Memory Encoding

Memory Encoding: Definition: What is memory encoding and why is it necessary?

Answer: Memory encoding is the process of forming a mental representation of a present experience. It is necessary because in order to access information during the Retrieval Phase, it must first be successfully transformed and stored during the Study Phase.

The Study Phase: Scenario: You meet someone at a party and try to commit their name to memory. What phase of the experimental paradigm is this, and what is the primary goal?

Answer: This is the Study Phase. The goal is to engage in Encoding to create a durable representation of the information so that you can recall it later during the test or "retrieval" phase.

Laboratory Controls: What are the four specific variables that scientists can control in a laboratory setting to measure memory encoding accurately?

Answer: Scientists can control: 1. Delay (how long between study and test), 2. Stimuli (exactly what is being studied), 3. Length (how long you study it), and 4. Testing Format (what information you are given during the retrieval phase).

Encoding Stimuli: While researchers can use movies, complex scenes, or faces, why do they most commonly use individually presented words or word pairs?

Answer: Researchers prefer simple stimuli like words because they allow for maximum control over variables like frequency, noun type, and associations. Using word pairs also allows them to test how subjects draw associations and imagine items together.

The "Owl" Paradigm: Fill-in-the-blank: A standard memory encoding experiment consists of three parts: the _____, a _____, and finally the _____.

Answer: Study Phase; Delay/Distractor Phase; Test Phase. The study phase presents stimuli, the delay prevents simple rehearsal, and the test phase measures what was actually encoded into long-term storage.

The Three Encoding Processes: What are the three primary established processes that support and improve memory encoding?

Answer: The three processes are: 1. Mental Imagery, 2. Depth of Processing, and 3. Context-Dependent Memory. Using these strategies makes it more likely that a memory will be "durable" and easy to retrieve.

Mental Imagery: Definition & Example: What is mental imagery and how does it function as an encoding tool?

Answer: Mental imagery is the process of creating a visual representation of a stimulus in your mind. For example, when you hear the word "owl," you likely visualize a small, white, feathered bird, which creates a second "visual" code for the memory in addition to the verbal one.

Concrete vs. Abstract: Define "Concrete" and "Abstract" stimuli in the context of memory.

Answer: Concrete stimuli represent physical things in the world (e.g., "Chair," "Owl") that are easy to visualize; Abstract stimuli represent non-physical constructs (e.g., "Fact," "Truth") that are difficult or idiosyncratic to visualize.

Dual-Coding Hypothesis: How does the encoding process differ between concrete and abstract words?

Answer: Concrete words are encoded using both a verbal and visual code (dual-coding), while Abstract words are typically encoded using only a verbal code. Because there are two "paths" to a concrete memory, it is much easier to remember.

Frequency Effect: In the mental imagery experiment (Gorman, 1961), which type of words were surprisingly remembered better than common ones?

Answer: Low-frequency words (rare words) were remembered better than high-frequency words. This is because rare words are more distinct and stand out more during the study phase than words we hear every day.

Depth of Processing: Definition: What is "Depth of Processing" and what does it predict about memory?

Answer: It is the idea that stimuli can be processed at different levels (Shallow vs. Deep). The theory predicts that Deeply processed stimuli—those where you must think about meaning—will be remembered significantly better than stimuli you only look at superficially.

Shallow vs. Deep Questions: Scenario: Question A asks "Is BREAD in all caps?" and Question B asks "Is BREAD a type of food?" Which leads to better encoding and why?

Answer: Question B leads to better encoding because it is a Deep Question. It requires you to access your knowledge of the word's meaning, whereas Question A is a Shallow Question that only requires you to look at the visual shape of the letters.

Recognition Tests: How is a recognition test structured, and why must it include "new" words?

Answer: In a recognition test, subjects are shown a 50/50 mix of "old" (studied) and "new" (unseen) words. The new words are necessary to test the subject's ability to discriminate between real memories and guesses, preventing them from just saying "yes" to everything.

Behavioral Limits: Why is it difficult for researchers to study memory using only behavioral methods (like test scores)?

Answer: If a subject fails to recall a word, behavior alone cannot tell you if they failed to encode it (it never got in) or failed to retrieve it (it's there, but they can't find the "key"). To solve this, researchers must look at brain activity during the encoding phase.

Episodic Memory: Definition: What is episodic memory and why is it the focus of encoding studies?

Answer: Episodic memory is memory for experiences situated in a specific spatiotemporal context (a specific time and place). Because it "binds" an event to a context, it is the perfect system for studying how the brain links different types of information together.

The Hippocampus (The Binder): What is the primary function of the hippocampus in the formation of new memories?

Answer: The hippocampus acts as a "binder." It takes the item (the what) and the context (the where/when) and glues them together into a single representation. Without a functional hippocampus (as seen in H.M.), you can experience the world but cannot "bind" it into a lasting memory.

Hippocampal Sensitivity: According to the Davachi (2003) MRI study, when does the hippocampus show the most activity?

Answer: The hippocampus shows Associative/Source Sensitivity, meaning its activity is highest when an item is remembered along with its context. It doesn't just respond to "old" items; it specifically responds to the act of binding an item to its original task or environment.

Final Conclusion: What is the "Final Conclusion" regarding the brain's role in memory encoding?

Answer: The Hippocampus supports memory encoding by binding items and their contexts together. This "bound" representation creates richer retrieval cues, making it much easier to access that information during a later test phase.