PSYCH 255 Quiz 4 practice questions and answers complete solution

PSYCH 255 Quiz 4 practice questions and answers complete solution Question 1  2 out of 2 points The two main sampling techniques that researchers use are sampling and sampling. Question 2  2 out of 2 points A sample in which not everyone in the population has an equal or known chance of being selected is called a sample. Question 3  2 out of 2 points In order to secure participants for his study, Jason uses class rosters from instructors. Jason selects every 5th person on the instructor’s class rosters for participation in his experiment. Jason is using sampling. Question 4  2 out of 2 points Since it is not always possible to study an entire population of individuals, researchers will typically use a(n) . Question 5  2 out of 2 points A researcher who places all potential participants for a study in a hat and randomly draws names for inclusion in their study is using a probability sampling procedure. Question 6  2 out of 2 points Stefani has identified several subgroups of individuals from the population she is studying. Stefani plans on randomly sampling participants from each of these subgroups. Stefani is using probability sampling. Question 7 Random sampling in which every kth person is selected for participation in a study is called sampling. Question 8  2 out of 2 points When using , the probability of being selected for participation changes with each selection of a participant. Question 9  2 out of 2 points When placing participants into conditions or groups for a study, researchers should use to ensure each participant has equal probability of being placed into each group. Question 10  2 out of 2 points The entire group of individuals in which you are interested in studying is called the . Question 11  2 out of 2 points A probability sampling technique in which a researcher begins by identifying subgroups and then randomly samples from each group is called probability sampling. Question 12  2 out of 2 points Lindsay is getting ready to conduct her study. She is aiming to get 100 participants to take her survey. Lindsay’s goal of 100 participants represents her . Question 13  2 out of 2 points The number of individuals that are selected to participate or that participate in a study is known as the . Question 14  2 out of 2 points A(n) is a group of people representative of the population who are selected to participate in the research. Question 15  2 out of 2 points In a study, Chris selected individuals by drawing names from a hat. Chris chooses one at a time and with each individual selected, he replaces the individual’s name back in the hat before selecting the next individual. Chris is using . Question 16  2 out of 2 points When a change in the dependent variable could be due to participants systematically dropping out of an experiment, is a threat to internal validity. Question 17  2 out of 2 points Which of the following statements accurately describes the use of double-blind studies? Question 18  2 out of 2 points Have you ever played a video game breaking the all-time high score only to find that you were never able to duplicate that performance? This is an example of , which is a threat to internal validity. Question 19  2 out of 2 points Reflect on the Are You Equipped Now? section at the end of chapter 9. If the decrease in pain reported by participants was due to internal changes that occurred within the participant over a three-month time period, which of the following was a threat to internal validity? Question 20  2 out of 2 points Which of the following statements regarding threats to internal validity is correct? Question 21  2 out of 2 points When a change in the dependent variable could be due to internal changes within the participant that occurred over time, is a threat to internal validity. Question 22  2 out of 2 points Which of the following is an accurate statement regarding the similarities between extraneous and nuisance variables? Question 23 Threats to internal validity are threats to saying .  2 out of 2 points Question 24  2 out of 2 points In a study, neither the participant nor the researcher knows which group a particular participants has been assigned. Question 25  2 out of 2 points variables are not controlled for in the experiment but may have an influence on the dependent variable because they vary with the levels of the independent variables. Question 26  2 out of 2 points When the change in the dependent variable could be due to extreme scores moving to the mean on subsequent testing, is a threat to internal validity. Question 27 variables are variables that influence all participants and cause the experimental results to be less clear.  2 out of 2 points Question 28  2 out of 2 points In a study, the participant has no knowledge of which group he or she has been assigned to, although the researcher knows. Question 29  2 out of 2 points When a change in the dependent variable could be due to the researcher somehow letting the participant know how s/he (the researcher) wants the participant to respond, or somehow the participant comes up with an idea as to how s/he (the participant) should respond, is a threat to internal validity. Chapter 9 outlined questions that you can ask yourself to determine if threats to internal validity are present in a study.