Rubin and Knox argue that single-case designs are currently overemphas
ized in social work education and are of more limited value in practic
e than is commonly stated. These conclusions are based on confusions b
etween research and practice, misunderstandings and misstatements of t
he relative utility of single-case and group designs for both, and neg
lect of the basic literature regarding single-cafe designs and visual
analysis. In addition, the Rubin and Knox arguments appear to be based
on overinterpretation of the results of a study of an ineffective int
ervention.