Sensation: The process by which sensory receptors detect and respond to external stimuli (such as light, sound waves, or pressure) and transmit that information to the brain.
Selective Attention: The ability to focus on specific stimuli while ignoring others. It helps filter out irrelevant information in order to concentrate on relevant details.
Gestalt Principles: A set of principles describing how we organize sensory information into meaningful wholes or patterns, emphasizing the idea that 'the whole is greater than the sum of its parts.'