How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Chris M. Your Own Question

Chris M.
Chris M., M.S.W. Social Work
Category: Homework
Satisfied Customers: 2491
Experience:  Master's Degree, strong math and writing skills, experience in one-on-one tutoring (college English)
22285537
Type Your Homework Question Here...
Chris M. is online now
A new question is answered every 9 seconds

Jerry is concerned about whether his independent variable is

Resolved Question:

Jerry is concerned about whether his independent variable is the only possible explanation for the results of his experiment. Jerry is concerned about
a.
external validity.
b.
internal validity.
c.
reliability.
d.
convenience sampling.

Bonnie conducts an experiment to examine the effects of media on college women's body image. She gives a sample of women a body image questionnaire, then a week later exposes them to magazine photos of very thin models. Then a week later she administers a posttest designed to assess any changes in body image. Right before the posttest, a famous supermodel is reported to be suffering from anorexia; the story is on the cover of several magazines. Bonnie is concerned that the women's responses on the posttest may be influenced by the supermodel story instead of her independent variable. This example illustrates the potential problem of
a.
mortality.
b.
statistical regression.
c.
selection.
d.
history.

Stanley conducts a study in which he assesses teasing in a sample of first-graders during the first week of school and again three months later. Because the study is longitudinal, Stanley has to worry about which of the following threats to internal validity?
a.
selection
b.
temporal generalization
c.
demand characteristics
d.
maturation

Delia gives students a questionnaire on attitudes toward affirmative action. Then she shows her participants a movie on affirmative action. Then the participants fill out the same questionnaire again. Which of the following problems is most likely in Delia's study?
a.
reactive measures
b.
selection
c.
nonreactive measures
d.
Type III error

The "Sports Illustrated jinx" refers to the fact that athletes who appear on the cover of the magazine often then experience a decline in performance afterwards. Some researchers attribute this to the fact that athletes who are placed on the cover are those who are at the top of their game, and performance naturally reverts back to a more normal level after time. These researchers are referring to the problem of
a.
statistical regression.
b.
mortality.
c.
selection.
d.
instrumentation.

Andy conducts a study to improve reading scores in elementary schools. He obtains a sample of second-graders whose reading level was very much below average. He enrolls these students in a reading program and then measures their reading level six months later. Reading levels were significantly higher after the program than before. Because Andy selected participants on the basis of their extreme scores, he should be concerned about
a.
diffusion of treatment.
b.
statistical regression.
c.
temporal generalization.
d.
instrumentation.

Sasha conducts a study to compare self-esteem in American versus Swedish school children. She assesses the children at ages five, seven, and nine. Which of the following interactions is most likely?
a.
Selection-history interaction
b.
Selection-instrumentation interaction
c.
Selection-regression interaction
d.
Selection-generalization interaction

Angela conducts a study demonstrating that active learning strategies in a research methods course produce greater understanding of the material than passive learning strategies. She hopes that her results will apply to other research methods courses outside of the one she studied. Angela is concerned with
a.
demand characteristics.
b.
temporal generalization.
c.
environmental generalization.
d.
statistical regression.

Frances wishes to study the effects of violent videogames on children's levels of aggression. As children come to the lab for the study, she flips a coin. If it turns up heads, the child plays a violent videogame. If it turns up tails, the child plays a nonviolent videogame. Frances has used the technique of
a.
random selection.
b.
random assignment.
c.
creating matched pairs.
d.
correlated assignment.

Jamonn conducts a study in which one group of participants is randomly assigned to be in a 70-degree room, and another group of participants is randomly assigned to be in a 90-degree room. Jamonn will make a
a.
within-subjects comparison.
b.
matched-subjects comparison.
c.
between-subjects comparison.
d.
correlated-subjects comparison
Submitted: 2 years ago.
Category: Homework
Expert:  Chris M. replied 2 years ago.
THIS ANSWER IS LOCKED!
You can view this answer by clicking here to Register or Login and paying $3.
If you've already paid for this answer, simply Login.
Chris M., M.S.W. Social Work
Category: Homework
Satisfied Customers: 2491
Experience: Master's Degree, strong math and writing skills, experience in one-on-one tutoring (college English)
Chris M. and 12 other Homework Specialists are ready to help you

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
< Last | Next >
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland
  • He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here. Diane Dallas, TX
 
 
 

Meet The Experts:

 
 
 
  • Manal Elkhoshkhany

    Tutor

    Satisfied Customers:

    4520
    More than 5000 online tutoring sessions.
< Last | Next >
  • http://ww2.justanswer.com/uploads/BU/BusinessTutor/2012-2-2_115741_Kouki2.64x64.jpg Manal Elkhoshkhany's Avatar

    Manal Elkhoshkhany

    Tutor

    Satisfied Customers:

    4520
    More than 5000 online tutoring sessions.
  • http://ww2.justanswer.com/uploads/LI/lindaus/2012-6-10_04811_IMG20120609164157.64x64.jpg Linda_us's Avatar

    Linda_us

    Finance, Accounts & Homework Tutor

    Satisfied Customers:

    3121
    Post Graduate Diploma in Management (MBA)
  • http://ww2.justanswer.com/uploads/ComputersGuru/2010-02-13_051118_Photo41.JPG LogicPro's Avatar

    LogicPro

    Engineer

    Satisfied Customers:

    3035
    Expert in Java C++ C C# VB Javascript Design SQL HTML
  • http://ww2.justanswer.com/uploads/lanis/2009-4-1_233717_phput9xef_c1pm.jpg Lani S.'s Avatar

    Lani S.

    Tutor

    Satisfied Customers:

    2457
    Registered Nurse, Internet Researcher, Private Tutor
  • http://ww2.justanswer.com/uploads/chooser77/2009-08-18_162025_Chris.jpg Chris M.'s Avatar

    Chris M.

    M.S.W. Social Work

    Satisfied Customers:

    2341
    Master's Degree, strong math and writing skills, experience in one-on-one tutoring (college English)
  • http://ww2.justanswer.com/uploads/JawaadAhmed/2009-6-27_12137_SIs_SHadi.jpg F. Naz's Avatar

    F. Naz

    Chartered Accountant

    Satisfied Customers:

    1975
    Experience with chartered accountancy
  • http://ww2.justanswer.com/uploads/JK/jkcpa/2011-1-16_182614_jkcpa.64x64.jpg Bizhelp's Avatar

    Bizhelp

    CPA

    Satisfied Customers:

    1873
    Bachelors Degree and CPA with Accounting work experience