An experimenter was interested in the effect of expectations and drugs on time p
ID: 3228466 • Letter: A
Question
An experimenter was interested in the effect of expectations and drugs on time perception. She gave participants either an amphetamine (a stimulant) or a placebo (an inert substance) and told them that they had received a stimulant or told them that they had received a depressant. The cell means are Sum x and not means. Minimal calculation may be required. The design looks like this:
Actually Received Told They Received
STIMULANT DEPRESSANT
Stimulant [LaTeX: Sigma] X = 205 [LaTeX: Sigma] [LaTeX: chi] = 89
Placebo [LaTeX: Sigmachi] = 195 [LaTeX: Sigmachi] = 37
N FOR EACH CELL IS 8
The score each participant received was a composite of several time-perception measures. Higher scores mean that time perceived as passing more quickly than it is. Below is a summary table.
How many factors are there in this study?
What is another word for factor?
What are the independent variables?
What is the dependent variable?
Please write your results and interpretations (3 points).
Source SS df MS F p
Information 2346.12 1 2346.12 37.21 < .01
Drugs 120.12 1 120.12 1.91 > .05
AB 55.14 1 55.14 0.87 > .05
Error 1765.48 28 63.05
Total 4286.86 31
Explanation / Answer
a)
No of factors in this study are 1+1 = 2
b)
Another name for factor is independent variable.
c)
mean is the dependent variable,
d)
Information variable is significant as p - value is less than 0.05.
Drugs variable is not sigificant as p - value is greater than 0.05.
Interaction effect is also not significant.
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