issues with generalisation

• P- many researchers have argued caution in the studies' findings widespread acceptance, as split-brain patients constitute such a small sample of people
• E- there were only 11 who took part in all variations of the basic procedure, all of whom had a history of epileptic seizures. It has been argued that this may have caused unique changes in the brain that may have influenced the findings
• E- it is also the case that some participants had experienced more disconnection of the two hemispheres as part of their surgical procedure than others. Finally, the contro, group Sperry used made up of 11 people with no history of epilepsy may have been inappropriate