PSYC 3003 Week 5 Quiz

PSYC 3003 Week 5 Quiz • Question 1 2 out of 2 points Which of the following provides a visual image of the relationship between two quantitative variables? Selected Answer: a. A scatterplot Correct Answer: a. A scatterplot • Question 2 2 out of 2 points Which of the following statistics would be used to assess the relationship between two nominal variables? Selected Answer: a. The chi-square Correct Answer: a. The chi-square • Question 3 0 out of 2 points In an experimental research design, the research hypothesis is that Selected Answer: a. the participants in the different conditions will show different responses to the dependent variable. Correct Answer: d. the means on the dependent variable will be different in the different levels of the independent variable. • Question 4 2 out of 2 points In an experiment studying the effect of attraction on sexual behavior, the independent variable of attraction is manipulated with two conditions: high attractiveness and low attractiveness. This design has ____________ independent variable(s) with _________level(s). Selected Answer: d. one, two Correct Answer: d. one, two • Question 5 0 out of 2 points Eisenberger, Lieberman, and Williams (2003) studied the extent to which being excluded by others created brain responses similar to those created by physical pain. The participants, who were all studied while they were in an fMRI scanner, first experienced a baseline session, then a session in which they were included in a game, and then a session in which they were excluded in a game. Which of the following designs was used? Selected Answer: b. Between participants Correct Answer: a. Within participants • Question 6 2 out of 2 points Reciprocal causation occurs when Selected Answer: c. the predictor variable causes the outcome variable and vice versa. Correct Answer: c. the predictor variable causes the outcome variable and vice versa. • Question 7 2 out of 2 points In a multiple regression analysis, which of the following are most similar to correlation coefficients? Selected Answer: c. The regression coefficients Correct Answer: c. The regression coefficients • Question 8 2 out of 2 points Daniel is testing the effects of watching cartoons on children’s play. He has one group watch violent cartoons and another one watch non-violent cartoons. He then measures the children’s aggressive play behaviors. What are the levels of Daniel’s independent variable? Selected Answer: b. violent and non-violent cartoons Correct Answer: b. violent and non-violent cartoons • Question 9 2 out of 2 points The level of the independent variable in which the situation of interest was created is frequently known as which of the following? Selected Answer: b. The experimental condition Correct Answer: b. The experimental condition • Question 10 2 out of 2 points If the correlation between variables x and y is r = .50, then the coefficient of determination is Selected Answer: a. .25 Correct Answer: a. .25 • Question 11 2 out of 2 points Which of the following statements is true? Selected Answer: d. Some experiments do not have a control condition. Correct Answer: d. Some experiments do not have a control condition. • Question 12 2 out of 2 points The term experiment refers to which of the following? Selected Answer: d. A research design in which the independent variable is manipulated. Correct Answer: d. A research design in which the independent variable is manipulated. • Question 13 2 out of 2 points Having more than two levels of the independent variable is necessary to Selected Answer: c. detect nonlinear relationships. Correct Answer: c. detect nonlinear relationships. • Question 14 2 out of 2 points A scientist hypothesizes that divorce can lead to depression and that depression can then lead to poor physical health. In this case, depression can be considered Selected Answer: b. a mediating variable. Correct Answer: b. a mediating variable. • Question 15 0 out of 2 points In order to compare the means of levels of task performance when mood state is manipulated experimentally, a researcher would likely use which of the following statistical tests? Selected Answer: b. Chi-square Correct Answer: a. F test • Question 16 2 out of 2 points The goal of random assignment to conditions is to Selected Answer: c. ensure that the participants in the different conditions of the experiment are, on average, equivalent before the experiment begins. Correct Answer: c. ensure that the participants in the different conditions of the experiment are, on average, equivalent before the experiment begins. • Question 17 2 out of 2 points In a correlational research design, Jonas finds that r = .82. Jonas’s data demonstrates which of the following? Selected Answer: c. A positive linear relationship Correct Answer: c. A positive linear relationship • Question 18 2 out of 2 points Which of the following represents the null hypothesis about the means of the dependent variable in a one-way ANOVA with two levels? Selected Answer: a. The mean in level A is equal to the mean in level B. Correct Answer: a. The mean in level A is equal to the mean in level B. • Question 19 2 out of 2 points Which of the following variables affects only the outcome variable but not the predictor variable? Selected Answer: b. An extraneous variable Correct Answer: b. An extraneous variable • Question 20 2 out of 2 points Which of the following statements is true? Selected Answer: c. Only the independent variable is manipulated in experimental research. Correct Answer: c. Only the independent variable is manipulated in experimental research. • Question 21 0 out of 2 points The goal of the ANOVA is to Selected Answer: b. correlate the means of two or more dependent variables. Correct Answer: c. compare the means on a dependent variable across levels of an independent variable. • Question 22 2 out of 2 points One difficulty of repeated-measures designs is that, due to the possibility of fatigue, practice, or carryover, the researcher may need to use Selected Answer: d. counterbalancing. Correct Answer: d. counterbalancing. • Question 23 2 out of 2 points Which of the following topics would be most appropriate to study as an independent variable in an experimental design? Selected Answer: d. participant mood Correct Answer: d. participant mood • Question 24 2 out of 2 points Whereas a correlation matrix contains a series of Pearson correlation coefficients, a contingency table contains Selected Answer: b. frequencies. Correct Answer: b. frequencies. • Question 25 2 out of 2 points A researcher found a positive correlation between income and job satisfaction in a sample of 100 adults. The researcher should conclude that Selected Answer: d. any of the above may be correct, but he cannot tell which. Correct Answer: d. any of the above may be correct, but he cannot tell which. • Question 26 2 out of 2 points A repeated-measures design refers to which of the following? Selected Answer: b. An experiment in which equivalence is created by having the same people participate in more than one condition. Correct Answer: b. An experiment in which equivalence is created by having the same people participate in more than one condition. • Question 27 0 out of 2 points The difference between the t test and the F test is that Selected Answer: b. the t test is used in calculating the ANOVA, whereas the F test is used in calculating the correlation coefficient. Correct Answer: a. the t test is used to compare two group means, whereas the F test is used to compare any number of means. • Question 28 2 out of 2 points Jarrod hypothesizes that getting plenty of sleep leads to lower blood pressure, and that lower blood pressure reduces stress. In this hypothesis, which of the following is the mediating variable? Selected Answer: c. Blood pressure Correct Answer: c. Blood pressure • Question 29 0 out of 2 points An experimenter studies the influence of ingesting sugar on memory. Children are randomly assigned either to eat a low calorie ice cream cone (low sugar condition) or a Ben and Jerry’s cone (high sugar condition). They are then asked to learn ten vocabulary words that they did not previously know, and the number of trials it takes to learn them is measured. The dependent variable in this experiment is Selected Answer: a. the type of ice cream cone. Correct Answer: b. the number of trials to learn. • Question 30 2 out of 2 points In a correlational research design, a spurious relationship is caused by Selected Answer: b. a common-causal variable. Correct Answer: b. a common-causal variable. Sunday, September 6, 2020 9:37:51 AM EDT