How is the absolute threshold defined?

The absolute threshold is defined as the lowest intensity of a stimulus that can be sensed and perceived by an individual. This threshold represents the point at which a stimulus becomes detectable, meaning it is the minimal level of stimulus intensity that a person can consciously experience.

For example, in the context of hearing, the absolute threshold would refer to the quietest sound a person can hear. This concept is critical in understanding sensory perception and its limits, highlighting how individuals vary in their ability to detect stimuli.

The correct definition emphasizes that the absolute threshold is not merely about sensing a stimulus but also includes the aspect of perception—an important distinction in sensory psychology.