Question 1

A company pays one group of workers weekly and another group,randomly chosen,once a month.It compares the workers' effectiveness.What is the independent variable in this experiment?​

Accepted Answer

The independent variable in this experiment is the frequency of pay, as this is the variable that is being manipulated and compared to see its effect on worker effectiveness. The other options listed are not being manipulated in this experiment.

Question 2

Suppose someone finds that people who drank coffee got less sleep than those who didn't.To know whether this statement came from an experiment or a correlation,which question should we ask?​

Accepted Answer

This question helps determine whether the study was an experiment (randomly assigned groups) or a correlation (participants self-selected their group). Knowing this is important in understanding the cause-and-effect relationship between coffee consumption and sleep.

Question 3

A researcher asks people to drink coffee before or after reading an essay,and later compares the memory of the two groups.What is the dependent variable in this experiment?​

Accepted Answer

The dependent variable is the outcome that is being measured, which in this case is the memory performances of the participants after they read the essay and depending on whether they drank coffee before or after reading.

Question 4

A researcher tests learning for one group of rats in a cold room and for another group in a warm room.What is the independent variable in this experiment?​

Accepted Answer

The independent variable is the variable that is being manipulated and tested to see its effect on the dependent variable. In this case, the independent variable is the temperature of the room because it is being changed to see how it affects the rats' learning performance, which is the dependent variable.

Question 5

A professor presents a test in black ink for half the students and in red ink for the other half,and compares the students' test scores.What is the dependent variable in this experiment?​

Accepted Answer

The dependent variable in this experiment is the students' test scores because it is what is being compared between the two groups. The independent variable is the color of ink used on the test. The other options are not relevant to the comparison being made in this experiment.

Question 6

To determine the effect of distraction,an experimenter tests the memory of people who try to read aChapter while listening to loud music.What will the control group do?​

Accepted Answer

The control group should be reading the chapter without the added variable of loud music to determine if any effects on memory are due to the music or some other factor. By having a group read the chapter without music, the experimenter can compare their results to the group who read and listened to music to determine if the distraction had an effect on memory.

Question 7

A track coach asks half of the athletes,chosen randomly,to try wearing a new type of shoe.Later the coach compares results for those wearing the new and old shoe types.What is the dependent variable in this experiment?​

Accepted Answer

The dependent variable in this experiment is the athletes' performances because they are being compared between those wearing the old and new shoe types. The type of shoe is the independent variable, and the coach and weather variations are not relevant to the dependent variable.

Question 8

A store plays background music on some days,randomly chosen,and none on other days.It compares sales on the two kinds of days.What is the independent variable in this experiment?​

Accepted Answer

The independent variable in this experiment is the presence or absence of music. The store is comparing sales on days when music is played versus days when it is not played, making the presence or absence of music the variable being manipulated. Factors such as the workers in the store, volume of sales, and variations in weather are not being intentionally manipulated and therefore cannot be considered as the independent variable.

Question 9

What is an independent variable?​

Accepted Answer

An independent variable is something that the researcher intentionally manipulates or controls in an experiment. This is done to see how changes in the independent variable affect the dependent variable.

Question 10

To which of the following does an experimenter apply "random assignment"?​

Accepted Answer

Random assignment is the process of assigning research participants to different groups or conditions randomly. Therefore, the experimenter would apply random assignment to the research participants.

Question 11

A track coach asks half of the athletes,chosen randomly,to try wearing a new type of shoe.Later the coach compares results for those wearing the new and old shoe types.What is the independent variable in this experiment?​

Accepted Answer

The independent variable in this experiment is the type of shoe, as it is the variable that is being manipulated by the coach in order to compare the results of those wearing the new shoe versus the old shoe.

Question 12

A professor presents a test in black ink for half the students and in red ink for the other half,and compares the students' test scores.What is the independent variable in this experiment?​

Accepted Answer

The independent variable is the variable that is being manipulated by the researcher, which is the color of ink on the test in this case.

Question 13

What is a dependent variable?​

Accepted Answer

The dependent variable is the variable that is measured to determine the outcome or the effect of the change in the independent variable. It is the variable that is affected by or depends on the independent variable. For example, if the independent variable is the amount of fertilizer given to plants, the dependent variable would be the growth rate of the plants.

Question 14

A researcher tests learning for one group of rats in a cold room and for another group in a warm room.What is the dependent variable in this experiment?​

Accepted Answer

The dependent variable is the variable that is being tested or measured, in this case, it is the rats' learning performance, as this is the variable that is being compared between the two groups in different temperature conditions. The experimenter, temperature of the room, and size of the room are not dependent variables, as they are not being tested or compared in this experiment, but rather are independent or control variables.

Question 15

After all people in an experiment watch a movie,those in the experimental group get hypnotized before trying to remember details from the movie.What will the control group in this experiment do?​

Accepted Answer

The control group serves as a baseline comparison group, therefore they should answer the questions without being hypnotized to compare their memory performance to the experimental group's memory performance while being hypnotized.

Question 16

A company pays one group of workers weekly and another group,randomly chosen,once a month.It compares the workers' effectiveness.What is the dependent variable in this experiment?​

Accepted Answer

The dependent variable, which is the variable that is being measured and compared between the two groups of workers, is the workers' job effectiveness. The frequency of pay, difficulty of the job, and daily weather variations are not the focus of the experiment and are therefore not the dependent variable.

Question 17

If people in the experimental group get some drug that might improve memory,what do people in the control group do?​

Accepted Answer

The control group serves as a comparison group, so they need to receive some type of treatment, but it should not be the same treatment as the experimental group. In this case, they would receive an ineffective chemical (placebo) to control for any placebo effects or other factors that may affect the outcome.

Question 18

In which type of study would participants be randomly assigned to groups?​

Accepted Answer

Random assignment is a key feature of experiments, where participants are randomly assigned to different groups to ensure that any observed differences are due to the manipulation of the independent variable rather than pre-existing differences between the groups. The other options (A, B, D) do not involve random assignment of participants.

Question 19

A store plays background music on some days,randomly chosen,and none on other days.It compares sales on the two kinds of days.What is the dependent variable in this experiment?​

Accepted Answer

The dependent variable in this experiment is the volume of sales, as it is the variable that is being affected and measured by the presence or absence of music. The other options (A, C, and D) are not directly related to the variable being measured in the experiment.

Question 20

A researcher asks people to drink coffee before or after reading an essay,and later compares the memory of the two groups.What is the independent variable in this experiment?​

Accepted Answer

The independent variable in this experiment is the time of drinking coffee as it is the variable that is manipulated by the researcher (i.e. before or after reading the essay) to examine its effect on memory performance. The nature of the essay, memory performances, and brand of coffee are all potential dependent variables that may be influenced by the independent variable (time of drinking coffee) and are therefore not considered independent variables.

Quiz 2: Scientific Methods in Psychology

A company pays one group of workers weekly and another group,randomly chosen,once a month.It compares the workers' effectiveness.What is the independent variable in this experiment?​

Suppose someone finds that people who drank coffee got less sleep than those who didn't.To know whether this statement came from an experiment or a correlation,which question should we ask?​

A researcher asks people to drink coffee before or after reading an essay,and later compares the memory of the two groups.What is the dependent variable in this experiment?​

A researcher tests learning for one group of rats in a cold room and for another group in a warm room.What is the independent variable in this experiment?​

A professor presents a test in black ink for half the students and in red ink for the other half,and compares the students' test scores.What is the dependent variable in this experiment?​

To determine the effect of distraction,an experimenter tests the memory of people who try to read aChapter while listening to loud music.What will the control group do?​

A track coach asks half of the athletes,chosen randomly,to try wearing a new type of shoe.Later the coach compares results for those wearing the new and old shoe types.What is the dependent variable in this experiment?​

A store plays background music on some days,randomly chosen,and none on other days.It compares sales on the two kinds of days.What is the independent variable in this experiment?​

What is an independent variable?​

To which of the following does an experimenter apply "random assignment"?​

A track coach asks half of the athletes,chosen randomly,to try wearing a new type of shoe.Later the coach compares results for those wearing the new and old shoe types.What is the independent variable in this experiment?​

A professor presents a test in black ink for half the students and in red ink for the other half,and compares the students' test scores.What is the independent variable in this experiment?​

What is a dependent variable?​

A researcher tests learning for one group of rats in a cold room and for another group in a warm room.What is the dependent variable in this experiment?​

After all people in an experiment watch a movie,those in the experimental group get hypnotized before trying to remember details from the movie.What will the control group in this experiment do?​

A company pays one group of workers weekly and another group,randomly chosen,once a month.It compares the workers' effectiveness.What is the dependent variable in this experiment?​

If people in the experimental group get some drug that might improve memory,what do people in the control group do?​

In which type of study would participants be randomly assigned to groups?​

A store plays background music on some days,randomly chosen,and none on other days.It compares sales on the two kinds of days.What is the dependent variable in this experiment?​

A researcher asks people to drink coffee before or after reading an essay,and later compares the memory of the two groups.What is the independent variable in this experiment?​

A company pays one group of workers weekly and another group,randomly chosen,once a month.It compares the workers' effectiveness.What is the independent variable in this experiment?

Suppose someone finds that people who drank coffee got less sleep than those who didn't.To know whether this statement came from an experiment or a correlation,which question should we ask?

A researcher asks people to drink coffee before or after reading an essay,and later compares the memory of the two groups.What is the dependent variable in this experiment?

A researcher tests learning for one group of rats in a cold room and for another group in a warm room.What is the independent variable in this experiment?

A professor presents a test in black ink for half the students and in red ink for the other half,and compares the students' test scores.What is the dependent variable in this experiment?

To determine the effect of distraction,an experimenter tests the memory of people who try to read aChapter while listening to loud music.What will the control group do?

A track coach asks half of the athletes,chosen randomly,to try wearing a new type of shoe.Later the coach compares results for those wearing the new and old shoe types.What is the dependent variable in this experiment?

A store plays background music on some days,randomly chosen,and none on other days.It compares sales on the two kinds of days.What is the independent variable in this experiment?

What is an independent variable?

To which of the following does an experimenter apply "random assignment"?

A track coach asks half of the athletes,chosen randomly,to try wearing a new type of shoe.Later the coach compares results for those wearing the new and old shoe types.What is the independent variable in this experiment?

A professor presents a test in black ink for half the students and in red ink for the other half,and compares the students' test scores.What is the independent variable in this experiment?

What is a dependent variable?

A researcher tests learning for one group of rats in a cold room and for another group in a warm room.What is the dependent variable in this experiment?

After all people in an experiment watch a movie,those in the experimental group get hypnotized before trying to remember details from the movie.What will the control group in this experiment do?

A company pays one group of workers weekly and another group,randomly chosen,once a month.It compares the workers' effectiveness.What is the dependent variable in this experiment?

If people in the experimental group get some drug that might improve memory,what do people in the control group do?

In which type of study would participants be randomly assigned to groups?

A store plays background music on some days,randomly chosen,and none on other days.It compares sales on the two kinds of days.What is the dependent variable in this experiment?

A researcher asks people to drink coffee before or after reading an essay,and later compares the memory of the two groups.What is the independent variable in this experiment?