PSYC 1001 Lecture Notes - Lecture 6: Detection Theory, Subliminal Stimuli, Absolute Threshold
Document Summary
Psych chapter 6: sensation and perception class note. Two types of information processing: bottom-up processing: analysis that begins with the sense receptors and works up to the brains integration of sensory information, top-down processing: information processing guided by higher-level mental processes. In sensory research, processing is traditionally divided into 2 processes: sensation: detecting energy form the environment and encoding it as neural signals. Raw information: perception: selecting organizing, and interpreting sensation. Sensation: psychophysics: the study of the relationships between the physical characteristics of stimuli and psychological or sensory experience of them, absolute threshold: the minimum stimulation needed to detect a stimulus 50% of the time. Signal detection theory: attempts to predict how and when the presence of a faint stimulus (the signal) is detected against a background noise: advantage over classical psychophysics: Experience, expectations, motivation, fatigue, and response bias: basics of signal detection theory: Give the subject the real signal during half of the trials.
