Individual Review Homework #1_for students

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Psychology

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Feb 20, 2024

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Psyc230 Individual Review Homework #1 (Units 1 and 2): total points: 10 pts Please use your notes and slides for this activity. You should first provide your own answers to the homework (using your own words). After the homework submission deadline, you will be able to access the solution to the homework. Please use it to verify your answers. They are provided to help you learn the material and study for the exam. Note, the answer provided does not necessarily contain all the relevant information. There are a total of 9 homework and they will count for 15% of the final grade . Relationship between physical intensity and perceptual intensity. 1. Figure 1. 1.1 (1pt) Write all the relevant terminology and definitions associated with the Figure above. There is physical intensity and perceptual intensity in the figure, physical intensity and perceptual intensity seems to correlate positively. Physical intensity means a measurable stimulus perceptual intensity means how people sense or perceive that stimulus. The relevant terminology is weber’s law 1.2 (1pt) Using your own words, please find an example to describe the relationship between the physical intensity of the stimulus and the perceptual intensity. In particular, try to explain what happens with the physical intensity on the X axis when you move from 0 to 1 to 2 in the Y axis. The physical intensity and perceptual intensity is positively correlated. Where physical intensity increases, perceptual intensity increases proportionally. In this case, as Y axis moves from 0 to 1 to 2, x axis also increases the same amount proportionally. Example: I can figure out the way I sleep in my blanket because my vision can sense apparent length, so that I can see the length difference of each side of the blanket, knowing which side is longer and which side is shorter so that I don’t have to sleep with my feet outside the blanket. 1

Psyc230 2. Figure 2. 2.1. (1pt) Write all the relevant terminology and definitions associated with the Figure above. There is physical intensity and perceptual intensity in the figure, there is a response compression where physical intensity increase, perceptual intensity doesn’t increase, and it is not correlated. Response compression means that in a figure like this, as x axis increase, y axis doesn’t increase as much and seems to flatten at the end, here it means the increase in perceptual intensity is not proportional to the increase in physical intensity. Physical intensity means a measurable stimulus. Perceptual intensity means how people sense or perceive that stimulus. The relevant terminology is Facher’s law. 2.2 ( 1pt) Using your own words, please find an example to describe the relationship between the physical intensity of the stimulus and the perceptual intensity. In particular, try to explain what happens with the physical intensity on the X axis when you move from 0 to 1 to 2 in the Y axis. As the Y axis moves to 0 to 1 to 2, the x axis doesn’t seem to move proportionally, and even if the physical intensity doubles, the perceptual intensity does not double. it might be increasing slowly and flatten at the end. Example: When I am holding a half full cup of water, I can feel the difference of someone adding more water, but if someone add the same amount of water inside a bucket of water I am holding, I might not feel much of a difference. 2

Psyc230 3. Figure 3. 3.1 (1pt) Write all the relevant terminology and definitions associated with the Figure above. Physical intensity means a measurable stimulus perceptual intensity means how people sense or perceive that stimulus. Response expansion means that as the physical intensity increases, the perceptual intensity increases in a greater rate. The relevant terminology is Steven’s power law. 3.2 (1pt) Using your own words, please find an example to describe the relationship between the physical intensity of the stimulus and the perceptual intensity. In particular, try to explain what happens with the physical intensity on the X axis when you move from 0 to 1 to 2 in the Y axis. Example: I might not feel much pain if a light person runs towards me and crashes on me, but I might feel extreme pain if someone weighty hits one me. The y axis increases in a greater rate than x axis, if the y axis increases from 0 to 1 to 2, the x axis might not change much. Review of the different psychophysical methods a. Methods of Limits. Check what applies. (1pt) ❏ Random presentation of stimuli ❏ Orderly presentation of stimuli (ascending blocks and descending blocks) ❏ Participants directly control the stimulus level ❏ Experimenter/Computer controls the stimulus level, not the participant ❏ Participants press a button when they detect the stimulus ❏ Participants press a button when they stop detecting the stimulus 3

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Psyc230 ❏ Participants give a value to estimate the magnitude of their experience when confronted with the stimulus b. Methods of Constant stimuli. Check what applies . (1pt) ❏ Random presentation of stimuli ❏ Orderly presentation of stimuli (ascending blocks and descending blocks) ❏ Participants directly control the stimulus level ❏ Experimenter/Computer controls the stimulus level, not the participant ❏ Participants press a button when they detect the stimulus ❏ Participants press a button when they stop detecting the stimulus ❏ Participants give a value to estimate the magnitude of their experience when confronted with the stimulus c. Method of Adjustment. Check what applies . (1pt) ❏ Random presentation of stimuli ❏ Orderly presentation of stimuli (ascending blocks and descending blocks) ❏ Participants directly control the stimulus level ❏ Experimenter/Computer controls the stimulus level, not the participant ❏ Participants press a button when they detect the stimulus ❏ Participants press a button when they stop detecting the stimulus ❏ Participants give a value to estimate the magnitude of their experience when confronted with the stimulus d. Magnitude Estimation method. Check what applies . (1pt) ❏ Random presentation of stimuli ❏ Orderly presentation of stimuli (ascending blocks and descending blocks) ❏ Participants directly control the stimulus level ❏ Experimenter/Computer controls the stimulus level, not the participant ❏ Participants press a button when they detect the stimulus ❏ Participants press a button when they stop detecting the stimulus ❏ Participants give a value to estimate the magnitude of their experience when confronted with the stimulus 4

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