Discussion board with an activity

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ohfuohfu

Humanities

University of North Texas

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Here is your Activity 2! I have uploaded the assignment instructions form to the Chapter 2 course module in Canvas. After you have completed ISLE activity 2.9 (The Signal Detection Experiment; http://edge.sagepub.com/schwart Links to an external site.) and recorded your responses using the table on the instruction sheet (you do not need to turn the instruction sheet in), please respond to this thread by answering the following three questions. Your answers do not have to be very long, about 2-3 sentences per answer is expected.

Question 1: How does changing the number of observed stimuli and the speed of the stimuli affect your signal sensitivity (d-prime)? How about your criterion? Remember, the higher the d-prime the higher your sensitivity, and vice versa. The higher your criterion is, the stricter in responding you are (i.e., conservative), and the lower your criterion is, the more liberal (i.e., lax) you are in responding.

Question 2: Having completed a basic visual psychophysics experiment, what other factors do you think may have contributed to/affected your performance?

Question 3: Can you think of any other decision-making scenarios in the real world that we might use to demonstrate a signal detection model? Come up with an example that is not in your textbook and that we have not discussed in class- be creative!!!

Your responses are due in this thread by Monday 1/29 by 11:59 PM in CANVAS

You do not need to turn in the form with the response table.

P.S. The experiment should auto-generate your d-prime, C, Hits, Misses, False Alarms, and Correct Rejections after each set of trials is complete. If you do not see this information, check to see that your pop-up blocker is not preventing you from seeing it. You may also use the following online calculator to compute your signal detection estimates:

https://camel.psyc.vt.edu/models/dprime/Links to an external site.Links to an external site.

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Sensation and Perception Assignment #2 (Responses Due on the Canvas Assignment 2 Discussion Board by Monday 1/29 by 11:59 PM on CANVAS). You do not need to turn this instruction sheet in, it is simply for you to record your responses on. Here is the ISLE Activities Website for your Book: http://edge.sagepub.com/schwartz • • To do: Go to ISLE activities on Schwartz Website (see link above) Note: If the program does not o Go to chapter 2 (Research Methodology) o Under chapter 2 click “ISLE activities and compute d-prime (d’) and criterion quizzes” o Scroll down to “ISLE 2.9. Signal Detection (C) for you due to a browser issue, Experiment” here is another calculator online ▪ You will undergo one set of trials at each setting (see below) that you can use, just input your ▪ Use the following stimulus settings: hit rates and false alarm rates • Background Dots: 10, 25, 50, 75 https://camel.psyc.vt.edu/models/ • Dot Speed: 1, 5, 7, 10 • Color: 100 dprime/ • Duration of Stimulus: 2 ▪ Use the following method settings: • Number of Trials: 20 • Percentage with a Signal: leave at 50 ▪ 320 trials total ▪ Report your observations on effects of speed and number of dots in terms of signal detection theory (i.e., hits, misses, false alarms, and correct rejections). ▪ How do each of these factors affect d-prime? (sensitivity) and criterion? Speed=1 # Dots 10 d-prime: C: Hits: Misses: False Alarms: Corr Rejections: #Dots 25 d-prime: C: Hits: Misses: False Alarms: Corr Rejections: #Dots 50 d-prime: C: Hits: Misses: False Alarms: Corr Rejections: #Dots 75 d-prime: C: Hits: Misses: False Alarms: Corr Rejections: Speed=5 d-prime: C: Hits: Misses: False Alarms: Corr Rejections: Speed=7 d-prime: C: Hits: Misses: False Alarms: Corr Rejections: Speed=10 d-prime: C: Hits: Misses: False Alarms: Corr Rejections: d-prime: C: Hits: Misses: False Alarms: Corr Rejections: d-prime: C: Hits: Misses: False Alarms: Corr Rejections: d-prime: C: Hits: Misses: False Alarms: Corr Rejections: d-prime: C: Hits: Misses: False Alarms: Corr Rejections: d-prime: C: Hits: Misses: False Alarms: Corr Rejections: d-prime: C: Hits: Misses: False Alarms: Corr Rejections: d-prime: C: Hits: Misses: False Alarms: Corr Rejections: d-prime: C: Hits: Misses: False Alarms: Corr Rejections: d-prime: C: Hits: Misses: False Alarms: Corr Rejections:
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The Signal Detection Experiment
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1. When an auditory signal is presented, the decision variable will have a greater value in
listeners with more sensitive hearing. Therefore, changing the number ...


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