Which of the following experimental designs would have the ...

[panfilo]

Which of the following experimental designs would have the strongest external validity?
 
  a. One-group pretest-posttest design
  b. Randomized subjects, posttest-only, control-group design
  c. Randomized subjects, pretest-posttest, control-group design
  d. Nonrandomized pretest-posttest, control-group design

Question 2

Distinguish between score validity and reliability.
 
  What will be an ideal response?

[Danny Ewald]

Answer to Question 1

B

Answer to Question 2

Validity refers to the extent to which scores on a test enable one to make meaningful and appropriate interpretations. Does the test measure what it claims to measure? Reliability refers to how consistently a test measures whatever it is purported to measure.

[panfilo]

Excellent

[xoxo123]

Thanks for the timely response, appreciate it