Explain the difference between assignment bias and selection ...

[CBme]

Explain the difference between assignment bias and selection bias. Which one is a threat to internal validity and which is a threat to external validity?
 
  What will be an ideal response?

Question 2

The more a study is replicated in different contexts, the stronger the internal validity will be.
 
  a. True
  b. False
  Indicate whether the statement is true or false

[yasmina]

Answer to Question 1

Selection bias means that the selection process produces a sample that is not representative of the population. Because the sample is not representative, it limits the ability to generalize the results from the sample which is a threat to external validity. Assignment bias occurs when the process used to assign different participants to different treatments produces groups of individuals with noticeably different characteristics. Assignment bias is a threat to internal validity because it allows an alternative explanation for any differences observed between the treatment conditions.

Answer to Question 2

False

[CBme]

Wow, this really help

[amandalm]

Thanks for the timely response, appreciate it