Exam 8: Two-Group Design: Part 2

Malica recently completed an experiment that revealed participants are less likely to offer assistance to a victim when there are many bystanders than when there are fewer bystanders.Which of the following represents a plausible follow-up experiment to extend her current findings?

Jasmine is a health psychologist who is interested in experimentally investigating whether massages increase psychological well-being.In her study,participants are either assigned to receive one massage a week for a month or no massages during the month-long study.The independent variable in Jasmine's study is operationally defined as:

After data collection,an experimenter must do each of the following,EXCEPT:

After conducting an independent samples t-test on your data,what test statistic should you examine to determine whether there is a statistically significant difference between groups?

Costanza conducts a true experiment examining the effect of energy drinks on work performance.As such,you know that her experiment has _____ internal validity.

Each of the following bolsters confidence in the obtained results of an experiment,EXCEPT:

In designing an experiment,the _____ should be developed before the _____.

Eric wants to verify that automatic toothbrushes work better than manual toothbrushes.To test this,he randomly assigns 25 participants to use a Sonicare toothbrush and 25 people to use a manual toothbrush.At the end of the study period he has a dentist inspect each participants' teeth.In his study,the _____ would be considered the independent variable,whereas the _____ would be considered the dependent variable.

Professor Loman is interested in conducting a study examining the impact of class discussions on students' overall understanding of course concepts.In his experiment he uses a convenience sample of college-aged students.Ultimately,this is not a problem,because:

Independent samples t-tests are appropriate for which of the following?

In an experiment,researchers assign participants to either the experimental or control condition by using:

Elizabeth was interested in investigating whether people who use credit cards spend more money than people who pay in cash.To examine this research question experimentally,she _____ the type of payment participants used and _____ money spent.

In a study examining the impact of wearing eyeglasses on the likelihood of being hired for a job,participants who are assigned to wear eyeglasses to their job interviews are in the _____ condition.

Why might an experimenter choose to use a behavioral measure of the dependent variable rather than a self-report measure?

Which of the following is a disadvantage of experimental study designs as compared to nonexperimental study designs?

Aya is a developmental psychologist who is interested in studying children's acrophobia (i.e. ,fear of heights).In her experimental study,she randomly assigns some infants to crawl to their mothers on the floor.Other infants must crawl across a glass table (allowing them to see how high they were off of the ground)to get to their mothers.In her study,who is in the control condition?

Experimenters use random assignment of participants to different groups in order to:

Which of the following steps in the research process would take place after data analysis?

When results of an experiment reveal a large effect size for the dependent variable,this tells you that:

A t-test for independent means is appropriate for studies who use a: