Paragraph 2

Anonymous
timer Asked: Oct 17th, 2018
account_balance_wallet $5

Question Description

Please write a paragraph responding to the discussion bellow. Add citations and references in alphabetical order.

Extraneous Variables are undesirable variables that influence the relationship between the variables that an experimenter is examining. In other words, these are variables that influence the outcome of an experiment, though they are not the variables that are actually of interest. These variables are undesirable because they add error to an experiment. A major goal in research design is to decrease or control the influence of extraneous variables as much as possible. One of the most common types of confounding occurs when an experimenter does not or cannot randomly assign participants to groups, and some type of individual difference (e.g., ability, extroversion, shyness, height, weight) acts as a confounding variable. For example, let’s say that an educational psychologist has developed a new learning strategy and is interested in examining the effectiveness of this strategy. The experimenter randomly assigns students to two groups. All of the students study text materials on a biology topic for thirty minutes. One group uses the new strategy and the other uses a strategy of their choice. Then all students complete a test over the materials. One obvious confounding variable in this case would be pre-knowledge of the biology topic that was studied. This variable will most likely influence student scores, regardless of which strategy they use. Because of this extraneous variable (and surely others) there will be some spread within each of the groups. It would be better, of course, if all students came in with the exact same pre-knowledge. However, the experimenter has taken an important step to greatly increase the chances that, at least, the extraneous variable will add error variance equivalently between the two groups. That is, the experimenter randomly assigned students to the two groups.

Extraneous variables should be controlled if possible. One way to control extraneous variables is with random sampling. Random sampling does not eliminate any extraneous variable, it only ensures it is equal between all groups. If random sampling is not used, the effect that an extraneous variable can have on the study results becomes a lot more of a concern (explorepsycology, 2018).

References

Extraneous Variables. (n.d.). Retrieved from https://web.mst.edu/~psyworld/extraneous.htm.

Tutor Answer

Robert__F
School: Boston College

Please let me know if there is anything needs to be changed or added. I will be also appreciated that you can let me know if there is any problem or you have not received the work. Please let me know if there is anything needs to be changed or added.I will be also appreciated that you can let me know if there is any problem or you have not received the workGood luck in your study and if you need any further help in your assignments, please let me knowCan you please confirm if you have received the work? Once again, thanks for allowing me to help youR

Report: part 5 paragraph 2

part 5 paragraph 2
by HAL

General metrics
2,184

342

25

1 min 22 sec

2 min 37 sec

characters

words

sentences

reading
time

speaking
time

Writing...

flag Report DMCA
Review

Anonymous
awesome work thanks

Similar Questions
Related Tags

Brown University





1271 Tutors

California Institute of Technology




2131 Tutors

Carnegie Mellon University




982 Tutors

Columbia University





1256 Tutors

Dartmouth University





2113 Tutors

Emory University





2279 Tutors

Harvard University





599 Tutors

Massachusetts Institute of Technology



2319 Tutors

New York University





1645 Tutors

Notre Dam University





1911 Tutors

Oklahoma University





2122 Tutors

Pennsylvania State University





932 Tutors

Princeton University





1211 Tutors

Stanford University





983 Tutors

University of California





1282 Tutors

Oxford University





123 Tutors

Yale University





2325 Tutors