PSY 1001 Lecture Notes - Lecture 7: Detection Theory, Color Vision, Absolute Threshold

• School: University of Iowa
• Department: Psychology
• Course: PSY 1001
• Professor: Poremba Amy

Document Summary

2/29/16: sensation and perception, sensation: detection of physical energy by our sense organs which sends info to the brain. External stimulus is converted by sense receptors into neural. Activation is highest hen stimulus is first detected, then sensory activity via transduction adaptation occurs: perception: brain"s interpretation of raw sensory data, psychophysics: study of how we perceive sensory stimuli based on physical characteristics. Absolute threshold is lowest level of a stimulus we can detect 50% of the time. 50 odorant molecules charge we can detect for the detection of a difference. The just noticeable difference is the smallest amount of stimulus. Weber"s law: stronger the stimulus, greater the change necessary. Signal detection theory: not only is a physical stimulus coming in, but we"re putting our thoughts into it. Human visible spectrum is narrow band of light we respond to. Other animals have different ranges of light they can see. We perceive brightness (intensity) and hue (color: color perception.