quiz 2 questions Flashcards
A researcher is studying the relationship between hours of sleep and productivity at work. The researcher found that there is a strong, positive correlation between the variables. Which of the following correlation coefficient values is most likely to represent this correlation between sleep and productivity?
+ .80
Why are operational definitions important in psychological research?
They provide a clear and measurable way to define variables, ensuring consistency and replicability.
A psychologist is studying the effect of sleep duration on memory retention in college students. The participants are divided into three groups: one group sleeps for 4 hours, another for 6 hours, and the last for 8 hours. After sleeping, all participants take a memory test. What are the independent and dependent variables in this study?
Independent variable: Sleep duration; Dependent variable: Memory retention
A news headline claimed that “Social Media Causes Loneliness” based on a positive relationship between time spent on social media and reported feelings of loneliness. Sophia, a psychology student, thought this headline might be misleading because she believed that underlying factors like social anxiety might influence both social media use and loneliness. This is an example of
A third variable
Maya is selected for a study on exercise frequency and stress levels. She believes the experimenter’s hypothesis is that people who exercise regularly experience less stress. Consequently, Maya reports exercising more often than she actually does and gives lower scores on self-reported stress. This is an example of
participant demand
A team of researchers wanted to study the beer consumption habits of college students. To do this, they randomly assigned participants to drink beer from either a glass, a bottle, or a pitcher and then measured the amount consumed in each condition. Their findings showed that participants drank the most beer when it was served in a pitcher, followed by a bottle, and then a glass. What kind of research design did these researchers employ?
Experimental
As part of their class, Jamey conducts an exact replication of a published study. Because Jamey only has a few weeks to conduct the research, they are only able to recruit 12 participants. Jamey’s research does not find the same results as the original study. What is the most likely explanation for why?
Jamey’s sample size was too small.
Dr. Christenson is attempting to conduct an exact replication of a past study. Under these circumstances, what should he do?
Dr. Christenson would read the published article about the original research and use the same materials and procedures with new participants.
Researchers sometimes use ________ in cases where providing participants with the full details of the experiment could skew their responses.
deception
Inez conducted an experiment on the effectiveness of a new antidepressant medication. She decided that participants who had been diagnosed with depression would be in the treatment group and participants who had never been treated for depression would be in the control group. Which important aspect of experimental research design did Inez overlook?
Random assignment
