When an experiment produces null results a. it is possible ...

[lidoalex]

When an experiment produces null results
 
  a. it is possible that the experimenter did not use a valid manipulation of the independent variable.
  b. it shows that the independent variable manipulation produced a change in the dependent variable.
  c. it shows that the dependent variable had no effect on the independent variable.
  d. it is possible that the effect of the independent variable occurred by chance.

Question 2

Identify the three types of multiple-baseline designs discussed in the text.
 
  What will be an ideal response?

[cclemon1]

Answer to Question 1

A

Answer to Question 2

The first design is a multiple-baseline across participants in which measures are taken at baseline and after the introduction of the independent variable at different times across multiple participants. The second design is a multiple-baseline across behaviors in which measures are taken at baseline and after the introduction of the independent variable at different times across multiple behaviors. Lastly, there is the multiple-baseline across situations in which measures are taken at baseline and after the introduction of the independent variable at different times across multiple situations.