Introduction to Cognitive and Biological Approaches
Welcome to one of the most exciting parts of your Psychology course! In this chapter, we are going to look at two very different ways of explaining why humans behave the way they do. Think of "Approaches" like different pairs of glasses: when you put on the Cognitive glasses, you see the mind as a powerful computer processing information. When you switch to the Biological glasses, you see the physical brain, genes, and chemicals. Both approaches are essential for understanding the "Context" of psychology in Paper 2.
Don’t worry if some of the scientific terms feel a bit heavy at first—we will break them down into simple, everyday analogies to help them stick!
1. The Cognitive Approach
The Cognitive Approach started to gain popularity in the 1950s. Its main argument is that we cannot understand behavior without looking at internal mental processes—the private workings of the mind like memory, perception, and thinking.
Key Assumption: The Mind as a Processor
Cognitive psychologists believe the mind works a bit like a computer. We take information in (input), change it or store it (process), and then act upon it (output).
The Challenge: You can’t actually "see" a thought. Because mental processes are private, psychologists have to make inferences.
Example: If I show you a picture and you smile, I infer (make a logical guess) that your internal processing of that image was positive, even though I didn't see the "thought" itself.
Theoretical and Computer Models
To make these invisible processes easier to understand, psychologists use models:
1. Theoretical Models: These are often flowcharts that show how information moves through the mind. You might remember the Multi-Store Model of Memory—that is a classic theoretical model!
2. Computer Models: This involves comparing the mind to a computer. We have "coding" (how we store info) and "hard drives" (long-term memory). This has even led to the development of Artificial Intelligence (AI).
The Role of Schema
A schema is a "mental package" of ideas and information developed through experience. They act as a mental shortcut.
Analogy: Think of a schema like a folder on your computer labeled "Restaurant." Inside that folder, you have expectations: tables, menus, waiters, and food. When you walk into a new restaurant, you don't have to learn what to do from scratch because your "Restaurant Schema" tells you what to expect.
The Downside: While schemas help us process information quickly, they can also lead to perceptual errors or stereotypes because we might ignore things that don't "fit" our folder.
The Emergence of Cognitive Neuroscience
This is the "modern" side of the approach. Cognitive Neuroscience is the scientific study of the influence of brain structures on mental processes. Thanks to advanced technology like fMRI and PET scans, scientists can now actually see which parts of the physical brain "light up" when we are feeling sad, remembering a childhood holiday, or processing language.
Quick Review: The Cognitive approach is all about internal mental processes, using models to explain how we work, and understanding how schemas help us navigate the world.
2. The Biological Approach
If the Cognitive approach is about the "software" of the mind, the Biological Approach is definitely about the "hardware." This approach suggests that everything psychological is at first biological.
The Genetic Basis of Behaviour
Psychologists in this field want to know how much of our behavior is inherited from our parents. To understand this, you need to know the difference between these two terms:
1. Genotype: This is your actual genetic makeup—the DNA you were born with.
2. Phenotype: This is the way your genes are actually expressed through physical, behavioral, and psychological characteristics.
Important Point: The phenotype is influenced by environmental factors. For example, you might have the "genotype" to be very tall, but if you don't get enough nutrition while growing (environment), your "phenotype" might be average height.
Evolution and Behaviour
The Biological approach uses Charles Darwin’s theory of evolution to explain behavior. The idea is that any behavior that helps a human survive and reproduce will be passed on to the next generation. This is called natural selection.
Example: A certain amount of "fear" or "aggression" might have been an evolutionary advantage for our ancestors to stay alive, which is why those traits still exist in our gene pool today.
Biological Structures and Neurochemistry
The approach also looks at the physical "stuff" inside us:
- Biological Structures: This refers to the brain and the nervous system. Different parts of the brain (like the lobes or the amygdala) are responsible for different behaviors.
- Neurochemistry: This is all about chemicals in the brain called neurotransmitters. For example, an imbalance of the neurotransmitter serotonin is often linked to depression, while high levels of dopamine are linked to other conditions. It's like a chemical soup—if the recipe is slightly off, behavior changes.
Key Takeaway: The Biological approach argues that our behavior is a result of our genes, our brain structure, and our neurochemistry.
3. Comparing the Two Approaches
While you will study the "Comparison of Approaches" in more detail in another chapter, here is a quick "cheat sheet" to help you distinguish these two:
Nature vs. Nurture:
- The Biological approach is heavily on the "Nature" side (it's all in our biology).
- The Cognitive approach is a bit of both; we are born with the "hardware" to process info, but our "schemas" (the software) are built through "Nurture" (experience).
Determinism (Do we have a choice?):
- The Biological approach is "Strongly Deterministic"—it suggests we are controlled by our genes and chemistry.
- The Cognitive approach suggests "Soft Determinism"—we are influenced by our mental processing, but we still have some conscious control over our thoughts.
Scientific Methods:
- Both approaches are very scientific! The Biological approach uses brain scans and drug trials, while the Cognitive approach uses laboratory experiments to test memory and perception.
Common Mistakes to Avoid
1. Confusing Genotype and Phenotype: Remember, Genotype is the "blueprint" (unchanging), Phenotype is the "final building" (can be changed by the environment).
2. Thinking Schemas are always good: While they help us think fast, always mention in your AO3 (evaluation) that they can lead to bias and distorted thinking.
3. Ignoring the overlap: Don't forget that Cognitive Neuroscience is the bridge where these two approaches meet!
Don't worry if this seems like a lot to take in! Just remember: Cognitive = Thoughts/Processing; Biological = Brain/Genes. If you can keep those two distinct, you are halfway there!