PSYC 331 Sensation & Perception Exam 1 2024

PSYC 331 Sensation & Perception Exam 1 2024 detect - Correct Answer determining sensitivity of the perceptual system; signal present or absent in a quiet room or in noise (of varying types and levels) determine - Correct Answer determining sensitivity to stimulus differences identify/categorize - Correct Answer tends to involve complex stimuli that belong to different classes; it requires experience or expensive training When are you asking participants to do when measuring perception? - Correct Answer detect, discriminate, identify, and estimate estimate - Correct Answer quantify some dimension of the stimulus; it permits comparisons across domains and modalities What is the difference between sensation and perception? - Correct Answer sensation is the ability to detect a stimulus and our perception of something gives meaning to a stimulus so we can understand it absolute or detection threshold - Correct Answer the minimum amount of stimulation necessary for detection 50% of the time two point threshold - Correct Answer the minimum distance at which two stimuli are just perceptible as different difference threshold or just noticeable difference (JND) - Correct Answer the smallest change between two stimuli that can be detected 50% of the time method of adjustment - Correct Answer find the stimulus that is just barely detectable method of limits - Correct Answer the difference between two stimuli is varied incrementally until the participant responds differently. the average of crossover values gives you the threshold method of constant stimuli - Correct Answer when many different of stimuli, ranging from rarely to almost perceivable, are presented at one time. participants respond with yes/no, same/different, etc. What are the three psychophysical methods? - Correct Answer method of constant stimuli, method of adjustment, and method of limits How do you use an adaptive staircase in finding a threshold? - Correct Answer if the answer is wrong, it gets easier; if the answer is right again, it gets harder (reversal) Gustav Fechner - Correct Answer sometimes considered to be the true founder of experimental psychology dualism - Correct Answer the idea that the mind has an existence separate from the material world of the body materialism - Correct Answer the idea that the only thing that exists is matter, and that all things, including the mind and consciousness, are the results of interaction between bits of matter panpsychism - Correct Answer the idea that the mind exists as a property of all matter; that is, that all matter has consciousness psychophysics - Correct Answer defining quantitative relationships between physical and psychological events Weber fraction - Correct Answer the constant of proportionality in Weber's law Weber's law - Correct Answer the JND is a constant proportion of stimulus level Fechner's law - C