PSYA01H3 Lecture Notes - Lecture 11: Detection Theory, Absolute Threshold, Response Bias
Document Summary
Called himself a psychophysist: tried to study how the external world gets represented in the human mind, link between external world vs. perception, showed that difference threshold was a constant fraction of the intensity. Experimented with different thresholds of the real stimuli. Weber"s technique was all about finding difference thresholdsthe point where participants can notice a difference. But what we"d really like to know is how sensitive our sensory systems are: biggest challenge measure threshold, that is, what is the weakest stimulus they are sensitive to what is their absolute threshold. Provide stimuli below the conscious threshold: subliminal speaks directly to subconscious. Book that looks at ads that stimulate one subliminally: e. g. ice cube photoshopped to be provocative, burger king ad it"ll blow your mind away (very explicit) A stimulus is not presented and subject says that no stimulus was presented correct rejection. A stimulus is presented and the subject says that a stimulus is.
