psy test 3 review
From an ethical standpoint, in what way is researching prisoners with tuberculosis similar to researching children with ADHD?
Both groups of participants have less autonomy than other types of participants.
When determining mediation, how many steps are necessary?
5
mc013-1.jpg Correlation 4 is an example of which of the following types of correlations?
cross-lag correlation
When examining the results of a multiple regression, which of the following should be compared to determine which predictor variables have the largest relationship to the criterion variable?
beta values
Imagine that Dr. Farah noted a cyclical, reinforcing relationship between homework and academic achievement. For this to be case, which of the following correlations would need to be significant?
correlations 3 and 4
If a person is asking whether the variables in an association claim are measured appropriately, _________ is being interrogated.
construct validity
RESEARCH STUDY 9.1: Dr. Farah is an educational psychologist who is interested in studying the potential causal relationship between doing homework and academic achievement. In January, Dr. Farah has her students report their fall GPA (a measure of academic achievement) and estimate how many hours they spent doing homework during a typical week in the fall semester. In May, Dr. Farah measures the same variables again (the estimated number of hours spent doing homework during a typical week in the spring semester and their spring GPA). She finds the following correlations. Variable A Variable B Correlation Coefficient Correlation 1 Fall number of hours of homework Fall semester GPA .83* Correlation 2 Fall number of hours of homework Spring number of hours of homework .36* Correlation 3 Fall number of hours of homework Spring semester GPA .69* Correlation 4 Fall semester GPA Spring number of hours of homework .18 Correlation 5 Fall semester GPA Spring semester GPA .45* Correlation 6 Spring number of hours of homework Spring semester GPA .80* *Indicates a statistically significant relationship. mc014-1.jpg Correlation 1 is an example of which of the following types of correlations?
cross-sectional correlation
Why is plagiarism a violation of ethics?
it violates an APA standard
Which of the following is true of multiple regression?
Adding more predictors means research is controlling for more variables.
In which of the following cases might a small effect still be important?
When the study has life-or-death implications
When examining an association claim using a bar graph, an association is indicated by which of the following?
a difference in the height between the bars
Which of the following is NOT a reason that psychologists might fabricate or falsify their data?
a journal might require it
Which of the following has been used as a defense of animal research by animal researchers?
Animal research has resulted in many benefits to both animals and humans.
RESEARCH STUDY 8.2: Dr. Moynihan conducts a study examining the relationship between the number of panic attacks a person experienced in the past month, the number of nightmares experienced in the past month, and people's levels of neuroticism (a personality trait characterized by instability, anxiety, and worry). She collects a convenience sample of 50 community college students (25 males, 25 females). Below are her findings. • A (number of panic attacks in the past month and neuroticism): r = −.03, not sig. • B (number of panic attacks in the past month and number of nightmares in the past month): r = −.14 (p = .05) • C (number of nightmares in the past month and neuroticism): r = .48 (p = .003). 1. Explain the three associations from Dr. Moynihan's study in terms of direction of each association (a), statistical significance (b), and effect size (c), using Cohen's benchmarks. 2. Of the three findings in Dr. Moynihan's study, which associations are statistically significant? What does it mean that an association is statistically significant? 3. Examining Dr. Moynihan's study and using the three criteria of causation, why can she not say that the number of panic attacks in the past month causes one to have fewer nightmares in the same month?
1. The association between number of panic attacks in the past month and neuroticism is not statistically significant, which is stated in the study. Since r is below -.10 it has a small or weak effect size. The association between number of panic attacks in the past month and number of nightmares in the past month is statistically significant because p is right at 5%. An r of -.14 shoes a medium or moderate effect size The associations between number of nightmares in the mast month and neuroticism is statistically significant. With p being .003 and below 5%, that makes it statistically significant. An r of .48 shows that it has a large effect size. 2. The association between number of panic attacks in the past month and number of nightmares in the past month and the associations between number of nightmares in the mast month and neuroticism are statistically significant associations. Statistically significant means a researcher reaches a conclusion about the likelihood of getting a correlation of that size by chance. 3. Using the three criterion of cause, we examine if there is a correlation between the cause and effect variable, which is not shown in this study. There is simply an assocation between the two variables. Also, the variable that causes must precede the variable it is effecting, which has not been shown here. Lastly, there must be no other explanations for this relationship which has not yet been investigated.
RESEARCH STUDY 9.1: Dr. Farah is an educational psychologist who is interested in studying the potential causal relationship between doing homework and academic achievement. In January, Dr. Farah has her students report their fall GPA (a measure of academic achievement) and estimate how many hours they spent doing homework during a typical week in the fall semester. In May, Dr. Farah measures the same variables again (the estimated number of hours spent doing homework during a typical week in the spring semester and their spring GPA). She finds the following correlations. Variable A Variable B Correlation Coefficient Correlation 1 Fall number of hours of homework Fall semester GPA .83* Correlation 2 Fall number of hours of homework Spring number of hours of homework .36* Correlation 3 Fall number of hours of homework Spring semester GPA .69* Correlation 4 Fall semester GPA Spring number of hours of homework .18 Correlation 5 Fall semester GPA Spring semester GPA .45* Correlation 6 Spring number of hours of homework Spring semester GPA .80* *Indicates a statistically significant relationship. mc016-1.jpg Based on her pattern of correlations, which of the following can Dr. Farah safely conclude?
Because Correlation 3 is significant but Correlation 4 is not, Dr. Farah has evidence that increased homework comes before academic achievement.
In which of the following ways is an institutional animal care and use committee (IACUC) different from an institutional review board (IRB)?
IACUCs monitor the care and treatment of animals throughout the study; IRBs do not monitor the care of human participants throughout the study.
All of the following are true of institutional review boards (IRBs) in the United States EXCEPT:
IRBs must have a psychologist as a member
Which of the following is true of statistical significance testing?
It can lead to an incorrect conclusion about the population.
A colleague of Dr. Farah's asks her why she did not simply conduct an experiment. Which of the following is a probable reason for Dr. Farah's choice not to conduct an experiment?
It would be unethical to manipulate whether students are told to do homework for a semester.
Which of the following is a necessary component of a longitudinal design?
Measuring the same variables at two points in time
Which of the following events did NOT occur in the Tuskegee Study?
Participants in the study were given/infected with the disease.
In considering whether research is ethical, which of the following are balanced against each other?
Risk to participants versus value of the knowledge gained
A researcher has examined a variety of correlational studies that point to a causal relationship between two variables. All of the studies have found a positive relationship between the two variables, but for ethical reasons, no experiments have been conducted. Using an approach of pattern and parsimony, the researcher may begin to make a causal claim by doing which of the following?
Specifying a mechanism or explanation for the causal relationship
Imagine you calculated the correlation coefficient for the data presented in the figure, and the resulting number was r = -.44. Looking at the figure, how would you know the number you calculated is incorrect?
The figure shows a positive relationship between optimism and life satisfaction.
If an association study did not select people for the study by using random sampling, which of the following statements is true?
The findings should be replicated in another population.
In order to create the figure, which of the following pieces of information would you need?
The mean optimism scores of people who voted and people who did not vote
RESEARCH STUDY 4.1: Dr. Kushner is planning on conducting a study next semester. He is curious as to whether sleep deprivation is associated with poorer cognitive performance. For example, if you sleep poorly the night before a big exam, will you do worse? Dr. Kushner is especially curious about selective sleep deprivation, where people are kept from entering REM (rapid eye movement) sleep. Using an electroencephalograph (EEG) to monitor brain waves, he plans to let participants sleep until they enter REM sleep and then wake them. After the participants are awake for one minute, Dr. Kushner plans to let them return to sleep. As they enter REM sleep again, he will wake them again and follow the same procedure. He plans to do this through the entire eight-hour sleep session. The following morning, participants will be asked to take a sample SAT test. Dr. Kushner asks his participants to provide informed consent. Doing this is adhering to which principle of the Belmont Report?
The principle of respect for persons
Which of the following is NOT true of finding a stronger effect size in an association claim?
There will be greater construct validity.
Which of the following is a reason why multiple regression designs are inferior to experimental designs?
They can only control for third variables that are measured.
All of the following are true of outliers EXCEPT:
They have the biggest effect when dealing with large sample sizes.
Why is it unethical to provide an incentive that is too large to refuse (for example, offering undergraduate students free tuition for a semester for participating in a study)?
it unduly influences people into participating
RESEARCH STUDY 8.1: Dr. Guidry conducts a study examining the relationship between the number of friends one has and the experience of daily stress and life satisfaction. She randomly samples 1,500 elderly men and women in Nashville, Tennessee (the state capital), located in the southern United States. Below are her findings. • Life satisfaction and experience of daily stress: r = −.57 (p = .01) • Number of friends one has and experience of daily stress: r = .09, not sig. • Number of friends one has and life satisfaction: r = .36 (p = .04) Comparing all three correlations, Dr. Guidry will be most able to accurately predict life satisfaction from the experience of daily stress because the relationship:
has the largest effect size
RESEARCH STUDY 9.2: Dr. Finkel is a social psychologist who studies romantic relationships. Several researchers have found that there is a link between income and marital satisfaction (e.g., Dakin & Wampler, 2012). Dr. Finkel is curious as to whether there is a causal link between the two variables, such that having a higher income causes higher levels of marital satisfaction. He is confident that he cannot reasonably or ethically manipulate people's income level, so he decides to use a multivariate design. He is also curious as to whether there is a causal link between these two variables or if two other variables (number of arguments and life satisfaction) can explain the relationship. He measures his three variables in a sample of 124 married couples recruited from a local community center. Below are his results. DV: Marital Satisfaction Variable Beta (β) Significance (ρ) Income .69 .03 Number of arguments −.73 .01 Life satisfaction .13 .81 Which of the following is NOT a predictor variable in Dr. Finkel's study?
marital satisfaction
If a researcher is asking why the relationship between two variables exists, she is curious about which of the following?
mediation
RESEARCH STUDY 8.1: Dr. Guidry conducts a study examining the relationship between the number of friends one has and the experience of daily stress and life satisfaction. She randomly samples 1,500 elderly men and women in Nashville, Tennessee (the state capital), located in the southern United States. Below are her findings. • Life satisfaction and experience of daily stress: r = −.57 (p = .01) • Number of friends one has and experience of daily stress: r = .09, not sig. • Number of friends one has and life satisfaction: r = .36 (p = .04) Dr. Guidry finds that the relationship between the number of friends one has and life satisfaction is stronger for men than for women. In this study, sex (male or female) is considered a(n):
moderator
According to the Belmont Report, which of the following groups of people is entitled to special protection?
people with developmental disabilities
A study finds a correlation coefficient of r = .52 and reports p < .05. The p is a _________.
probability estimate
Why are curvilinear relationships hard to detect with correlation coefficients (r)?
r always looks for the best straight line to fit the data.
RESEARCH STUDY 9.3: Dr. Cheong is a clinical psychologist who is curious about how people deal with natural disasters (e.g., hurricanes, tornados, earthquakes). His previous research suggests that there is a relationship between how much people feel their emotional well-being was affected by the natural disaster and their likelihood of developing posttraumatic stress disorder (PTSD) symptoms. However, he is curious as to whether the effect of emotional well-being occurs because people receive different levels of social support. He conducts a study in which he asks 174 men and women affected by Hurricane Sandy (2012) to report on how their well-being was affected by the hurricane, the social support felt after the storm, and the number of PTSD symptoms. Dr. Cheong finds support for his proposed relationship. However, in examining his data more closely, he finds that the relationship between emotional well-being and PTSD symptoms is stronger for men than for women. Which of the following is the mediating variable in Dr. Cheong's hypothesis?
social support
Which of the following is true of students' views of deception and harm in research studies?
students can find deception to be stressful
The aim of the Tuskegee Study was to examine which disease?
syphilis
In addition to being ethical violations, why are data falsification and fabrication problematic?
they impede scientific progress
RESEARCH STUDY 4.1: Dr. Kushner is planning on conducting a study next semester. He is curious as to whether sleep deprivation is associated with poorer cognitive performance. For example, if you sleep poorly the night before a big exam, will you do worse? Dr. Kushner is especially curious about selective sleep deprivation, where people are kept from entering REM (rapid eye movement) sleep. Using an electroencephalograph (EEG) to monitor brain waves, he plans to let participants sleep until they enter REM sleep and then wake them. After the participants are awake for one minute, Dr. Kushner plans to let them return to sleep. As they enter REM sleep again, he will wake them again and follow the same procedure. He plans to do this through the entire eight-hour sleep session. The following morning, participants will be asked to take a sample SAT test. Imagine that Dr. Kushner is a clinical psychologist who volunteers his time at a local prison counseling several inmates. Because of his connections there, he is considering using prisoners as his participants. Why is this choice potentially problematic?
According to the Belmont Report, prisoners are entitled to special protection.
RESEARCH STUDY 8.1: Dr. Guidry conducts a study examining the relationship between the number of friends one has and the experience of daily stress and life satisfaction. She randomly samples 1,500 elderly men and women in Nashville, Tennessee (the state capital), located in the southern United States. Below are her findings. • Life satisfaction and experience of daily stress: r = −.57 (p = .01) • Number of friends one has and experience of daily stress: r = .09, not sig. • Number of friends one has and life satisfaction: r = .36 (p = .04) Which of the following conclusions can Dr. Guidry draw about the number of friends one has and life satisfaction based on her statistical analyses?
The probability of her sample coming from a zero association population is about 4%.
Which of the following graph formats is the best way to examine an association claim between a categorical variable and a quantitative variable?
a bar graph
Why would a researcher interested in making a causal claim NOT do an experiment?
There may be ethical limitations of manipulating a variable.
RESEARCH STUDY 9.1: Dr. Farah is an educational psychologist who is interested in studying the potential causal relationship between doing homework and academic achievement. In January, Dr. Farah has her students report their fall GPA (a measure of academic achievement) and estimate how many hours they spent doing homework during a typical week in the fall semester. In May, Dr. Farah measures the same variables again (the estimated number of hours spent doing homework during a typical week in the spring semester and their spring GPA). She finds the following correlations. Variable A Variable B Correlation Coefficient Correlation 1 Fall number of hours of homework Fall semester GPA .83* Correlation 2 Fall number of hours of homework Spring number of hours of homework .36* Correlation 3 Fall number of hours of homework Spring semester GPA .69* Correlation 4 Fall semester GPA Spring number of hours of homework .18 Correlation 5 Fall semester GPA Spring semester GPA .45* Correlation 6 Spring number of hours of homework Spring semester GPA .80* *Indicates a statistically significant relationship. mc009-1.jpg Of the correlations listed in the table, how many are autocorrelations?
two
RESEARCH STUDY 4.1: Dr. Kushner is planning on conducting a study next semester. He is curious as to whether sleep deprivation is associated with poorer cognitive performance. For example, if you sleep poorly the night before a big exam, will you do worse? Dr. Kushner is especially curious about selective sleep deprivation, where people are kept from entering REM (rapid eye movement) sleep. Using an electroencephalograph (EEG) to monitor brain waves, he plans to let participants sleep until they enter REM sleep and then wake them. After the participants are awake for one minute, Dr. Kushner plans to let them return to sleep. As they enter REM sleep again, he will wake them again and follow the same procedure. He plans to do this through the entire eight-hour sleep session. The following morning, participants will be asked to take a sample SAT test. Which of the following is true regarding obtaining informed consent in Dr. Kushner's study?
He needs to obtain informed consent because there is a likelihood of risk in his study.
RESEARCH STUDY 8.1: Dr. Guidry conducts a study examining the relationship between the number of friends one has and the experience of daily stress and life satisfaction. She randomly samples 1,500 elderly men and women in Nashville, Tennessee (the state capital), located in the southern United States. Below are her findings. • Life satisfaction and experience of daily stress: r = −.57 (p = .01) • Number of friends one has and experience of daily stress: r = .09, not sig. • Number of friends one has and life satisfaction: r = .36 (p = .04) In determining whether the relationship between two of Dr. Guidry's variables was statistically significant, which of the following must be considered?
Sample size and effect size
RESEARCH STUDY 4.1: Dr. Kushner is planning on conducting a study next semester. He is curious as to whether sleep deprivation is associated with poorer cognitive performance. For example, if you sleep poorly the night before a big exam, will you do worse? Dr. Kushner is especially curious about selective sleep deprivation, where people are kept from entering REM (rapid eye movement) sleep. Using an electroencephalograph (EEG) to monitor brain waves, he plans to let participants sleep until they enter REM sleep and then wake them. After the participants are awake for one minute, Dr. Kushner plans to let them return to sleep. As they enter REM sleep again, he will wake them again and follow the same procedure. He plans to do this through the entire eight-hour sleep session. The following morning, participants will be asked to take a sample SAT test. Dr. Kushner is deciding whether he needs to give participants a reason for waking them up several times during the night. He knows that he cannot tell them the real reason, but he is unsure whether he should deceive them (give them a false reason why he is waking them up) or provide them with no cover story at all. Which of the following issues should be considered most heavily when deciding whether to use deception?
Whether he can conduct the study just as well without deception
RESEARCH STUDY 9.1: Dr. Farah is an educational psychologist who is interested in studying the potential causal relationship between doing homework and academic achievement. In January, Dr. Farah has her students report their fall GPA (a measure of academic achievement) and estimate how many hours they spent doing homework during a typical week in the fall semester. In May, Dr. Farah measures the same variables again (the estimated number of hours spent doing homework during a typical week in the spring semester and their spring GPA). She finds the following correlations. Variable A Variable B Correlation Coefficient Correlation 1 Fall number of hours of homework Fall semester GPA .83* Correlation 2 Fall number of hours of homework Spring number of hours of homework .36* Correlation 3 Fall number of hours of homework Spring semester GPA .69* Correlation 4 Fall semester GPA Spring number of hours of homework .18 Correlation 5 Fall semester GPA Spring semester GPA .45* Correlation 6 Spring number of hours of homework Spring semester GPA .80* *Indicates a statistically significant relationship. mc010-1.jpg Which of the following correlations is a cross-sectional correlation?
correlation 6
RESEARCH STUDY 4.1: Dr. Kushner is planning on conducting a study next semester. He is curious as to whether sleep deprivation is associated with poorer cognitive performance. For example, if you sleep poorly the night before a big exam, will you do worse? Dr. Kushner is especially curious about selective sleep deprivation, where people are kept from entering REM (rapid eye movement) sleep. Using an electroencephalograph (EEG) to monitor brain waves, he plans to let participants sleep until they enter REM sleep and then wake them. After the participants are awake for one minute, Dr. Kushner plans to let them return to sleep. As they enter REM sleep again, he will wake them again and follow the same procedure. He plans to do this through the entire eight-hour sleep session. The following morning, participants will be asked to take a sample SAT test. Dr. Kushner's decision about the type of participants to recruit should be informed by which of the following principles of the Belmont Report?
the principle of justice
