Communication is how we share information, ideas, and feelings with others, and it happens in many different ways, from talking to plants sending chemical signals.

Key idea: Models of communication are simplified diagrams that show how messages travel from a sender to a receiver, often including feedback.

To help us understand communication better, people often use models of communication. These are like simplified maps that show the main parts of communication and how they work together. Imagine you are drawing a simple diagram to explain how a letter gets from you to a friend.

Most models include a sender (the one who starts the message), a message (the information being sent), a channel (how the message travels, like a phone call or an email), and a receiver (the one who gets the message). The sender 'encodes' the message (puts it into a form that can be sent), and the receiver 'decodes' it (understands what it means).

Early models, like the one from Shannon and Weaver, were very simple, like a one way street. They focused on how a message travels from one point to another. Think of sending a text message: you type it, it goes through the internet, and your friend reads it. This is a 'linear' model because the information flows in one direction.

Later models added the idea of feedback. This is like a two way street. For example, in a conversation, when you speak, your friend might nod or ask a question. This feedback shows they are listening and understanding. Even later models, called 'transaction models', recognized that people can send and receive messages at the same time, like when you are talking and also using body language.

A common mistake is to think communication is always a perfect, one way street. In reality, it is often a two way street with feedback, and sometimes messages get lost or misunderstood along the way.

Key idea: Human communication can be verbal (using language) or non verbal (using body language, expressions), and can be with others (interpersonal) or with oneself (intrapersonal).

When we talk about human communication, we often divide it into different types. One big difference is between verbal communication and non verbal communication.

Verbal communication uses language. This includes spoken words, written words, and even sign language. It is about using a system of symbols (words) and rules (grammar) to share ideas. For example, when you tell a story or write an email, you are using verbal communication.

Non verbal communication happens without words. This includes things like your body language, facial expressions, eye contact, and even how close you stand to someone. For instance, a smile can show happiness, or crossing your arms might show you are upset. Non verbal cues often happen at the same time as verbal communication, adding more meaning to what we say.

Another way to categorize human communication is whether it is with others or with yourself. Interpersonal communication is when you communicate with other people, like talking to a friend or giving a presentation. Intrapersonal communication is when you communicate with yourself, like thinking through a problem in your head, making a shopping list, or writing in a diary.

“Non verbal communication happens without words. This includes things like your body language, facial expressions, eye contact, and even how close you stand to someone.”

Key idea: Communication extends beyond humans, with animals using diverse signals, plants relying on chemical exchanges, and computers transmitting data through networks.

It is not just humans who communicate! Animals, plants, and even computers have their own ways of sharing information.

Animal communication involves animals exchanging information. They use many methods, such as sounds (like a dog barking), smells (like ants leaving a scent trail), body movements (like a bee's dance to show where flowers are), and even colors (like a bird's bright feathers to attract a mate). These signals help them find food, warn of danger, or find partners.

Plant communication is a bit harder to see, but it is very real. Plants often use chemicals to communicate. For example, if one maple tree is attacked by insects, it might release special chemicals into the air. Nearby maple trees can 'smell' these chemicals and start building up their own defenses against the insects. They can also communicate through underground networks of fungi, sharing warnings and even nutrients.

Computer communication is about how computers and other devices exchange data. This happens through networks, like the internet. When you send an email, your computer converts the message into electrical signals that travel through cables or wirelessly to another computer. These devices follow special rules, called 'protocols', to make sure the information is sent and received correctly.

Key idea: Communicative competence is the skill of communicating effectively and appropriately to achieve your goals in different situations.

Communicative competence is simply the ability to communicate well. It means knowing what to say, when to say it, and how to say it in a way that is both effective and appropriate.

Being 'effective' means you achieve your goal. For example, if you ask for directions and get to your destination, your communication was effective. Being 'appropriate' means your communication fits the social situation. You would talk differently to your boss than to your best friend.

Someone with good communicative competence can adjust their message and style based on who they are talking to and the situation they are in. They also understand messages clearly and can respond thoughtfully. This skill is vital for success in many parts of life.

“Communicative competence is simply the ability to communicate well.”

Key idea: Barriers to communication, such as noise or cultural differences, can prevent messages from being understood clearly.

Sometimes, communication does not go as planned. These are called barriers to communication. They can stop a message from being understood correctly.

One common barrier is 'noise'. This is anything that interferes with the message. For example, static on a phone call or a loud environment can be noise. Even confusing language or a message that is too long can be a type of noise.

Other barriers include not paying attention, making assumptions, or cultural differences that lead to misunderstandings. Imagine trying to explain something complicated to someone who speaks a different language; the language difference is a barrier. Overcoming these barriers is key to successful communication.