« previous next »

Author Question: There are 3 major threats to the validity of pre-experimental designs. They are _____. a. ... (Read 40 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?

Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

Did you know?

Hip fractures are the most serious consequences of osteoporosis. The incidence of hip fractures increases with each decade among patients in their 60s to patients in their 90s for both women and men of all populations. Men and women older than 80 years of age show the highest incidence of hip fractures.

Did you know?

Less than one of every three adults with high LDL cholesterol has the condition under control. Only 48.1% with the condition are being treated for it.

Did you know?

The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

Did you know?

Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.

Major Ridges and Trenches of the Seafloor Major Ridges and Trenches of the Seafloor
Canada's Major Fertilizer Producers and their Products Canada's Major Fertilizer Producers and their Products
Locations of major metabolic pathways within a eukaryotic cell Locations of major metabolic pathways within a eukaryotic cell
Major groups of forest biomes Major groups of forest biomes
Major Elements of the Genitourinary System Major Elements of the Genitourinary System
Video: Types of energy transfer reactions: oxidation-reduction reactions and ATP generation reactions

For a complete list of videos, visit our video library