Welcome to Memory and Cognitive Processing!
Ever wondered why you can remember the lyrics to a song from five years ago but forget what you ate for breakfast yesterday? In this chapter, we explore Memory and cognitive processing within the context of learning and cognition. We aren’t just looking at memory as a "storage box"; we are looking at how our minds activeley process, organize, and retrieve information to help us learn about the world.
Don't worry if this seems like a lot of technical terms at first. Think of your mind like a high-tech library that is constantly sorting new books—some get put on the front desk (Short-Term), and some get filed away in the deep archives (Long-Term). Let’s dive in!
1. What is Cognitive Processing?
In Psychology, cognitive processing refers to the mental "work" our brains do. This includes things like perception, attention, language, and, most importantly for this chapter, memory. Within the cognitive approach, we assume that the mind works much like a computer: it takes in "input," processes it, and produces an "output" (like an answer to a question or a physical action).
The Three Stages of Memory
Before we look at complex models, remember that almost all memory involves three basic steps:
1. Encoding: Converting information from the outside world into a mental signal (like typing on a keyboard).
2. Storage: Keeping that information over time (like saving a file to a hard drive).
3. Retrieval: Getting that information back out when you need it (like opening a saved document).
Quick Tip: If you "forget" someone's name, it might not be because the memory is gone; it might be a retrieval failure—the file is there, but you can’t find the right folder!
2. Models of Memory
Psychologists use "models" to represent how they think memory works. You need to understand how these models explain the relationship between learning and cognition.
The Multi-Store Model (MSM)
This is the "grandfather" of memory models. It suggests that memory is made of separate "stores" that information moves through linearly.
Sensory Memory: Information from your five senses. It lasts only a fraction of a second. If you don't pay attention, it disappears forever!
Short-Term Memory (STM): This has a limited capacity (usually about \(7 \pm 2\) items) and a short duration (about 18–30 seconds).
Long-Term Memory (LTM): This is where information goes for permanent storage. It has a seemingly infinite capacity and can last a lifetime.
Key Concept - Causality: In the MSM, rehearsal (repeating information) is the causality link. Repeating information in your STM causes it to be transferred to your LTM.
The Working Memory Model (WMM)
While the MSM sees Short-Term Memory as a single "waiting room," the Working Memory Model sees it as an active "workbench" where we process different types of information at the same time.
The Central Executive: The "boss" of the system. It decides what to pay attention to and coordinates the other parts.
The Phonological Loop: Processes spoken and written material (your "inner ear").
The Visuospatial Sketchpad: Processes visual information and the layout of objects (your "inner eye").
Real-World Example: If you are trying to follow a map while listening to a podcast, you are using both the visuospatial sketchpad and the phonological loop at once. This is why it’s harder to listen to two people talking at the same time—you are overloading one specific "processor"!
Key Takeaway: Memory isn't just about storing facts; it's an active process of learning where we manipulate information to solve problems.
3. Schema Theory
How do we make sense of new information? We use Schemas. A schema is a mental framework or "blueprint" of knowledge about a person, object, or event based on past experience.
When you walk into a classroom, you don't have to "learn" what a desk or a whiteboard is every time. You already have a "classroom schema."
How Schemas Affect Memory
Schemas help us process information quickly, but they can also lead to Bias. If new information doesn't fit our schema, we might accidentally "change" the information in our minds to make it fit what we already know.
Did you know? This is why eyewitnesses to a crime sometimes "remember" seeing things that weren't actually there. Their brain fills in the gaps using their existing schemas!
Key Concept - Perspective: Our personal perspective (the schemas we've built over our lives) changes how we encode and retrieve new information.
4. Integrating the Three Approaches
In the IB curriculum, we look at memory through three lenses:
The Biological Approach: Focuses on the physical brain. For example, how the hippocampus helps turn short-term memories into long-term ones. If this part of the brain is damaged, change occurs in the person's ability to learn new things.
The Cognitive Approach: Focuses on the mental software (like the models we discussed above). It looks at how we process information logically or through schemas.
The Sociocultural Approach: Focuses on how our environment and culture affect memory. For example, people from different cultures might develop different strategies for learning depending on what their society values (e.g., oral storytelling vs. written lists).
5. Researching Memory: Methodology
In the "Learning and Cognition" context, the most common research method is the Experiment. This allows researchers to establish causality by manipulating one variable to see if it changes memory performance.
Measurement in Memory
How do we measure something we can't see? Psychologists use different types of measurement:
Recall: Asking someone to reproduce information from memory (e.g., an essay question).
Recognition: Asking someone to identify the correct information from a list (e.g., a multiple-choice question).
Accuracy: Measuring how many errors are made when reconstructing a memory.
Common Mistake: Don't assume "forgetting" means the memory is deleted. In research, we often find that information is still there, but the measurement tool wasn't sensitive enough to find it!
6. Summary and Key Takeaways
Memory is Active: It’s not just a recording; it’s a constant process of encoding, storing, and retrieving.
Models Help Us Understand: The MSM explains the structure (the stores), while the WMM explains the process (the workbench).
Schemas Organize Knowledge: They help us learn faster but can lead to bias when they distort our memories.
Context Matters: Our biological makeup, our mental processes, and our social environment all interact to shape how we remember.
Note: For more on how we use this information to make choices, see the chapter on "Thinking, decision-making and cognitive bias". For details on how to set up your own memory study, check "Class practical: experiment".