Exam 8: Experiments

Sammy did an experiment on children in a classroom.He measured their social anxiety on Monday,randomly assigned half of them to be taught yoga on Wednesday,and measured their social anxiety again on Friday.Measuring the children's social anxiety on Monday is the

To ensure that all your participants have an equal opportunity to be in either experimental group (one receives a drug,the other group receives a placebo),you decide to toss a coin to determine who gets placed in which group.You have engaged in _______.

The greatest advantage of a controlled experiment lies in its ability to explain causality.

Among the requirements for the classical experimental design is a posttest measurement of the

Which of the following does NOT exemplify a natural experiment?

When we are concerned that because of media coverage of violence in schools that research participants' ideas and attitudes about the topic of gun control have changed between the time we first measured them and the second time we measured them after the treatment was administered,we are dealing with the threat to internal validity known as

Matching is always necessary in order to perform strong experimental designs.

The tendency of subjects with extreme values to move towards the mean is statistical regression.

The experimental and control groups should be comparable on

Ryan wanted to study the effect of adult play with preschoolers on the children's noisiness.So,he went to one preschool for a week and played with the children during breaks.At the end of the week,he measured their noisiness.For comparison purposes,he found another preschool across town and measured their noisiness as well to see the effect of playing with the children.The group of preschool children who got to play with Ryan was the

You were asked to participate in an experiment to test the effectiveness of review sessions on exam grades.As a research methods student,you concluded that you had been assigned to the control group because you simply took the scheduled exams.Since you did not want the students in the experimental group to get higher grades than you did on the exams,you organized a review session with other control group subjects.This illustrates

The problem of an interaction between the testing and the experimental stimulus is handled by

The classical experiment includes all of the following EXCEPT

The Hawthorne effect most clearly demonstrates the need for

Without randomly assigning subjects,a researcher administers the experimental stimulus to the experimental group and then measures the dependent variable in both the experimental and comparison groups.This design is known as the

Researchers are increasingly using the World Wide Web to conduct experiments

Explain the elements of the classical experimental design.Is this design especially useful in dealing with causal relationships? If yes,why? If not,why not?

Which of the following is NOT a strategy experimental researchers use to designate who goes into experimental and who goes into control groups

Chip used the local yellow pages to compile a random sample of 100 small businesses to take part in his experiment about hiring decisions.He then used a quota matrix containing the variables she felt would most likely influence the decision to hire,and assigned businesses within each matrix cell alternately to the experimental and control groups.What method of assigning subjects to the experimental and control groups was used?

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