Exam 8: Experiments

Professor Rose was asked to design an experiment to test whether obese people would lose weight on a Pickup diet plan.Professor Rose was not a methodologist.Rose asked for your help.You immediately told Rose that the selected design would have to be sensitive to the issues of statistical regression,mortality,and demoralization.Rose said,"I don't understand." Explain these issues to Rose.Suggest and explain a design that would control for these problems.

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Question 1

Correct Answer:

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Typical answers will define statistical regression as a concern with the fact that the study is using people who have extreme weights and consequently,they can only lose weight.
Mortality refers to dropping out of the study.People may drop out because they do not like the diet or because the study is conducted over a prolonged period of time and they lose interest.
Demoralization refers to feelings of deprivation within the control group and so they give up;they have not lost any weight.The classical experimental design would control for these issues.

Instrumentation is NOT a threat to internal invalidity in the one-shot case study.

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(True/False)

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Question 2

Correct Answer:

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True

The classical experimental design:

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Question 3

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Which of the following experimental designs have the least explanatory power compared to the others?

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Question 4

An instrumentation effect occurs when:

(Multiple Choice)

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Question 5

The question of internal invalidity refers to:

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Question 6

Which of the following would constitute a "natural" experiment?

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Question 7

In order to ensure that experimental and control groups are similar before the experiment begins,social scientists sometimes:

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Question 8

Kyo is looking to perform a quick research study to determine the effects of a documentary about domestic violence on people's perceptions of violence.His experiment consists of administering a brief survey to a group,having them watch a movie,then surveying them as they leave to determine if any change occurred.What kind of design is Kyo utilizing?

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Question 9

In a natural experiment,the researcher does NOT manipulate the independent variable.

(True/False)

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Question 10

An experiment examines the effect of the:

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Question 11

With a large pool of subjects,randomization is the preferred technique for assigning subjects to experimental and control groups even when you CAN specify in advance the relevant matching variables.

(True/False)

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Question 12

The dependent variable is also known as the experimental stimulus.

(True/False)

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Question 13

The Solomon four-group design:

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Question 14

In Professor John's three week experiment,the control group has realized that the experimental group is being exposed to lavish lunches as part of the experiment,while they are stuck with plain microwaved meals.In protest,they have decided to stop full participation.Which form of internal invalidity does Professor John have to worry about?

(Multiple Choice)

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Question 15

A friend of yours,a senior,took the Graduate Record Exam in September and scored in the 99th percentile.In February,your friend took the same exam over again.This time your friend scored in the 90th percentile.As a research methods student,you told your friend that his/her lowered score was most likely due to:

(Multiple Choice)

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Question 16

Researchers tend to use probability sampling to recruit subjects for the experimental and control groups.

(True/False)

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Question 17

The use of an experimental group allows the researcher to control for the effects of the experiment itself.

(True/False)

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Question 18

A fully representative sample is not as essential in experimental research,because we are measuring effects on the individual,not the individual themselves.

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Question 19

The Solomon four-group design utilizes how many control groups?

(Multiple Choice)

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Question 20

Showing 1 - 20 of 42

Instrumentation is NOT a threat to internal invalidity in the one-shot case study.

The classical experimental design:

Which of the following experimental designs have the least explanatory power compared to the others?

An instrumentation effect occurs when:

The question of internal invalidity refers to:

Which of the following would constitute a "natural" experiment?

In order to ensure that experimental and control groups are similar before the experiment begins,social scientists sometimes:

In a natural experiment,the researcher does NOT manipulate the independent variable.

An experiment examines the effect of the:

With a large pool of subjects,randomization is the preferred technique for assigning subjects to experimental and control groups even when you CAN specify in advance the relevant matching variables.

The dependent variable is also known as the experimental stimulus.

The Solomon four-group design:

Researchers tend to use probability sampling to recruit subjects for the experimental and control groups.

The use of an experimental group allows the researcher to control for the effects of the experiment itself.

A fully representative sample is not as essential in experimental research,because we are measuring effects on the individual,not the individual themselves.

The Solomon four-group design utilizes how many control groups?

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