# UNLV PSY 240 – Treatment variable is another name

QUESTION 50Treatment variable is another name forindependent variable.dependent variable.extraneous variable.mediating variable.0.325 points QUESTION 51Laura was conducting a study on two treatment interventions to increase patriotism. During her study, the terrorist attacks on the Pentagon occurred. This is an example of which of the following validity threats?Statistical regressionInstrumentationHistoryTesting0.325 points QUESTION 52Anne’s study compared pre-post differences in pre-kindergarten children’s strategies for alternatives to violent displays when frustrated by others. She found that there were differences between pre- and post-testing. With which validity threat should Anne be most concerned?Differential selectionStatistical regressionMaturityInstrumentation0.325 points QUESTION 53In Katia’s remedial mathematics study, she collected pretest data from a group of participants. She divided the participants into three groups. One group received no treatment, one group received instruction by a teacher-delivered intervention, one group received peer-tutoring on the same problems. After the intervention she tested their math skills. With which validity threat should Katia be most concerned?MaturationTestingInstrumentationMortality0.325 points QUESTION 54Max’s study compared the differences in teachers’ attitudes about inclusion before and after a Saturday in-service training. He assessed their post-intervention attitudes with a self-report questionnaire. With which of the following threats to validity should Max be particularly concerned?InstrumentationMortalitySelectionHistory0.325 points QUESTION 55Russell’s study compared GPA of students who volunteered for academic study skills training and those who did not elect to take the training. He found that those who had the training also had higher GPA. With which validity threat should Russell be most concerned?MaturationInstrumentationHistorySelection0.325 points QUESTION 56Shelly’s study compared the effects of two different types of phonemic instruction on young children who volunteered to participate in the study. She gave each participant who completed the study two pencils and three stickers. These incentives are likely a strategy to decrease the threat ofhistoryinstrumentationdifferential selectionmortality0.325 points QUESTION 57Nadine conducted a pretest-posttest control group design. The comparison group received a traditional lecture of course content while the treatment group received the lecture and instructor-provided summary notes. She found, however, no differences between conditions, due in part to students sharing the instructor summaries across conditions. This is an example ofcompensatory rivalry.treatment diffusion.placebo effect.experimenter bias.0.325 points QUESTION 58In a recent study of young children’s reading skills, Gregg and Steve both collected data. Gregg did not push the children and his scores are systematically lower than are Steve’s. This example illustratescompensatory rivalry.placebo effect.treatment diffusion.experimenter effects.0.325 points QUESTION 59Given a choice of the following research designs, which design controls the most threats to internal validity?One-shot case studyOne group pretest-posttestStatic group comparisonPretest-posttest control group0.325 points QUESTION 60One drawback of the Solomon four-group design islack of control for threats to internal validity.the large number of participants needed.systematic desensitization.increased experimenter effects.0.325 points QUESTION 61A factorial design includesone manipulated independent variable.more than one manipulated independent variable.two or more independent variables, one of which is manipulated.multiple dependent variables.0.325 points QUESTION 62Scenario: Jack wants to test if runners on his cross-country team improve with his new training regimen. He takes their times at the beginning of the season and again at the end of the season.Question: Which of the following designs is Jack best illustrating?One-shot case studyOne-group pretest-posttest designPretest-posttest control group designTime series design0.325 points QUESTION 63Scenario: Jack wants to test if runners on his cross-country team improve with his new training regimen. He takes their times at the beginning of the season and again at the end of the season.Question: Runners in Jack’s study who improved their times due to running generally and not necessarily due to the new regimen is an example of which of the following threats?SelectionMaturationHistoryInstrumentation0.325 points QUESTION 64Jorge studies the effects of mnemonic training on learning vocabulary. He randomly assigns one group to a no-treatment control and he gives mnemonic training to the other group. He assesses them at the end of the study and compares how many words they know. Which of the following designs is Jorge best illustrating?Pretest-Posttest control group designNonequivalent group control group designPosttest-only control group designTime series design0.325 points QUESTION 65Nora is interested in differences in amount of content retained from a lecture based on time of class. She compares her two sessions – one that meets at 8 am and one that meets at 2 pm – by testing them, unannounced, on content that she taught two weeks ago. Which of the following designs is Nora best illustrating?One-shot case studyOne group pretest-posttest designPosttest-only control group designStatic group comparison0.325 points QUESTION 66Kari wants to make sure that all students in her study get both of the treatments she is testing. To assure all subjects get both interventions, which of the following designs should Kari consider?Within-subjects designSolomon Four-Way Group designCounterbalanced designNonequivalent groups control group design0.325 points QUESTION 67A study that addressed the effects of gender and type of practice (massed, distributed, massed and distributed) would be symbolized as2 x 2 factorial design3 x 2 factorial design4 x 2 factorial designSolomon four-group design0.325 points QUESTION 68Ingrid works as a teacher in a small private school that does not have a food service program. She sees what kids bring to school and is very worried that families are not supporting their children’s nutritional needs enough. This year she decides to conduct a study to see if sending home literature and homework that parents must do with their children makes a difference in their application of appropriate selections in children’s lunches at the end of the year. Which of the following designs best represents Ingrid’s research design plan?One-shot case studyStatic group comparisonPretest-posttest control groupSolomon four-group design0.325 points QUESTION 69Francis wants to present the average mathematics score attained by the participants in her study. She needs to report a measure ofdispersion index.variability.central tendency.relative position.0.325 points QUESTION 70A small deviation indicates thatthere are a small number of data points.the median score is relatively small.the variance in scores is small.there are a number of missing data points.0.325 points QUESTION 71A standard score is a measure ofvariability.central tendency.relative position.correlation.0.325 points QUESTION 72The z score is an example ofstandard score.correlation measure.variability.measure of central tendency.0.325 points QUESTION 73Scenario: Given the following scores on a midterm exam – 72, 89, 91, 90, 100, 68, 80, 76, 78, 94, 94, 90, 84, 86, 88, 87, 92, 96, 74, 93 – find the best answer to this question:Calculate the mean of the scores.838690920.325 points QUESTION 74Scenario: Given the following scores on a midterm exam – 72, 89, 91, 90, 100, 68, 80, 76, 78, 94, 94, 90, 84, 86, 88, 87, 92, 96, 74, 93 – find the best answer to this question:Calculate the standard deviation of the scores.4.66.88.79.40.325 points QUESTION 75Scenario: Given the following scores on a midterm exam – 72, 89, 91, 90, 100, 68, 80, 76, 78, 94, 94, 90, 84, 86, 88, 87, 92, 96, 74, 93 – find the best answer to this question:What is the range?242832460.325 points QUESTION 76Scenario: Given the following scores on a midterm exam – 72, 89, 91, 90, 100, 68, 80, 76, 78, 94, 94, 90, 84, 86, 88, 87, 92, 96, 74, 93 – find the best answer to this question:What is the median?888684820.325 points QUESTION 77Scenario: Given the following scores on a midterm exam – 72, 89, 91, 90, 100, 68, 80, 76, 78, 94, 94, 90, 84, 86, 88, 87, 92, 96, 74, 93 – find the best answer to this question:What is the mode?68768490