psych quiz
7,5,10,4,4 What is the median of the numbers above?
5
Researchers have found a negative correlation between income and dental 5/5 problems. What conclusion can correctly be drawn from this statement?
As incorne increases, the likelihood of dental problems decreases.
Which of the following is true of the frequency distributions shown in the graphs above?
Distribution B has more variation than distributions A or C.
Julie is interested in developing a test to measure achievement levels of middle school students. Which of the following domains of psychology is most applicable to Julie's interest?
Psychometric
Dr. Wilson, who teaches engineering classes, is interested in learning about 5/5 how lack of sleep affects performance. What would be the best way to ensure that her findings are generalizable to all the students at her university?
Surveying every tenth student listed in the university directory about their sleep habits
Dr. Rodriguez is interested in finding out if stress levels throughout the year 5/5 have a relationship with students' grades. The research method she most likely used is
a correlational study
Dr. Larson was interested in whether classical music helps students perform better on a test. Dr. Larson randomly assigned half of the study's participants to a group that listened to classical music while taking a test. The other half of the participants did not listen to music while taking a test. The research design Dr. Larson used is
an experiment
Kara works as a dog trainer. She reads a new book that describes some unusual training methods, and she wants to test them out on the dogs she works with. She assigns each dog to one of two groups by picking a number out of a hat. Half the dogs are assigned to one group, and half the dogs are assigned to the other group. For a month, she trains one group using her old methods and the other group using the unusual methods. At the end of the month. Kara records that the dogs that were trained with her old methods obey her 80 percent of the time and those that were trained with the unique methods obey her 90 percent of the time. Kara concludes that the unique methods work better. Kara can best improve her experimental design by
having someone else test the dogs
The most important reason to use operational definitions in psychological 5/5 research is it
helps everyone involved with the research understand and collect data in the same manner.
The benefit of using inferential statistics is that it allows a researcher to
make generalizations about a population
Jane Goodall lived among wild chimpanzees intermittently for decades, studying their social and family systems while keeping her interaction with the chimpanzees to a minimum. Her research method can most accurately be described as
naturalistic observation
A professor conducts a survey examining the relationship between pessimism and mental-health problems, and the results of her study are depicted in the scatterplot above. Which of the following types of relationship between pessimism and mental-health problems do her data suggest?
positive correlation
Dr. Sampson follows the structuralist school of thought. Her techniques would most likely include
presenting a participant with an object, such as a can of soda, and having the subject report his or her perceptions or experience of the can
Ms. Li, a principal, is interested in the differences in student behavior between two of the third-grade classrooms at her school. She asks the teachers, Mr. Williams, whose class meets at 9:00, and Ms. Walsh, whose class meets at 1:00, to record over a week the number of times students in their classrooms act out. Mr. Williams' class has 31 students, and Ms. Walsh's class has 32 students. "Acting out" is defined as students speaking without raising their hand or getting out of their seats without being given permission. At the end of the week, Mr. Williams reports that on average. his students acted out 73 times a day, and Ms. Walsh reports that, on average, her students acted out 27 times a day. Ms. Li decides that the students in Ms. Walsh's classroom act out more often than those in Mr. William's class. The results of this study are inconclusive because
the time of day was a confounding variable
Marjorie's little brother tends to bother her when he is bored. Marjorie wants to figure out which toy will keep her brother occupled the longest so he will not bother her. She conducts a study where each day at 6P.M. for a week she gives her brother a different toy and on one of the days she gives him no toys to play with. She measures the amount of time he spends playing with each toy before he comes to bother her. Which of the following Is the independent variable in this example?
type of toy
A researcher was interested in studying whether participants who were angry would become less angry if they had a chance to release their anger. At 10:00 in the morning, 6 students met individually with a confederate named Steve. They were each asked to write an essay, which Steve evaluated. He told each student, "This is the worst essay I ever read." They were then asked to sit in a room quietly for 10 minutes. At 1:00 in the afternoon, a second group of 6 students each wrote an essay, and Steve once again said the essays were the worst he had ever read. This second group was then asked to punch a punching bag. After either sitting quietly or punching the punching bag, the students were given the opportunity to blast a horn when Steve entered the room. The researcher operationally defined anger as the length of time that the students blasted the horn. The researcher assumed students who were given an opportunity to punch the punching bag would be less likely to blast the horn in Steve's presence The fable below indicstes how long, in seconds, each subject blasted the horn when Steve was present Assume all differences are significant.
The control group is the group that had to sit in silence. The confounding variable is that both groups were studied at different times of day. The independent variable is the punching of the bag, Part B The hypothesis was not supported because those who punched the punching bag actually blew the horn for longer that those who sat quietly. One way to correct it would be telling the subjects that it was an expiriment after it's over, so they don't leave feelings if they're unintelligent. The mean length of time is 95 seconds.
A researcher was interested in studying the effects of a new medication on 5/5 depression. One group received the new medication and another group received a standard medication for depression. The researcher asked participants to answer a series of questions rating their mood levels before and after six weeks of taking the medications. Which of the following is the control condition in this study?
The group receiving the standard medication
research consultont in a candy factory is developing exotic tasting jelly 10/10 Беалв. He hypothesized that experiencing exotic flavors would increase liking for traditional candy flavors. First, he had participants come into the lab, one at a time, and allowed them to eat as many felly beans as they wanted from a dish of 50 on the table. The flavors in the dish were cherry, tangerine, chocolate, lemon, and cotton candy. The next time they came into the lab, he mixed in new flavors that looked similar to the old ones but had unique flavors: rubber eraser, cough medicine, dirt, salt, pencil shavings. Finally, the same participants were brought in to the lab again to repeat the procedure from Time 1. The researcher kept track of how many jelly beans were consumed by each participant at each time, as shown in the table.
The independent varlable is the exotic flavors and the dependent varibale is the likelyhood to like tradiitonal flavors. Participant E is the outlier. The mean Jellybeans eaten at Time 1 is 28. (23+19+33+20+45)/5.The reasearchers hypothesis is supported because more everyone ate more jellybeans at time 1 when they fir tried the regular beans. It can be made experimental if there was a control group that only ate the llekly ones to compare it to the expiremental values he changed.
