« previous next »

Author Question: The central threat to the internal validity of a simple interrupted time series design is a. ... (Read 72 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 average adult has about 21 square feet of skin.

Did you know?

To combat osteoporosis, changes in lifestyle and diet are recommended. At-risk patients should include 1,200 to 1,500 mg of calcium daily either via dietary means or with supplements.

Did you know?

Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

Did you know?

There are actually 60 minerals, 16 vitamins, 12 essential amino acids, and three essential fatty acids that your body needs every day.

Did you know?

Hypertension is a silent killer because it is deadly and has no significant early symptoms. The danger from hypertension is the extra load on the heart, which can lead to hypertensive heart disease and kidney damage. This occurs without any major symptoms until the high blood pressure becomes extreme. Regular blood pressure checks are an important method of catching hypertension before it can kill you.

The theoretical design of nature reserves, based on the tenets of island biogeography. The theoretical design of nature reserves, based on the tenets of island biogeography.
The Lion Gate of Mycenae (detail)—two lionesses flank the central column, c. 1300 B The Lion Gate of Mycenae (detail)—two lionesses flank the central column, c. 1300 B
The internal anatomy of the kidney. The internal anatomy of the kidney.
Tracheostomy. A tracheotomy, or incision into the trachea, is performed to create an opening into th Tracheostomy. A tracheotomy, or incision into the trachea, is performed to create an opening into th
Press into points along the neck with your thumb, one side at a time. Apply circular friction to ... Press into points along the neck with your thumb, one side at a time. Apply circular friction to ...
Simple Decorating Techniques: Side masking Simple Decorating Techniques: Side masking
Video: Structures that affect circulation - heart and MABP

For a complete list of videos, visit our video library