This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A student who is participating in a long term research project decides to stop participating and ... (Read 153 times)

abarnes

  • Hero Member
  • *****
  • Posts: 556
on: Jun 19, 2018
A student who is participating in a long term research project decides to stop participating and does not inform the experimenter of his decision. This is an example of which of the following threats to validity?
 
  a. Selection
  b. History
  c. Maturation
  d. Attrition

Question 2

Which of the following are threats to internal validity of the single-group before after design?
 
  a. Retesting threats
  b. Attrition threats
  c. Maturation threats
  d. All of the above are threats in this design.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

kristenb95

  • Sr. Member
  • ****
  • Posts: 318
Reply #1 on: Jun 19, 2018
Answer to Question 1

d

Answer to Question 2

d


abarnes

  • Hero Member
  • *****
  • Posts: 556
Reply #2 on: Jun 19, 2018
Thank you


kristenb95

  • Sr. Member
  • ****
  • Posts: 318
Reply #3 on: Jun 19, 2018
No problem :)


« previous next »
 

Did you know?

Certain topical medications such as clotrimazole and betamethasone are not approved for use in children younger than 12 years of age. They must be used very cautiously, as directed by a doctor, to treat any child. Children have a much greater response to topical steroid medications.

Did you know?

Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.

Did you know?

Chronic necrotizing aspergillosis has a slowly progressive process that, unlike invasive aspergillosis, does not spread to other organ systems or the blood vessels. It most often affects middle-aged and elderly individuals, spreading to surrounding tissue in the lungs. The disease often does not respond to conventionally successful treatments, and requires individualized therapies in order to keep it from becoming life-threatening.

Did you know?

Limit intake of red meat and dairy products made with whole milk. Choose skim milk, low-fat or fat-free dairy products. Limit fried food. Use healthy oils when cooking.

Did you know?

Adults are resistant to the bacterium that causes Botulism. These bacteria thrive in honey – therefore, honey should never be given to infants since their immune systems are not yet resistant.

Identify the Main Term Identify the Main Term
The number of research articles published on the topic of religious practices and spirituality have ... The number of research articles published on the topic of religious practices and spirituality have ...
The term “natural,” when used on the packaging of meat and poultry The term “natural,” when used on the packaging of meat and poultry
Flexible exchange rates are supposed to prevent long-term trade deficits. Flexible exchange rates are supposed to prevent long-term trade deficits.
A horizontal, 2.00 m long, 3.00 kg uniform beam that lies along the east-west di A horizontal, 2.00 m long, 3.00 kg uniform beam that lies along the east-west di
I need help fill up the chart attached phtoto long question I need help fill up the chart attached phtoto long question
Video: Structures that affect circulation - arterioles and vasomotor responses

For a complete list of videos, visit our video library