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Exam 10: The Nonexperimental and Quasi-Experimental Strategies: Nonequivalent Group,Pre–Post,and Developmental Designs.

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Question 1

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Quasi-experimental studies attempt to minimize threats to validity but nonexperimental studies make little or no attempt.

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Question 2

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Pre-post designs are threatened by ____.

A) ​factors related to the passage of time
B) ​factors related to differences between groups
C) assignment bias
D) ​differential attrition

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Question 3

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Which research design is being used by a researcher comparing self-esteem scores for children from divorced families versus scores for children from families with no divorce?

A time-series design is a(n) ____.

The concept of nonequivalent groups means ____.

Which of these designs comes closest to being a true experiment?

A researcher is examining cooperation between peers by observing children at six years,eight years,and ten years old.If the researcher uses a cross-sectional design and obtains 20 scores for each age,how many children participated in the entire study?​

A researcher introduces a new mathematics program in one school district and uses a neighboring district as a no-treatment control group.Before the program begins,the students in both districts are given a standardized mathematics test.After the program is in place for six months,the students are tested again and the researcher compares the before and after scores for the two groups.This research study is classified as ____.

Although nonexperiments resemble true experiments,they contain ____ and cannot ____.

History effects occur in nonequivalent group designs because the groups probably have different participant characteristics.

A researcher comparing depression scores before and after treatment in one group of clients,is using a(n) ____.

A researcher records participants' weights every Friday for three weeks prior to administering a diet education program and for three weeks following the program.This study is an example of a(n) ____.

What is the appropriate statistical analysis for comparing non-numerical data for a differential design comparing samples representing two populations?

A research study that compared married men,divorced men,and single adult men is an example of the differential research design.

In nonexperimental and quasi-experimental studies,different groups or conditions are defined in terms of ____.

A pretest-posttest study is an example of a nonequivalent groups design.

A problem with nonequivalent group designs is that any differences found could be explained by differences in ____.

A researcher compares preexisting groups of individuals in which type of study?

Last year,the state increased the speed limit on one section of highway from 55 to 65 mph.To evaluate the effect of the change,a researcher gathered accident reports for six months before the change and for six months after the change.This is an example of a(n) ____.

In a pretest-posttest design,a researcher makes multiple observations before and after the introduction of a treatment.