Gibson and walk background

• fantz (1963)


  babies have an innate capacity for facial recognition, they are pre programmed to prefer faces of caregivers
• habituation


  infants will get used to or bored of familiar stimuli, but will show interest to new stimuli, leading to the investigation of whether infants can discriminate between 2 stimuli, e.g red object shown repeatedly until infant's heart rate/visual gaze drops, then green object is introduced, any difference in response indicates that they can discriminate red from green
• selective rearing


  raising an animal from birth under controlled conditions to observe outcome, e.g blakemore and cooper, measures perceptual development in animals, lacks population validity