Exam 2: Research in Psychology

Laura conducts a study to determine whether her new "puppet" therapy works better than the traditional "talking" therapy.After randomly assigning her own patients to either the "puppet" or "talking" group,Laura herself administers the therapy.This study's most obvious flaw is ____.

Dr.Jiminez investigates the influence of snacking on the onset of sleep in preschool children.One group of preschoolers eats a candy bar prior to bedtime,and the other group eats nothing.Time until the onset of sleep is recorded for each child.In this experiment,eating or not eating the snack is the ____ variable,and the time until the onset of sleep is the ____ variable.

An experimenter is studying the facial expression of the emotion terror.He plans to point a loaded gun at participants as they enter the room and photograph them at the same instant.Such an experiment would be ethically ____.

A researcher shows a violent film to one group of participants and a nonviolent film to another before giving both groups a test measuring aggressiveness.Which statement is true about this experiment?

Nina wants to know whether there is a market for a brand new product,the Arctic Blast,which freezes all types of food within seconds.To find out what percentage of people and what types of people might be interested in such a product,Nina needs to use ____ as her method of research.

A researcher has one group of children go trick-or-treating wearing masks and a second group of children go trick-or-treating without masks.The researcher finds that the children who wore masks took more candy than the children who did not wearmasks.What was the control group in this study?

Dr.Bishop is studying the effects of a drug on memory.Half of his participants will receive the drug,while the other half will receive a placebo.The pills the two groups of participants will take look exactly the same.Dr.Bishop hopes that the use of a placebo will ____.

Which method will result in having a truly random sample of the population of the United States?