PS101 Chapter 4: Chapter 4.docx
Document Summary
There is nothing absolute about sensation and perception. Blow a whistle ten times and you hear if five times then that frequency is your absolute threshold : just noticeable difference (jnd): smallest detectable difference in the amount of stimulation. What will you notice if a stimulus is altered (the physical sensation) Signal detection theory: signal detection involves decision processes (interpretation, response bias) and sensory processes: perception of signals. Some one who says that is was there and it was = hit. Some one who says it was there and it wasn t = false alarm. Some one who says that is was not there and it was = miss. Some one who says that is was not there and it was not = correct rejection. Midterm: fifty multiple choice questions chapters 1, 2, + appendix, 3. Half in this room, half in the auditorium.
