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In descriptive/correlational research, the investigator


A) systematically observes two variables to see whether there is an association between them.
B) manipulates a variable under carefully controlled conditions and observes whether there are changes in a second variable as a result.
C) exposes subjects to two closely related treatment conditions.
D) simultaneously manipulates two or more independent variables.

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

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While a(n) ____ is the group of individuals actually observed in a research study, the ____ is the group of individuals that researchers want to generalise or extend their findings to describe.


A) experimental group; control group
B) control group; experimental group
C) population; sample
D) sample; population

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

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Naturalistic observation, case studies, and surveys all have in common that


A) they do not directly observe behaviour.
B) they do not manipulate the variables under study.
C) they can show causal relationships.
D) the results obtained cannot be analysed statistically.

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

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Bill received a poor performance evaluation in his job last year.Since then Bill has started working through his lunch hour, has taken on four special projects, and has enrolled in night classes to upgrade his computer skills.If Bill receives a better evaluation at his next performance it will be hard for him to figure out why because


A) he failed to use a double-blind procedure to test his hypothesis.
B) he didn't formulate a research hypothesis before implementing the changes.
C) none of the actions he took are likely to be related to his overall job performance.
D) the three actions he took are confounded with each other.

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

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Variables, other than the independent variable, that are likely to influence the dependent variable are called ____________________ variables.

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Describe how inferential statistics are used and explain statistical significance.

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Inferential statistics are used to inter...

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Statistics that are used to interpret data and draw conclusions are called


A) descriptive statistics.
B) inferential statistics.
C) numerical statistics.
D) significant statistics.

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

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Gugu is in a class where the scores on the second midterm exam ranged from 75 to 85 points.Shaun is taking the same course, but in his section the scores ranged from 50 to 98 points.In this example the standard deviation in Gugu's class should be


A) negatively correlated with the standard deviation in Shaun's class.
B) lower than the standard deviation in Shaun's class.
C) higher than the standard deviation in Shaun's class.
D) the same as the standard deviation in Shaun's class.

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

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Dr Mokoena believes that people who are under stress will develop more colds than people who are not under stress.When he randomly selects 10 participants and exposes them to high levels of stress, he finds that 9 of the participants develop colds.Based on these results he concludes that stress causes an increase in colds.Dr Mokoena's reasoning may be flawed because in this study


A) there was no dependent variable in his study.
B) there was no control group for comparison.
C) he didn't formulate a hypothesis before he collected his data.
D) he didn't measure the independent variable when the study ended.

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

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In Emma's sociology discussion group 4 of the 5 students are between the ages of 19 and 23; the fifth student is 54 years old.If Emma wants to report the statistic that best represents the "average" age for her discussion group, she should report either


A) the mean or the median, because these numbers are typically the same.
B) the mean or the mode, because these number are not affected by extreme scores.
C) the median or the mode, because these numbers will be more representative.
D) the mean or the standard deviation, so additional statistics can be calculated.

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

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The best way to reduce the risk of experimenter bias is to use a double-blind research procedure.

A) True
B) False

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Which of the following statements concerning experimenter bias is false?


A) experimenter bias may influence the behaviour of the participants
B) experimenter bias is often intentional
C) experimenter bias may influence the researcher's observations or recording of participants responses
D) experimenter bias may influence the research project in subtle ways

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

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The second step in the research method is the making of the empirical observations and measurements.

A) True
B) False

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If A and B are highly correlated, which statement MOST accurately describes the relationship between A and B?


A) the score on A causes the score on B
B) the score on B causes the score on A
C) both A and B are caused by a third variable
D) the score on A can be used to predict the score on B

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

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As scientists, psychologists assume that behaviour is governed by some ____________________ order.

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Percy is working with a company to help them develop more effective training programs for their employees.He has spent a great deal of time reviewing all the documentation the company has about previous training opportunities they have provided for their employees.Up to this point in time, Percy has been engaged in


A) psychological testing.
B) archival research.
C) direct observation.
D) meta-analysis.

E) C) and D)
F) A) and D)

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A correlation coefficient of zero describes


A) a positive relationship between two variables.
B) a negative relationship between two variables.
C) the lack of a relationship between two variables.
D) a perfect relationship between two variables.

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

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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 reporting biases.
D) involves only negative instances, and cannot be used to make an unbiased decision.

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

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Which of the following is NOT a common methodological flaw to consider when evaluating scientific research?


A) distortions of self-report
B) sampling bias
C) subject effect
D) placebo effect

E) B) and D)
F) A) and D)

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Dr Desai predicts that if teachers ignore students who act up in class, fewer students will act up in class.Dr Desai's prediction is an example of


A) an operational definition.
B) a theory.
C) inferential statistics.
D) a hypothesis.

E) A) and C)
F) C) and D)

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