Single case designs are both criticized and lauded as a method for showing effectiveness. How have researchers improved on their limitations to make them more valid?

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Single case designs are limited by their lack of control groups and the inability to generalize results to larger populations. However, researchers have improved on these limitations by specifying the intervention and taking repeated measures or assessments to provide more rigorous and reliable data. This allows for clearer identification of the effects of the intervention on the individual case and allows for comparison across time periods.

Single Case Designs Are Both Criticized and Lauded as a Method