The study by Richard Held and Alan Hein investigates the development of visually guided behavior in neonatal kittens, focusing on the role of movement-produced stimulation. They compared two groups of kittens: one group was actively moved (A) while the other was passively moved (P) during visual stimulation. The results showed that A kittens developed normal visually guided behaviors, such as paw placement, discrimination on a visual cliff, and the blink response, whereas P kittens failed to develop these behaviors. This suggests that self-produced movement with concurrent visual feedback is essential for the development of visually guided behavior. The study also highlights the complementarity between adult rearrangement techniques and neonatal deprivation methods in understanding sensory-motor plasticity. The findings support the idea that variation in visual stimulation accompanying movement is crucial for the development of certain coordinations, but this variation must be concurrent with and systematically dependent on self-produced movements.The study by Richard Held and Alan Hein investigates the development of visually guided behavior in neonatal kittens, focusing on the role of movement-produced stimulation. They compared two groups of kittens: one group was actively moved (A) while the other was passively moved (P) during visual stimulation. The results showed that A kittens developed normal visually guided behaviors, such as paw placement, discrimination on a visual cliff, and the blink response, whereas P kittens failed to develop these behaviors. This suggests that self-produced movement with concurrent visual feedback is essential for the development of visually guided behavior. The study also highlights the complementarity between adult rearrangement techniques and neonatal deprivation methods in understanding sensory-motor plasticity. The findings support the idea that variation in visual stimulation accompanying movement is crucial for the development of certain coordinations, but this variation must be concurrent with and systematically dependent on self-produced movements.