Learning & Cognition

Plasticity:
- Definition: Also known as neuroplasticity, this is the brain's ability to reorganize itself by forming new neural connections throughout life. It allows neurons (nerve cells) in the brain to compensate for injury and disease and to adjust their activities in response to new situations or changes in their environment.
- Impact on Memory:
- Increases memory capacity and functionality through processes like Long-Term Potentiation ( $LTP$ ).
- Example: London taxi drivers possess a significantly larger posterior hippocampus compared to the general population. This is attributed to their extensive spatial training ("The Knowledge"), demonstrating how environmental demands can physically alter brain structure to accommodate cognitive functions like spatial memory.

Localization of Function:
- Definition: The specific theory that different areas of the brain are responsible for specific psychological functions, such as language, memory, or perception.
- Specific Examples:
- Hippocampus: Primarily responsible for the consolidation of information from short-term memory to long-term memory. Damage here (as seen in patient $H.M.$ ) prevents the formation of new memories.
- Amygdala: Essential for emotional processing, particularly fear responses.
- Individual Variability:
- Brain mapping shows that while general regions are specialized, the exact boundaries can vary between individuals, and some functions can be redistributed following brain trauma (the principle of Equipotentiality).

Cognitive Models:
- Purpose: These serve as theoretical frameworks or flowcharts that represent the mental processes involved in tasks. They simplify complex biological and psychological data into manageable representations to predict behavior.

Multi-Store Model ( $MSM$ ):
- Structure: Proposed by Atkinson and Shiffrin ( $1968$ ).
- Sensory Store: Holds incoming sensory information for a fraction of a second.
- Short-Term Store ( $STM$ ): Holds approximately $7 \pm 2$ items for about $18-30$ seconds.
- Long-Term Store ( $LTM$ ): A vast storehouse for information that can be kept for a lifetime.
- Mechanism: Information is moved through attention and rehearsal.
Working Memory Model ( $WMM$ ):
- Proposed by Baddeley and Hitch ( $1974$ ).
- Components:
- Central Executive: The "boss" that delegates data to the slave systems and deals with cognitive tasks like mental arithmetic.
- Phonological Loop: Handles auditory information (e.g., repeating a phone number).
- Visuospatial Sketchpad: Handles visual and spatial information (e.g., visualizing a route).
- Episodic Buffer: A temporary store that integrates information from the other stores and $LTM$ .

Environmental Factors:
- Context-Dependent Memory: The theory that we remember information better if we are in the same environment where we first learned it.
- Example: In a study by Godden and Baddeley ( $1975$ ), divers who learned a list of words underwater recalled them better underwater than on land, and vice versa.

The Google Effect (Digital Amnesia):
- Definition: The tendency to forget information that can be easily found online using search engines.
- Example: Research shows that when people know a computer will save a piece of information, they are less likely to remember the information itself but more likely to remember where the information is stored (transactive memory).

Cognitive Load Theory:
- Definition: Developed by John Sweller, this posits that since working memory is limited, if the cognitive load (the amount of information processing required) exceeds the capacity, learning will be hindered.
- Example: Trying to solve a complex math problem while listening to a loud, distracting lecture increases "extraneous load," making it difficult for the brain to process the actual task.

Cultural Factors:
- Example: Indigenous Australians, who rely on oral traditions, often perform significantly better on visual-spatial memory tests compared to white Australian children, as their culture emphasizes the importance of land-based navigation and storytelling.

Role of Bilingualism:
- Cognitive Flexibility: Bilinguals often show enhanced "executive function," which includes the ability to switch between tasks and ignore irrelevant information.
- Example: Bilingual individuals often outperform monolinguals on the Stroop Task (naming the color of a word when the word itself is a different color) because they are used to inhibiting one language to use the other.

Growth Mindset:
- Example: Students who are praised for their effort ("You worked really hard on this math problem") rather than their intelligence ("You are so smart at math") are more likely to develop a growth mindset, leading to higher academic resilience.

Motivation's Impact:
- Self-Efficacy: The belief in one's own ability to complete a task. High self-efficacy acts as a motivator that improves cognitive focus and persistence.
- Example: A student who believes they can master a difficult coding language is more likely to use deep processing strategies and persist through debugging sessions than a student with low self-efficacy.