Gustav Fechner's psychophysical law in AP Psychology

Definition

Gustav Fechner's psychophysical law is a principle in psychology that states that our perception of a stimulus increases logarithmically as the intensity of the stimulus increases.

Related terms

Weber's Law: This law states that there is a constant ratio between the change in physical intensity of a stimulus and the noticeable difference we experience in our perception.

Absolute Threshold:

The absolute threshold refers to the minimum amount of stimulation needed for us to detect a particular sensory input.

Difference Threshold:

The difference threshold, also known as just noticeable difference (JND), is the smallest detectable change between two stimuli.