PSYC 212 Lecture Notes - Lecture 2: False Alarm, Facial Recognition System, Psychophysics

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Method of adjustment observer adjusts the stimulus intensity so that he can barely detect the stimulus: not precise depends on internal factors. Method of limits stimuli of different intensities presented in ascending and descending order: yes/no response where the answer changes. Discrimination, identification, classification: was derived to overcome the limitations of the traditional threshold theory. Generally used for studying sensory systems: measures your sensitivity and your bias levels (for yes or no, general approach to measuring performance. Face recognition, skills of doctor to detect diseases from x-rays, find intensity of sound that can be heard 80% of the time, memory/cognitive performance. Signal stimuli (anything: light, sound, smell, taste, touch, new faces within a group of old faces (memory, worlds that are grammatically correct (cognition) Multiple trials with the same stimulus to measure performance: results two kinds of stimuli and two kinds of answers. The subject can either perceive the stimulus or not.

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