psychology unit 2 check for understanding

{2,11,2,,3,3,4,2,5} what is the mode of the number set above? a. 2 b. 3 c. 4 d. 5 e. 9

a. 2

Ivan Pavlov was most well known for which of the following? a. conditioning digs to the sound of a bell b. studying what factors led to attachment in infant monkeys c. studying the different cognitive developmental stages of infants and children d. teaching pigeons to peck at specific stimuli e. placing cats in puzzle boxes

a. conditioning dogs to the sound of a bell

which procedure can reduce can reduce problems associated with the use of deception by a researcher? a. debriefing b. random sampling c. random assignment d. using only single-blind studies e. using only double-blind studies

a. debriefing

the most important reason to use operational definitions in psychological research is it... a. helps everyone involved with the research understand and collect data in the same manner b. assures that the data will be approved by the institutional review board (IRB) c. allows the researchers to turn a single-blind study into a double-blind study d. make sure that the data is collected in an ethical manner e. allows the researchers to infer causation

a. helps everyone involved with the research understand and collect data in the same manner

which of the following studies is from an evolutionary perspective? a. a study to see if people who had a more congruent view of their real self and their ideal self were happier b. a study to see if women were more attracted to men who liked children than men who did not like children c. a study examining whether children wanted to marry their opposite-sex parent when they grew up d. a study looking at how biological, psychological, and social factors affect development e. a study looking at how quickly a variable-ratio schedule of reinforcements leads to extinction resistant behaviors

b. a study to see if women were more attracted to men who liked children than men who did not like children

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... a. a case study b. an experiment c. naturalistic observation d. a correlational study e. a survey

b. an experiment

dr. patel is conducting a study to test hair-growth shampoo she is developing. she instructs fifty participants to use the hair-growth shampoo once daily for a month and another fifty to use a regular shampoo once a day for a month. dr. patel measures the participants' hair length at the beginning and the end of the thrity days. which of the following is the dependent variable? a. the type of shampoo b. change in hair length c. participants d. the placebo e. the thirty days

b. change in hair length

{-3,3,0,3,-3} what is the standard deviation of the numbers above? a. -3 b. 0 c. 3 d. 6 e. 9

c. 3

{12,3,3,4,8} what is the mean set of numbers above? a. 3 b. 8 c. 6 d. 12 e. 4

c. 6

dorthea dix was know for... a. becoming the first women to be appointed president of the american psychological association (APA) b. becoming the first women to be granted a Ph.D in psychology c. documenting the poor conditions of mental asylums, which eventually led to their reform d. being the first person to ever be called a psychologist e. conducting the little albert study

c. documenting the poor condition of mental asylums, which eventually led to their reform

marjorie's little brother tends to bother her when he is bored. marjorie wants to figure out which toy will keep her brother occupied the longest so he will not bother her. she conducts a study where each day at 6pm 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? a. time of day b. amount of time playing c. type of toy d. no toys e. the little brother

c. type of toy

there is a strong positive correlation between ice cream sales and instances of snakebites. which of the following is the most likely explanation for this correlation? a. ice cream sales cause humans to become more attractive to snakes b. snake bites cause humans to crave ice cream c. ice cream sales lead to people being outside more, which can potentially lead to snakes d. hot weather is related to both ice cream sales and snake activity e. increased traffic due to ice cream trucks disturbs the snakes, causing them to attack

d. hot weather is related to both ice cream sales and snake activity

professor Ahad has forty-three students in section one of the psychology classes she teaches and fifty-two students in section two. section one meets at eight a.m. and section two meets at one p.m. Professor Ahad concludes that her section one students are academically inferior to students in section two. the biggest problem with Professor Ahad's conclusion is that... a. she did not randomly assign the students to her classroom b. she needs an equal number of students in each class in order to draw comparisons c. there is no independent variable in this scenario d. time of day is a cofounding variable in this scenario e. she should have used the single-blind method

d. time of day is a cofounding variable in this scenario

what is the best way to ensure that results of a study are generalizable to a population? a. by making sure to use as many participants as possible b. by making sure the results are significant c. by making sure to use an equal number of men and women d. by using random assignment e. by using a random selection of people in that population

e. by using a random selection of people in that population

a researcher uses debriefing when he... a. uses deception in study b. has a study approved by the institutional review board c. has a study approved by the institutional animal care and use committee d. explains the purpose of a study before the study begins e. explains the true purpose of a study immediately after the study is complete

e. explains the true purpose of a study immediately after the study is complete

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... a. survey b. case study c. experiment d. correlational research e. naturalistic observation

e. naturalistic observation

the generalizability of a study increases when... a. the study is ethical b. an experiment is used c. debriefing is used d. confederates are used e. the sample is more representative of the population

e. the sample is more representative of the population