PN1001-Keil_Frank_C-Developmental_psychology_the_growth_of_mind_and_behavior-pp95-97

Imprinting: A strong, often irreversible learning process seen primarily in birds (e.g., chickens, ducks, geese).
- Main Function: Ensures offspring stay close to their mothers.
- Critical Period: Generally occurs within the first few days of hatching (Nakamori et al., 2010).
Imprinting Process:
- Young chicks approach various objects early on; repeated encounters during the critical period lead to lifelong following behavior (e.g., their mother).

Object Characteristics: Size, shape, contrast, movement, and other factors impact imprinting ease (Honey & Bateson, 1996).
- Chicks with innate biases are more likely to imprint on their real mothers after exposure.
Single Object Imprinting: Chicks typically imprint on one object rather than multiple, which aids survival by avoiding confusion.

Intermediate Medial Hyperstriatum Ventrale (IMHV): Region responsible for imprinting in chicks.
- Lesion Studies: Damage before imprinting prevents the learning process; damage afterward erases imprinting while still allowing other learned behaviors.
Two Independent Systems:
- General System: Not dependent on the IMHV; facilitates following behavior towards any chicken, not recognizing individuals.
- Imprinting System: Operates mainly during the critical period, allowing imprinting on several object types.
- Interactions between these systems often ensure correct imprinting on mothers (Bateson & Horn, 1994).

Human Infants: Similar mechanisms for face perception show how two systems work in tandem (first recognizing a general category, then individual faces).
Comparison of Learning Processes: Imprinting is highly structured within a set timeframe, contrasting with the variability seen in conditioning, which allows for a wider range of responses.