split brain research

• issues with generalisation - unusual sample of people (11) who has a history of epileptic seizures. Findings may have been influenced by the unique changes in the brain instead and some patients experienced more disconnection of the two hemispheres as part of their surgical procedures than others
• methodology - used high specialised and standardised procedures so experiment used a well controlled procedure. Typically participants stared at a fixation point where a image would flash for 1/10 of a second so there was no time for the eyes to be moved across both visual fields but by sperry's method of presenting visual ingor to one hemispheric field at a time was more useful at making sure only one hemisphere was receiving info at a time.