Sensation and perception

The basic idea

Sensation begins when receptors detect physical input, such as light or sound. Perception organizes and interprets that information. Attention, expectations and the surroundings help shape the interpretation. Together, these processes let us recognize objects, follow conversations and respond to events.

Follow the idea

Detect input
Organize information
Interpret in context

Odor molecules enter the nose, and the smell is interpreted in a familiar coffee context.

Use a familiar smell to connect detecting information with interpreting it.

Sensation: Sensory receptors detect information from the environment.
Perception: The information is organized and interpreted.
Context: Familiar places and expectations can shape the interpretation.

Open the picture and its text guide

Picture this

Original teaching example

A faint sound at a station could be a familiar name or a word from an announcement. Expecting to meet a friend may bring their name to mind. Hearing the full announcement could provide a clearer context.

Your turn

How could hearing the full announcement change your interpretation of the faint sound?

Show the explanation

The surrounding words would help identify what was said. They could support the familiar-name interpretation or suggest another word. Perception draws on this combination of incoming information, context and expectations.