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In scientific investigations, researchers must clearly define the variables under study by precisely describing how they will be measured or controlled. These definitions are referred to as _____ definitions.


A) objective
B) precise
C) operational
D) dictionary

E) All of the above
F) C) and D)

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Darla has sent out a survey in which she is asking people to provide information about their attitudes on a number of sensitive subjects. When the surveys are returned, Darla needs to be aware that the responses may be distorted due to ​


A) placebo effects.
B) self-report biases. ​
C) statistical artifacts. ​
D) meta-analytic controls. ​

E) A) and B)
F) None of the above

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Which of the following statements regarding the use of deception in psychological research is FALSE?


A) Defenders of deception believe that some research questions can only be studied by using deception.
B) Critics of deception believe that the conclusions from studies involving deception are not valid .
C) Critics of deception believe that the deception may result in subjects becoming less trusting of others.
D) Participants in research involving the use of deception generally report that they enjoyed the experience.

E) None of the above
F) B) and C)

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Jolyn believed that there are gender differences in driving habits. To test this assumption, she stood near a quiet intersection. Jolyn then recorded the gender of each driver who approached a stop sign and whether the individual came to a complete stop before proceeding into the intersection. Jolyn is conducting ​


A) an experiment with two dependent variables.
B) case study research. ​
C) naturalistic observation. ​
D) psychological testing. ​

E) None of the above
F) B) and D)

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Conclusions concerning cause-and-effect relationships are only possible when the _____ method is used.


A) survey
B) experimental
C) correlational
D) descriptive

E) C) and D)
F) B) and C)

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A psychologist monitors changes in the subject's heart rate as the subject watches a violent movie. The data collection technique being used is ​


A) direct observation.
B) psychological testing.
C) physiological recording.
D) archival records.

E) B) and C)
F) A) and B)

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Collecting information about people's attitudes is most commonly done using _____.

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A standardized measure used to obtain a sample of a person's behavior is called a(n)


A) psychological test.
B) case study.
C) experiment.
D) survey.

E) B) and C)
F) A) and B)

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Explain the difference between a correlational and an experimental research study and what type of conclusions can be drawn from each.

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Experimental research involves the manip...

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Dr. Dickinson is investigating the link between social support networks and grades in school. Students in his classes are required to complete survey forms related to this research. If a survey form is not completed by the end of the semester, a student's grade is reduced by 10 points. In this case, some researchers might argue that Dr. Dickinson's research violates the ethical principle of ​


A) right to privacy.
B) full disclosure. ​
C) voluntary participation. ​
D) protection from harm. ​

E) C) and D)
F) None of the above

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If a researcher varies the loudness of music in a factory to observe its effect on employee productivity, the dependent variable is


A) the  factory setting.
B) employee productivity.
C) the style of music being used.
D) the loudness of music being used.

E) B) and C)
F) C) and D)

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Sometimes a subject's expectations may lead to behavior change in the absence of any effective treatment. This is referred to as an example of ​


A) sampling bias.
B) experimenter bias. ​
C) socially desirable responding. ​
D) the placebo effect. ​

E) A) and B)
F) A) and C)

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A scientific journal is a


A) personal diary kept by a scientist.
B) periodical that publishes technical and scholarly articles.
C) detailed record of the daily procedures followed in conducting a study.
D) collection of biographies of famous scientists.

E) B) and C)
F) C) and D)

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The purpose of the control group is to ​


A) make the experiment more complex.
B) isolate the effect of the independent variable on the dependent variable. ​
C) make statistical significance more likely. ​
D) isolate the effect of the dependent variable on the independent variable. ​

E) A) and B)
F) B) and C)

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The hypotheses for a research study are MOST likely to be found in the _____ section of a journal article.


A) methodology
B) reference
C) results
D) introduction

E) None of the above
F) All of the above

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A tentative statement about the relationship between two or more variables is a(n) ​


A) variable.
B) hypothesis. ​
C) theory. ​
D) operational definition. ​

E) B) and D)
F) B) and C)

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Individuals who think critically do NOT rely on anecdotal evidence because this type of evidence


A) is too general and can be applied to too many unrelated situations.
B) is based on inferential statistical analysis, which is generally unreliable. ​
C) can be distorted by social desirability bias. ​
D) involves only negative instances, and cannot be used to make an unbiased decision. ​

E) None of the above
F) B) and C)

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Dr. Webb designs a research study in which the subjects and the individuals who interact directly with them do not know who in is the control group and who is in the experimental group. Dr. Webb probably chose this type of research design in order to


A) avoid the need to obtain ethics approval for the study.
B) minimize the possibility of self-report bias.
C) ensure that her sample is not biased.
D) reduce the impact of experimenter bias.

E) B) and C)
F) B) and D)

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A researcher is investigating the effects of caffeine consumption on student writing performance.  Because the researcher will evaluate both the speed of assignment completion and the number of grammatical errors, she will need to include more than one _____ variable in her study.


A) independent
B) dependent
C) confounding
D) extraneous

E) All of the above
F) A) and C)

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Statistical procedures are used during which of the following steps in conducting a scientific investigation?


A) Collect the data
B) Select a research method and design the study
C) Report the findings
D) Analyze the data and draw conclusions

E) All of the above
F) A) and B)

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