 levels, respectively.
Lay out the design for two between-subjects experiments: (a) an experiment involving an experimental group and a control group, and (b) a factorial design with three independent variables that have 3, 2, and 2 levels, respectively.
Lay out the design for two between-subjects experiments: (a) an experiment involving an experimental group and a control group, and (b) a factorial design with three independent variables that have 3, 2, and 2 levels, respectively.
Explanation / Answer
An experiment to measure the effect of caffeine on perfomance on a test.
The subjects aged 12- 14 years were divided into two groups.
Experimental group received caffeine based drink before a short presentation on a lesson from their history books was presented.
The control group received a similar looking drink with no caffeine and watched the same presentation.
Immediately after they were givena test based on the presentation and results of two groups were compared
2. An experiment to measure the effect of following factors on test performance.
1. test difficulty - 3 levels easy, hard , very hard
2. amount of caffeine intake before test. - two levels 2 cups, 4 cups
3. number of windows in the test taking room.- two levels no window, 1 window
The students of a school from ages 12-13 were randomly divided into 12 groups each giving the test in seperate rooms simultaneously under different conditions. The 12 test conditions were
1.Easy test, 2 cup caffeine, no window in room
2. Easy test, 2 cup caffeine, 1window in room
3.Easy test, 4 cup caffeine, no window in room
4.Easy test, 4 cup caffeine, 1 window in room
5.Hard test, 2 cup caffeine, no window in room
6. Hard test test, 2 cup caffeine, 1window in room
7.Hard test, 4 cup caffeine, no window in room
8.Hard test, 4 cup caffeine, 1 window in room
9.Very Hard test, 2 cup caffeine, no window in room
10. Very Hard test test, 2 cup caffeine, 1window in room
11.Very Hard test, 4 cup caffeine, no window in room
12.Very Hard test, 4 cup caffeine, 1 window in room
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