Exam 2: Psychologys Scientific Method

Dr.Stanley predicts that interviewers who smile at their interviewees are more effective at eliciting honest responses than interviewers who do not.To study this,he asks Stacy to smile at the experimental group of interviewees and not smile at the control group of interviewees.In this study,Stacy is the

Liam,a psychology teacher,designs a questionnaire to determine the most preferred social media among students in his classroom.Which measure of central tendency should he use to get an accurate idea?

When psychologists conduct a study,the group of participants chosen for the study is referred to as the

In the context of psychological research methods,which of the following scenarios is an example of the survey method?

Jessica investigates the relationship between caffeine intake and performance on a class test for high school students.Before her sample of students takes an exam,she notes the number of cups of coffee they consumed two hours before the test.She obtains their scores after the test is over.She then calculates the correlation coefficient between the two variables and finds it to be +0.82.Which of the following conclusions should Jessica draw from this value?

In an experimental study,a properly designed hypothesis will test a theory by predicting the

Jacob studies the link between listening to music and happiness.He finds that people who listen to music report that they are happier than people who do not listen to music.Which of the following is most likely to be the correlation coefficient between happiness and listening to music?

In a drug study,a _____ is a harmless substance with no physiological effect that is given to participants in a control group so that they are treated identically to the experimental group except for the active agent.

Inmates at a correctional facility take part in an experiment on social development.Once the experiment is over,the correctional officer goes home and tells his roommates about the results of the study and about the inmates who did not perform well.In this scenario,which ethical guideline of psychological research has been violated by the correctional officer?

Bill can predict participants' scores on a particular math test with perfect accuracy by knowing their scores on a specific aptitude test.Higher scores on the math test are closely associated with higher scores on the aptitude test.Which of the following correlation coefficients most likely expresses an accurate relationship between the two tests?

In the context of correlational research,if there is no relationship between two variables,what is the correlation coefficient?

In experimental research,_____ are factors that systematically and undesirably influence the dependent variable.

A researcher predicted that talking to plants enhances their growth.She gave 24 plants the same amount of water and sunlight.She talked to 12 of the 24 plants daily for 6 weeks and then measured their growth.In this experiment,which of the following is the dependent variable?

Which of the following correlation coefficients is indicative of the strongest relationship between two variables?

Which of the following statements is true of surveys?

David Harper,the marketing manager of a large cosmetic company,observes that when the company decreases the price of its premium deodorant brand,there is an increase in the level of sales of the brand.If the company increases the price of its premium brand,there is a decrease in the level of sales of the brand.In the context of experimental research studies,the changes in price represent the

One way to improve effectiveness of random assignment is to

Contestants of reality television (TV)shows are often asked to engage in unpleasant behaviors,such as eating bugs or living in isolation for days.While viewers think they are learning about human nature,these experiments are not real psychological studies that employ the scientific method and ethical guidelines as put forth by the American Psychological Association.Describe why these TV shows do not meet the ethical guidelines that psychological research must follow.

Jennifer has had a troubled past and has been emotionally affected by her parents' divorce.Jennifer's therapist suggests that she write a book about her life;he says that this will be therapeutic for Jennifer and might help her get closure on her past.Which of the following guidelines should Jennifer follow while attempting to write this book?

In the context of psychology's scientific method,a variable is anything that