Sample

• The participants were a group of 11 American patients who experienced severe epileptic seizures that could not be controlled by medication.
• The split brain operation is a possible remedy for these 11 American patients. Involved cutting through most or all of the cerebral commissures that connect the left and right hemispheres of the brain.
• This was an opportunity sample of patients referred to the White Memorial Centre in Los Angeles.
• One patient was female, in her thirties, she was a mother and a housewife. She had her split brain operation four years prior to this study. Another was male and had his operation 5.5 years before the study.

  • For most patients the operation reduced the frequency and severity of their seizures.