Sensations are raw data received by our sensory receptors through various senses such as vision, hearing, taste, smell, touch, temperature, pain etc. They are basic elements that provide information about stimuli in our environment.
The process where sensory receptors convert physical energy into neural signals.
The lowest level of stimulus intensity needed for us to detect it 50% of the time.
Weber's Law: A principle stating that there is a constant proportion between changes in stimulus intensity and resulting changes in sensation.