« previous next »

Author Question: The central threat to the internal validity of a simple interrupted time series design is a. ... (Read 82 times)

ghost!

  • Hero Member
  • *****
  • Posts: 560
on: Jun 20, 2018
The central threat to the internal validity of a simple interrupted time series design is
 
  a. maturation
   b. contemporary history
  c. regression to the mean
  d. pretest sensitization
  e. selection bias

Question 2

A local history effect occurs
 
  a. because participants were not randomly assigned to groups
  b. when external validity is low
  c. as a result of regression to the mean
  d. all of the participants are from the same locality
   e. when groups experience different events other than the quasi-independent variable


xMRAZ

  • Sr. Member
  • ****
  • Posts: 363
Reply #1 on: Jun 20, 2018
Answer to Question 1

B

Answer to Question 2

E


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The Centers for Disease Control and Prevention has released reports detailing the deaths of infants (younger than 1 year of age) who died after being given cold and cough medications. This underscores the importance of educating parents that children younger than 2 years of age should never be given over-the-counter cold and cough medications without consulting their physicians.

Did you know?

Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.

Did you know?

Carbamazepine can interfere with the results of home pregnancy tests. If you are taking carbamazepine, do not try to test for pregnancy at home.

Did you know?

HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

Did you know?

One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.

A Simple Neural Model of Instrumental Conditioning A Simple Neural Model of Instrumental Conditioning
Shy children often have a high arousal level in novel social situations. Over time, parents can help ... Shy children often have a high arousal level in novel social situations. Over time, parents can help ...
Changes in Time Spent with Family Members Changes in Time Spent with Family Members
In early capitalism, children worked alongside adults. At that time, just as today, most street ... In early capitalism, children worked alongside adults. At that time, just as today, most street ...
Using a vacuum hose and a test light to ground one cylinder at a time on a distributorless ignition ... Using a vacuum hose and a test light to ground one cylinder at a time on a distributorless ignition ...
Bacteria with Internal Membranes Bacteria with Internal Membranes
Video: Acid-base imbalances - compensation of respiratory acidosis and alkalosis

For a complete list of videos, visit our video library