« previous next »

Author Question: The threat to internal validity that occurs when external events or conditions affect one group more ... (Read 53 times)

Jipu 123

  • Hero Member
  • *****
  • Posts: 569
on: Jul 8, 2018
The threat to internal validity that occurs when external events or conditions affect one group more than another is the threat known as:
 
  A) Maturation
  B) Selection
  C) Testing
  D) History

Question 2

Most evidence hierarchies put which of the following at the pinnacle?
 
  A) Randomized clinical trials
  B) Program evaluations
  C) Quality improvement projects
  D) Meta-analyses of multiple clinical trials


polinasid

  • Sr. Member
  • ****
  • Posts: 344
Reply #1 on: Jul 8, 2018
Answer to Question 1

D

Answer to Question 2

D


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

Did you know?

In women, pharmacodynamic differences include increased sensitivity to (and increased effectiveness of) beta-blockers, opioids, selective serotonin reuptake inhibitors, and typical antipsychotics.

Did you know?

Bisphosphonates were first developed in the nineteenth century. They were first investigated for use in disorders of bone metabolism in the 1960s. They are now used clinically for the treatment of osteoporosis, Paget's disease, bone metastasis, multiple myeloma, and other conditions that feature bone fragility.

Did you know?

Russia has the highest death rate from cardiovascular disease followed by the Ukraine, Romania, Hungary, and Poland.

Did you know?

The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.

External female genitalia External female genitalia
Internal anatomy of a female cricket Internal anatomy of a female cricket
Conditions Treated by Physical Therapy Conditions Treated by Physical Therapy
Write a net ionic equation for the precipitation reaction that occurs. Write a net ionic equation for the precipitation reaction that occurs.
In the drawing of acetaldehyde, CH3CHO, the largest partial negative charge (-) occurs on In the drawing of acetaldehyde, CH3CHO, the largest partial negative charge (-) occurs on
Video: Introduction to Genetics

For a complete list of videos, visit our video library