10. In 1974, Loftus and Palmer conducted a classic study demonstrating how the language used to ask a ques- tion can influence eyewitness memory. In the study. college students watched a film of an automobile accident and then were asked questions about what they saw. One group was asked, “About how fast were the cars going when they smashed into each other?" Another group was asked the same question except the verb was changed to "hit" instead of "smashed into." The "smashed into" group reported signifi- cantly higher estimates of speed than the "hit" group. Suppose a researcher repeats this study with a sample of today's college students and obtains the following results. 66 66 66 Estimated Speed Smashed into ast Hit n = 15 n = 15 ri- M = 40.8 M = 34.0 SS = 510 SS = 414 a. Do the results indicate a significantly higher esti- mated speed for the "smashed into" group? Use a one-tailed test with a =.01. 5? Use b. Compute the estimated value for Cohen's d to measure the size of the effect. c. Write a sentence demonstrating how the results of the hypothesis test and the measure of effect size would appear in a research report.

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Question 10

10. In 1974, Loftus and Palmer conducted a classic study
demonstrating how the language used to ask a ques-
tion can influence eyewitness memory. In the study.
college students watched a film of an automobile
accident and then were asked questions about what
they saw. One group was asked, “About how fast were
the cars going when they smashed into each other?"
Another group was asked the same question except
the verb was changed to "hit" instead of "smashed
into." The "smashed into" group reported signifi-
cantly higher estimates of speed than the "hit" group.
Suppose a researcher repeats this study with a sample
of today's college students and obtains the following
results.
66
66
66
Estimated Speed
Smashed into
ast
Hit
n = 15
n = 15
ri-
M = 40.8
M = 34.0
SS = 510
SS = 414
a. Do the results indicate a significantly higher esti-
mated speed for the "smashed into" group? Use a
one-tailed test with a =.01.
5? Use
b. Compute the estimated value for Cohen's d to
measure the size of the effect.
Transcribed Image Text:10. In 1974, Loftus and Palmer conducted a classic study demonstrating how the language used to ask a ques- tion can influence eyewitness memory. In the study. college students watched a film of an automobile accident and then were asked questions about what they saw. One group was asked, “About how fast were the cars going when they smashed into each other?" Another group was asked the same question except the verb was changed to "hit" instead of "smashed into." The "smashed into" group reported signifi- cantly higher estimates of speed than the "hit" group. Suppose a researcher repeats this study with a sample of today's college students and obtains the following results. 66 66 66 Estimated Speed Smashed into ast Hit n = 15 n = 15 ri- M = 40.8 M = 34.0 SS = 510 SS = 414 a. Do the results indicate a significantly higher esti- mated speed for the "smashed into" group? Use a one-tailed test with a =.01. 5? Use b. Compute the estimated value for Cohen's d to measure the size of the effect.
c. Write a sentence demonstrating how the results of
the hypothesis test and the measure of effect size
would appear in a research report.
Transcribed Image Text:c. Write a sentence demonstrating how the results of the hypothesis test and the measure of effect size would appear in a research report.
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