The control group in an experiment is the:

Group not getting the treatment

A researcher looks at her data and finds the results are NOT statistically significant, meaning

The results are probably due to chance variation

The main strength of the experimental method is:

It shows a cause and effect relationship

Why is a placebo given in an experiment?

So people don't know if they have the "treatment" or not

One weakness of a survey is that:

Self reporting could lead to untrue responses

If brain size and IQ are negatively correlated, which is true?

People with small brains have high IQs

Which would best be studied using naturalistic observation?

Prisoner behavior in the cafeteria

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Psych-Research Methods Review

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A review of Psychology Research Methods

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Questions 20

Answers

1
The control group in an experiment is the:
Group getting the treatment
One receiving the dependent variable
Group not getting the treatment
One not being told what to do
2
A researcher looks at her data and finds the results are NOT statistically significant, meaning
The study found causation, not a correlation
The results are probably due to chance variation
The data shows to correlation between the two variables
The data was biased in some way
3
Researchers find that the more hours students sleep, the higher their quiz scores. This is:
A negative correlation
No correlation
A cause & effect relationship
A positive correlation
4
Which is NOT an ethical standard in research studies?
Confidentiality of personal info
Informed consent
Debriefing participants
Double-blind studies
5
The main strength of the experimental method is:
It studies participants in great depth
It shows a cause and effect relationship
It is easy to set up an experiment
It shows correlations
6
A researcher explains to participants after a study what the study was actually about. This is
Informed consent
Debriefing
Limiting physical/emotional harm
Confidentiality
7
An experiment is different from other types of studies because it can find:
Statistical significance
Cause and effect relationships
Correlations
Important information
8
A study is done that tests whether exercise improves concentration. Independent variable?
Concentration
Exercise
The group not exercising
The group exercising
9
Picking every other person from a sample and putting them in the control group is an example of
Representative sampling
Population sampling
A double-blind procedure
Random assignment
10
What is the mean for the following scores? 1, 3, 4, 7, 9, 10, 15
49
9
14
7
11
Why is a placebo given in an experiment?
Because it is only fair to get each group something
So people don't know if they have the "treatment" or not
To make sure results are accurate
Because they are in the experimental group
12
One weakness of a survey is that:
You cannot get a wide variety of info
They are difficult to administer
Self reporting could lead to untrue responses
Its hard to get responses from lots of people
13
A researcher thinks that taking an SAT prep course increases vocab. The dependent variable is:
Taking SAT prep course
Vocabulary
Doing well in prep course
Studying for SATs
14
Which data measure is most influenced by outliers?
Mode
Standard deviation
Median
Mean
15
If brain size and IQ are negatively correlated, which is true?
IQ is unpredictable based on brain size
People with small brains have high IQs
People with large brains have high IQs
People with small brains have low IQs
16
This scatterplot shows a:
No correlation
Negative correlation
Inaccurate correlation
Positive correlation
17
Which would best be studied using naturalistic observation?
Political beliefs of college kids
A person who was hit by a train and lived
Prisoner behavior in the cafeteria
Whether breast milk is best for babies
18
What percent of scores fall within 1 standard deviation of the mean?
68%
95%
13.5%
34%
19
What is the median in this set of data? 1, 5, 9, 14, 15
14
16
9
8.8
20
A researcher studies a boy who was found living alone until age 6. Research method?
Experiment
Naturalistic observation
Survey
Case study

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