1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
melomori [17]
3 years ago
12

Jared is conducting an experiment with ESP (extrasensory perception) training. He begins with a pretest of his 40 participants a

nd divides them into two groups based on their scores. The participants with the 20 lowest scores are given extensive training on how to detect the signals. The participants with the 20 highest scores are given no training. Both groups are retested and the average score of the participants with the training improved. Why can't Jared conclude that the training caused the difference?
a. testing effect

b. history effect

c. attrition / mortality effect

d. maturation effect

e. selection effect
Social Studies
1 answer:
MrMuchimi3 years ago
5 0

Answer: a. testing effect

Explanation:

Testing effect is a type of threat to internal validity of an experiment. Internal validity is assessing whether a factor makes a difference in an experiment or not and if it does, whether there is adequate evidence to support this correlation.

Testing as a threat to internal validity is when a second test is taken on the outcome of a first test. Other internal validity threats are history, maturation, instrument modifications.

You might be interested in
What are the forms of imperial rule
Olegator [25]
Protectorate - Local leaders following the advice of foreign advisors
Sphere of Influence - Outside power claims exclusive trading and investment privileges.
Direct Rule - Western country sends its own people to the country to rule it.
Indirect Rule - Would take a native ruler and teach/train them to run the country the way the Western nation wants.
5 0
3 years ago
Read 2 more answers
The leaders and activists who do the day-to-day work of making the party run are part of the...
Bogdan [553]

I think the answer is B

4 0
2 years ago
Read 2 more answers
The XYZ PAC operates on behalf of the XYZ interest group. Which campaign behavior of the XYZ PAC would be against current law? A
cupoosta [38]
<span>C. The PAC creates its own campaign for candidate Kroll and contributes to the campaign of candidate Loon" would be illegal since they can't communicate with candidates. </span>
7 0
3 years ago
Read 2 more answers
A 5 year-old might stop herself from hitting another child, because she has developed
agasfer [191]
The correct answer to this question is letter "b. emotional regulation." A 5 year-old might stop herself from hitting another child, because she has developed <span>emotional regulation. He or she knows what is the feeling of to being hurt or being loved.</span>
7 0
3 years ago
Write an essay about why these religions were appealing to people of ancient world
umka2103 [35]
Https://www.pbs.org/wgbh/pages/frontline/shows/religion/why/appeal.html

the first website is why christianity was appealing back then,
the second website is why islam religion was succesful

https://askanislamicist.wordpress.com/2014/07/14/why-was-the-islamic-expansion-successful/
6 0
3 years ago
Other questions:
  • How do you believe the Constitution should be taught in schools, especially with all the new resources that we have and the fact
    14·1 answer
  • A suggested answer to a question is a
    6·1 answer
  • What region of the country most likely experiences the greatest mechanical weathering?
    9·1 answer
  • How does practicing your observation skills improve your ability to detect and report adversarial surveillance?A. You will impro
    9·1 answer
  • Highlight the Features of facism​
    8·1 answer
  • A bureaucratic organization that functions mostly without executive or legislative control is known as
    13·1 answer
  • Latin America people generally live
    15·1 answer
  • I need help again... lol.. please help thanks!
    8·2 answers
  • A study of biological aging found that some people age _____ times faster than others, with about half of the difference between
    5·1 answer
  • Simple question: why is trade in the Aztec community Important? :)) please answer
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!