Know the principles of perceptual grouping. Sensuality is the quality of being devoted to the gratification of the senses. Sensation is the process by which a stimulated sensory neuron or receptor gives rise to neural umpulses that result in an elementary experience of feeling, or awareness, of conditions inside or outside the body. Perception is the elaboration, interpretation, and assignment of meaning to sensory experience. Transduction Transduction is the process that converts one form of physical energy, such as light, to another form, such as neural impulses.
Afferent systems are the sensory systems that process information coming into the brain.
Efferent systems are the motor systems that process information going out from the brain to the muscles and glands. Psychophysics is the study of correlations between physical stimuli and the behavior or mental experiences they evoke. Gustav Fechner was a German was a German physicist who coined the term psychophysics. Absolute threshold is the minimum amount of physical energy needed to produce a sensory experience. Difference threshold is the smallest physical difference between two stimuli that can still be recognized as a difference.