« previous next »

Author Question: There are 3 major threats to the validity of pre-experimental designs. They are _____. a. ... (Read 38 times)

roselinechinyere27m

  • Hero Member
  • *****
  • Posts: 557
on: Jun 19, 2018
There are 3 major threats to the validity of pre-experimental designs. They are _____.
 
  a. history, maturation, and testing
  b. selection, history, and generalization
  c. generalization, selection, and mortality
  d. selection, mortality and the selection by mortality interaction

Question 2

Naturalistic observation is rarely used by scientists because it does not make use of the scientific method.
 
  Indicate whether the statement is true or false


ttt030911

  • Sr. Member
  • ****
  • Posts: 315
Reply #1 on: Jun 19, 2018
Answer to Question 1

D
Selection, mortality, and the interaction between them present challenges to the validity of pre-experimental designs.

Answer to Question 2

F


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

roselinechinyere27m

  • Hero Member
  • *****
  • Posts: 557
Reply #2 on: Jun 19, 2018
Thank you


ttt030911

  • Sr. Member
  • ****
  • Posts: 315
Reply #3 on: Jun 19, 2018
No problem :)


« previous next »
 

Did you know?

The top 10 most important tips that will help you grow old gracefully include (1) quit smoking, (2) keep your weight down, (3) take supplements, (4) skip a meal each day or fast 1 day per week, (5) get a pet, (6) get medical help for chronic pain, (7) walk regularly, (8) reduce arguments, (9) put live plants in your living space, and (10) do some weight training.

Did you know?

Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.

Did you know?

Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.

Did you know?

Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

Did you know?

Drug abusers experience the following scenario: The pleasure given by their drug (or drugs) of choice is so strong that it is difficult to eradicate even after years of staying away from the substances involved. Certain triggers may cause a drug abuser to relapse. Research shows that long-term drug abuse results in significant changes in brain function that persist long after an individual stops using drugs. It is most important to realize that the same is true of not just illegal substances but alcohol and tobacco as well.

The Major Divisions of the Nervous System The Major Divisions of the Nervous System
Major Wind Systems: Monsoons Major Wind Systems: Monsoons
Major Categories of Long-Term Memory Major Categories of Long-Term Memory
Guide to Major Massage Therapy Organizations in the United States* Guide to Major Massage Therapy Organizations in the United States*
Major Structures of the Eye Major Structures of the Eye
Major features of human genome Major features of human genome
Video: Neuron structure and function - sensory neurons, association neurons & motor neurons

For a complete list of videos, visit our video library