Exam 8: Two-Group Design: Texting: I Cant Get You Out of My Mind

To experimentally test the adage "An apple a day keeps the doctor away," Anika randomly assigned 50 participants to eat an apple every day for one month and assigned 50 participants not to eat any apples during the month-long study period. At the end of the study, she asked all 100 participants how many apples they ate in a given day. This question served as her:

In an experiment, a null hypothesis states that:

Jasmine is a health psychologist who is interested in experimentally investigating whether massages increase psychological well-being. In her study, participants are assigned two one of two groups for a period of one-month. The independent variable in Jasmine's study is operationally defined as:

(Scenario II) Based on the information provided in the scenario, how did Kouchaki and colleagues operationally define guilt?

(Scenario III) The null hypothesis of the study described in Scenario III is:

Suppose an experimenter were examining the relationship between texting and driving and found that there was no difference between the experimental and control groups in typical cell phone use, previous texting experience, or driving history. This would serve to:

Dr. Burgess is studying _____, and the most appropriate means of answering this research question would be to use a nonexperimental research design.

Distinguish which of the following is NOT a benefit that experimental designs offer over nonexperimental designs?

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

(Scenario III) Suppose the researchers who conducted the study described in Scenario III surveyed participants about their caffeine use. Based on their answers, each participant was then assigned to the caffeine condition or control condition. This method of assignment is best described as:

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?

In a study examining the impact of dietary supplements on weight loss, an experimenter would manipulate _____ and measure _____.

When asked to conduct an experiment for his Research Methods class, Santiago had 10 of his friends self-report on the frequency of their exposure to movie violence, as well as their typical level of aggression. Based on his results he concluded that watching violent movies causes people to be more aggressive. Santiago's teacher tells him that he has failed to conduct an experimental study. Why wouldn't this study be considered an experiment?

If Emmanuel is concerned about social desirability bias having an impact on his results, he should choose to use which of the following?

Virtual reality has been used to increase _____ and helps to make a study feel as real as possible.

Statistical significance is to magnitude as:

Joaquin conducts an independent samples t-test that reveals a significant effect of the independent variable on the dependent variable (p = .05). This means that the likelihood that the observed difference between groups is due to chance is:

Sacha is interested in conducting an experiment examining the impact of sleep deprivation on memory. After analyzing her results, she finds a p-value of 0.08. Based on these findings, which of the following is true?

(Scenario II) By randomly assigning participants to the heavy backpack condition or light backpack condition, the experimenters have:

Independent samples t-tests compare _____ groups.