Thresholds & Sensory

absolute threshold

the smallest quantity of physical energy that can be reliably detected by an observer.

Difference Threshold

the smallest difference in stimulation that can be reliably detected by an observer when two stimuli are compared (noticeable difference).

Signal Detection Theory

a psychological theory divides the detection of sensory signal into a sensory process and a decision process, factoring in the observer's expectations and experiences.

sensory adaptation

the reduction or disappearance of sensory response to a constant stimulus over time.

sensory deprivation

the absence of normal levels of sensory stimulation

selective attention

the process of focusing on selected aspects of the environment while blocking out others.

Inattentional blindness

failure to consciously perceive something you are looking at because you are not attending to it.