split-brain research into hemispheric lateralisation AO3

• Sperry's split brain into hemispheric lateralisation

  • Involved good methodology
  • Presented visual information to one hemispheric field at a time
  • Flashed image for one-tenth of a second to prevent eye movement across visual field
  • Allowed Sperry to vary aspects of the basic procedure and ensure only one hemisphere received information at a time
  • Specialised, standardised and well-controlled procedure allowed for extraneous variables to be controlled
• Good methodology


  Increases the internal validity of Sperry's split brain into hemispheric lateralisation
• Issues with generalisability


  Reduces the internal validity and population validity of Sperry's split brain into hemispheric lateralisation
• Sperry's split brain into hemispheric lateralisation

  • Demonstrated lateralised brain functions
  • Left hemisphere more geared towards analytical and verbal tasks
  • Right hemisphere more adept at spatial tasks and music
• Demonstration of lateralised brain functions


  Increases the credibility of Sperry's split brain into hemispheric lateralisation
• Overstating differences in function

  Limits the credibility of Sperry's split brain into hemispheric lateralisation