A researcher might enlarge an ABA design to an ABABABA design ...

[clippers!]

A researcher might enlarge an ABA design to an ABABABA design
 
  a. to reduce an error variance
  b. to examine the generalizability of the effect to other participants
  c. to conduct an intraparticipant replication
  d. to create a multiple-I design
  e. to establish a multiple baseline

Question 2

If the effects of an independent variable do not reverse when the variable is withdrawn in an ABA design
 
  a. the researcher concludes that the independent variable did not affect the participant's behavior
  b. the researcher introduces another level of the independent variable
  c. the researcher re-introduces the same level of the independent variable
  d. it is unclear whether behavior was affected by the independent variable
  e. the effects of the independent variable were only temporary

[wilsonbho]

Answer to Question 1

c

Answer to Question 2

d

[clippers!]

Thank you!

[wilsonbho]

Happy to help