Psyc 255 Liberty LU Online Quiz 4

Question 25 2 out of 2 points Which of the following statements accurately describes the use of double-blind studies?

Selected Answer: Double-blind studies are a preferred technique because they can reduce the threats to internal validity.

Question 22 2 out of 2 points Which of the following is an accurate statement regarding the differences between extraneous and nuisance variables?

Selected Answer: Extraneous variables vary with the independent variable and nuisance variables are the same for all groups of participants.

Question 19 2 out of 2 points Which of the following is an accurate statement regarding the similarities between extraneous and nuisance variables?

Selected Answer: Research findings can be influenced by both variables in unwanted ways.

Question 28 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.

Selected Answer: attrition

Question 27 2 out of 2 points Psychological studies involve the use of many variables. Which of the following variables could bias research findings?

Selected Answer: both B and C

Question 24 2 out of 2 points Research should be designed to _________ for nuisance and extraneous variables.

Selected Answer: control

Question 1 2 out of 2 points Using the content in the textbook _____________ is to nonprobability sampling as _____________ is to probability sampling. ,

Selected Answer: convenience, simple

Question 7 2 out of 2 points The amount of overlap between populations being studied is called _____________.

Selected Answer: effect size

Question 26 2 out of 2 points Which of the following threats to internal validity would be of concern if an outbreak of salmonella in peanut butter occurred while a study was being conducted on perceptions of peanut butter?

Selected Answer: history

Question 30 2 out of 2 points When a change in the dependent variable could be due to changes in how the dependent variable was measured, _________ is a threat to internal validity.

Selected Answer: instrumentation

Question 18 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?

Selected Answer: maturation

Question 2 2 out of 2 points A _____________ sampling procedure occurs when not all individuals within a population have an equal likelihood or known probability of being selected.

Selected Answer: nonprobability

Question 16 2 out of 2 points Reflect on the Are You Equipped Now? section at the end of chapter 9. It may be such that participants wanted so strongly for this new treatment to work that they experienced pain relief. If this did indeed occur, which of the following was a threat to internal validity?

Selected Answer: placebo effect

Question 20 2 out of 2 points Imagine a study where participants were given Jell-O shots to consume before participating in experiments where reaction time was measured. However, to the participants' surprise, the Jell-O shots were not made with alcohol. When the participants were debriefed and told that the Jell-O contained no alcohol, some participants refused to drive home until they had sobered up. The participants' responses indicate that __________ was a threat to internal validity. ,

Selected Answer: placebo effect

Question 15 2 out of 2 points In a _____________ sampling procedure, each individual in a population has a known probability (or chance) of being selected for a study.

Selected Answer: probability

Question 9 2 out of 2 points The two main sampling techniques that researchers use are _____________ sampling and _____________ sampling.

Selected Answer: probability, nonprobability

Question 12 2 out of 2 points Which of the following is a type of nonprobability sampling procedure?

Selected Answer: quota

Question 8 2 out of 2 points Ingrid has begun work on a research project. She has decided to recruit participants from General Psychology classes. However, she plans to make sure that her sample matches the university population in terms of ethnicity (i.e., 53% should be Caucasian, 25% should be African American, and 22% should be Hispanic American). Ingrid is planning to use which nonprobability sampling procedure? ,

Selected Answer: quota

Question 14 2 out of 2 points In order to combat any threats to internal validity during sampling procedures, researchers should use _____________.

Selected Answer: random assignment

Question 6 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.

Selected Answer: random assignment

Question 21 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.

Selected Answer: regression to the mean

Question 10 2 out of 2 points Since it is not always possible to study an entire population of individuals, researchers will typically use a(n) _____________.

Selected Answer: sample

Question 11 2 out of 2 points Which of the following is not a type of nonprobability sampling procedure?

Selected Answer: simple

Question 13 2 out of 2 points In a _____________ probability sampling procedure, all individuals in a population have an equal probability of being selected.

Selected Answer: simple

Question 4 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.

Selected Answer: simple

Question 23 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.

Selected Answer: single-blind

Question 5 2 out of 2 points Which of the following is not one of the types of probability sampling procedures?

Selected Answer: snowballing

Question 29 2 out of 2 points When a change in the dependent variable could be due to participants' familiarity with the test, __________ is a threat to internal validity.

Selected Answer: testing

Question 17 2 out of 2 points Chapter 9 begins with an example regarding the TV show American Idol. The format of the show allows viewers to watch performances and, after hearing reviews of the judges, call in to vote for their favorite performer. The judges providing feedback before viewers vote could be a problem because __________.

Selected Answer: the judges give opinions that could influence the results

Question 3 2 out of 2 points Which of the following methods could be used in a simple probability sampling procedure?

Selected Answer: using a random number table to put participants in groups