Sometimes a behavior (like language) will not return to baseline ...

[jhjkgdfhk]

Sometimes a behavior (like language) will not return to baseline levels after your treatment has been successful. For example, a previously nonverbal child is unlikely to become nonverbal again after you successfully teach him to talk.
 
  So which design would be a bad choice, and which alternative design would be best?
 
 a. ABA; ABAB design
  b. changing criterion design; Interaction design
   c. ABA; multiple baseline design across participants
  d. interaction design, alternating treatments design

Question 2

Susan calls every 10th name in the student phone book to ask them to participate in her
  study. This is an example of ___________________ _____.
 
  a) simple random sampling
  b) stratified sampling
  c) convenience sampling
  d) quota sampling

[tsternbergh47]

Answer to Question 1

C

Answer to Question 2

b

[jhjkgdfhk]

TYSM

[cici]

Thanks for the timely response, appreciate it