PSY 323: Perception

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Tidbits of Perception and Humane Society Animals
5/5/2016
If you are having withdrawal symptoms from being done with PSY 323, you can visit this page to get an occasional dose of perception. Exam 3 Grades:
5/4/2016
Grades for both sections of the class for the final exam are available from Isidore. The mean was 42.9 out of 50 points (85.7%) with a standard deviation of 5.5 (11.1%). The following histogram shows the distribution of grades for the final exam. Have a Great Summer!:
5/4/2016
The color of the text does not change -- only the lines fade in and out. Get Involved in Research:
5/4/2016
If you want really good letters of recommendation for graduate school or a great reference for a job, you need to get involved in research. Working with a faculty member on research allows the faculty member to get to know you so they can write that really good letter. Doing research also gives you skills that you will need for a Ph.D. program in psychology and skills that employeers find valuable. I would be glad to work with you on research on perception. Drop by or email me if you are interested. Section 1 (11:15 AM) Exam 3 Grades:
5/2/2016
Grades for the final exam are available from Isidore. The mean was 42.5 out of 50 points (85.1%) with a standard deviation of 5.9 (11.8%). The following histogram shows the distribution of grades for the final exam. Have a great summer! Quiz 12 Grades:
4/27/2016
Grades for the last quiz are available from Isidore. The mean was 8.2 out of 10 points with a standard deviation of 1.5. The following histogram shows the distribution of grades for the last quiz. Miracle Fruit
4/27/2016
The miracle fruit tablets used in the class demonstration are from a company called MBerry and are available from Amazon.com by searching for miracle fruit. Amazon also offers the actual berries. If you have a good background in biology and are up to some heavy duty reading, you can read about the biological basis of how miracle fruit works at doi:10.1073/pnas.1016644108. A less technical article is also available. End of Semester Stuff:
4/27/2016
- The student evaluation of teaching should be completed before 11:59 PM on April 29, 2016.
- The final exam for the 11:15 AM section is Monday, May 2, from 12:20 to 2:10 PM.
- The final exam for the 12:20 PM section is Wednesday, May 4, from 2:30 to 4:20 PM.
- These activities will help you prepare for the first section of the final exam. Spelling matters on the exam.
- This handout will help you prepare for the second section of the final exam.
- One of these questions will be the essay question on the final exam. If you have questions about these questions, you will need to visit me during office hours or set up an appointment. I will not answer such questions during class. When you visit, you will need to demonstrate that you have tried to answer the question.
Office Hours for Final Exams Week:
4/21/2016
During final exam week, my office hours will be: If You Have Not Started Studying for the Final Exam...:
4/21/2016
If you haven't started studying for the final exam, then you need to do so now. The final exam, being cumulative, covers too much material for you to attempt to study it the night before (or day of!) the exam. Don't jeopardize your final grade by failing to adequately prepare for the final exam. See the entries called "Section 1 of Exam 3 / Final Exam" posted on 4/14, "Essay Questions for Exam 3" posted on 4/1 and "Final Exam" posted on 3/29 for more information about what to expect on the final exam. Student Evaluations of Teaching:
4/19/2016
The student evaluation of teaching is available at http://go.udayton.edu/set until 11:59 PM on April 29, 2016. Please take time to complete the evaluation. Quiz 11 Grades:
4/18/2016
Grades for the 11 Section 1 of Exam 3 / Final Exam
4/14/2016
For the third, and final, exam, you will be asked to label parts of the human olfactory and gustatory systems. The diagram corresponds to Figure 13.5(a) in your textbook. The diagram can also be found on slide nine in the lecture slides for chapter 13. You can test your ability to recognize the parts of the olfactory system with this activity. On the exam, you will need to be able to write / recall the labels. If you want practice recalling the labels, use this activity instead. The computer, like my grading on the final, will be unforgiving of mistakes in spelling. Quiz 11 Probably Will Be Given on Monday, 4/18;
Quiz 12 Probably Will Be Given on Wednesday, 4/27: 4/14/2016
Updated 4/25/2016 Quiz 11 will likely be given on Monday, 4/18. The last quiz, quiz 12, will likely be given on Wednesday, 4/27. Quiz 12 will be given at the start of class on Wednesday, 4/27. Quiz 10 Grades:
4/13/2016
Grades for the 10 Lab 3 Grades:
4/11/2016
Grades for the third lab are available from Isidore. The mean was 8.4 out of 10 points with a standard deviation of 2.7. The following histogram shows the distribution of grades for the third lab.
Quiz 9 Grades:
4/8/2016
Grades for the 9 Quiz 10 Will Be Given on Wednesday, 4/13:
4/8/2016
Quiz 10 will be given on Wednesday, April 13. The material covered on the quiz starts with the slide on the neural basis of music perception in chapter 11 and ends with whatever we get to on April 11. Monday 4/11 Is the Last Day to Withdraw:
4/5/2016
Monday, April 11, is the last day to withdraw from a course. If you currently have a grade below C- in this course, I strongly encourage you to drop the course. While a "W" (withdrawal) grade isn't great on your transcript, it is a lot better than a "D" or an "F." You can check your grade on Isidore / Sakai. Quiz 9 Will Be Given on Friday, 4/8:
4/4/2016
Quiz nine will be given on Friday, April 8. The material covered on the quiz starts with distance localization in chapter 10 and ends with whatever we get to on April 6. Lab 3 Is Due on Monday, 4/11:
4/4/2016
Lab three is due at 11:15 AM on Monday, 4/11. For more information, scroll down to the Lab 3 announcement dated 3/29/2016. Office Hours for Wednesday, 4/6:
4/4/2016
Due to a conflicting meeting, my office hours on Wednesday, 4/6, will be from 1:20 to 1:55 PM. If this is inconvenient for you, please email some times that are better and I will pick one that also works for me. Quiz 8 Grades:
4/1/2016
Grades for the eighth quiz are available from Isidore. After adding one point to everyone's score, the mean was 8.0 out of 10 points with a standard deviation of 2.1. The following histogram shows the distribution of grades for the eighth quiz. Essay Questions for Exam 3
4/1/2016
One of these questions will be the essay question on the third exam (which is the final exam.) Lab 3:
3/29/2016
Lab three investigates the interaural time difference and interaural level difference for sounds with lower (600 Hz) and higher (2000 Hz) frequencies in auditory lateralization (which is like auditory localization but with headphones / earbuds.) The study must be done with earbuds or headphones. Always practice safe listening. Always start with a very low volume level and gradually increase it to a reasonable level. If a person standing next to you can hear the sounds while you have the ear buds in your ears, then you have the volume level too high and you must decrease it. The hair cells in the inner ear can be easily, quickly and permanently damaged by loud sounds. The effect of loud sounds is cumulative -- you may not notice the damage now, but each time you expose yourself to loud sounds, you move closer to permanently damaging the hair cells and the resulting loss of hearing. You will hear a sound that, hopefully, will appear to move from left to right or from right to left. Your task is to indicate which direction the sound appears to move. If necessary, guess. The experiment manipulates two factors -- the frequency of the sound (low vs. high) and the type of localization cue used (only ILD, only ITD, both ILD and ITD.) Thus, it is a 2 X 3 factorial design. Given what you know about auditory localization (from class and from the background material given in the lab), make a prediction about the outcome of the study before you do the study-- for the low frequency sounds, which type(s) of cue should be best for localization / lateralization? For the high frequency sounds, which type(s) of cue should be best for localization / lateralization? Make your predictions before doing the study. Lab three will be available from Sakai / Isidore starting on Wednesday, 3/30. The assignment is due no later than 11:15 AM on Monday, April 11, 2016. Submit your lab report via Sakai / Isidore. Final Exam:
3/29/2016
The final exam for section one (the class that meets at 11:15 AM) is from 12:20 to 2:10 PM on Monday, May 2. The final exam for section two (the class that meets at 12:20 PM) is from 2:30 to 4:20 PM on Wednesday, May 4. Plan on attending the final exam for the section that you are enrolled in. The final exam is cumulative / comprehensive. That is, it includes material since the first day of class and the first chapter in the textbook. The multiple choice section of the exam will have one or two questions from each of the following chapters: 1, 2, 3, 4, 5, 6 and 9. It will have two or three questions from each of the following chapters: 10, 11, 12 and 13. This handout contains a partial list of possible topics that might be covered in the multiple choice section of the final exam. If you have not been reviewing the previous chapters throughout the semester, I strongly encourage you to start doing so now. A few minutes each day spent reviewing the material is much better than spending the same number of minutes reviewing the material on the day (or two) before the exam. Besides having much better long term retention of the material, spending a few minutes each day is often much more pleasant than studying in one large block of time. Quiz 8 Probably Will Be Given on Friday, 4/1:
3/22/2016
Quiz eight likely will be given on Friday, April 1. The material covered on the quiz starts with chapter 10 and ends with whatever we get to on the class period before the quiz. Exam 2 Grades:
3/21/2016
Grades for the second exam are available from Isidore. The mean was 42.8 out of 50 points (85.7%) with a standard deviation of 4.7 (9.4%.) The following histogram shows the distribution of grades for the second exam. Cochlear Implant Demonstrations:
3/18/2016
The cochlear implant demonstrations (and several other useful demonstrations) that I played in class are available from the Auditory Neuroscience web site. Lab 2 Grades:
3/16/2016
Grades for the second lab are available from Isidore. For those who submitted a lab report, the mean was 9.8 out of 10 points with a standard deviation of 0.4. The following histogram shows the distribution of grades for the second lab. Quiz 7 Grades:
3/16/2016
Grades for the seventh quiz are available from Isidore. For those who took the quiz, the mean was 7.6 out of 10 points with a standard deviation of 1.7. The following histogram shows the distribution of grades for the seventh quiz. Do You Hate Fingernails Scraping on a Chalkboard?:
3/15/2016
If the sound of fingernails scraping on a chalkboard sends shivers up your spine, this very short ScienceNow summary will help you understand why that sound is so annoying. The resonance of the auditory canal and top-down processing both play a role. Happy π Day!:
3/14/2016
Happy π Day! Quiz 7 Is Wednesday, 3/16:
3/11/2016
Quiz seven will be given on Wednesday, March 16. The material covered on the quiz starts with the "Integrating Depth Cues" slide and ends with whatever we get to on Monday, 3/14 (which is π Day!). PetePetunia Needs Has Found a Home:
3/11/2016
3/18/2016
Quiz 6 Grades:
3/9/2016
Grades for the sixth quiz are available from Isidore. The mean was 8 out of 10 points with a standard deviation of 1.9. The following histogram shows the distribution of grades for the sixth quiz. Exam 2 Is Monday, 3/21:
3/7/2016
The second exam will be held on Monday, March 21 during the normal class period. Exam two covers material in chapters five (color), six (depth) and nine (hearing.) The exam consists of three parts -- 1) labeling parts of the ear (10 points), 2) 20 multiple choice questions (30 points), and 3) an essay question (10 points.) Section 1 of Exam 2
3/7/2016
For the second exam, you will be asked to label parts of the human ear. The diagram corresponds to Figure 9.10 in your textbook. The diagram can also be found on slide 12 in the lecture slides for chapter nine. You can test your ability to recognize the parts of the ear with this activity. On the exam, you will need to be able to write / recall the labels. Essay Questions for Exam 2
3/7/2016
One of these questions will be the essay question on the second exam. Quiz 6 Is Wednesday, 3/9:
3/7/2016
Quiz six will be given on Wednesday, March 9. The material covered on the quiz starts with motion parallax and ends with whatever we get to on Monday, 3/7. R.I.P. Chapter 8:
3/7/2016
Material in chapter 8, Attention and Awareness, will not be included on any quiz or exam in this class. Lab 2:
3/7/2016
Lab two investigates five variants of the Müller-Lyer illusion. Many believe that the Müller-Lyer illusion arises because of the misperception of depth. You will collect some data (this should take no more than a few minutes), create an explanation for why some variants produce a stronger or weaker illusion than others, and then read some common explanations of the Müller-Lyer illusions. Finally you will compare or contrast your explanation to one of the common explanations. Lab two is available from Sakai / Isidore. The assignment is due no later than 11:15 AM on Wednesday, March 16, 2016. Submit your lab report via Sakai / Isidore. Anaglyphs:
3/7/2016
The anaglyph generator that I showed you in class is available here. To properly view the anaglyph shown above, you need a pair of red (left eye) / cyan (right eye) glasses. There should be a pair between pages 204 and 205 of the textbook. If you make a really good (shows a lot of depth) anaglyph, please email it to me and I will share it with the class. Quiz 5 Grades:
3/4/2016
Grades for the fifth quiz are available from Isidore. The mean was 10.6 out of 10 points with a standard deviation of 1.3. The following histogram shows the distribution of grades for the fifth quiz. Kinetic Depth Effect (Motion As a Depth Cue):
3/4/2016
Here is the kinetic depth effect demonstration. Quiz 5 Is Friday, 3/4:
3/1/2016
Quiz five will be given on Friday, March 4. The material covered on the quiz starts with the opponent process theory of color vision and ends with whatever we get to on Wednesday, 3/2. Some of you have not been doing well on the quizzes. You should be studying every day (not just the night before or morning of the quiz), reading and taking notes from the textbook, reviewing your lecture notes and using the resources available on the class web site and the textbook's web site (link on the left.) If you don't understand something, first try to figure it out for yourself (being an active learner is very important) and then come see me and I'll do my best to help. Frequent, effortful, testing of yourself is as important (some research says more important) than simply reviewing the material. Visual Angle Activity:
2/29/2016
The visual angle activity explains what a visual angle is and allows you to explore how the visual angle is influenced by the size and distance of an object. Fred Has Found Needs a Home:
2/29/2016
Updated 3/2/2016
Have a Great, Safe Break:
2/24/2016
I hope you have a great and safe break. Quiz 4 Grades:
2/24/2016
Grades for the fourth quiz are available from Isidore. For those who took the quiz, the mean was 7.7 out of 10 points with a standard deviation of 1.9. The following histogram shows the distribution of grades for the fourth quiz. Metamers Activities
2/22/2016
You can use this activity to try to make metameric matches. You can use this activity to test your understanding of why metameric matches require three lights. Color Vision
2/18/2016
Quiz 4
2/18/2016
The fourth quiz will be given in class on Wednesday, 2/24. The quiz covers whatever material we get to in class on Friday, 2/19, and Monday 2/22. Dimensions of Color Activity
2/18/2016
You can use this activity to explore the dimensions (hue, saturation and brightness) of color. Subtractive and Additive Mixtures
2/18/2016
You can use this activity to explore the differences between subtractive and additive mixtures. Exam 1 Grades:
2/17/2016
Grades for the first exam are available from Isidore. The mean was 42.3 out of 50 points (84.7%) with a standard deviation of 4.5 (9.1%.) The following histogram shows the distribution of grades for the first exam. Quiz 3 Grades:
2/10/2016
Grades for the third quiz are available from Isidore. For those who took the quiz, the mean was 7.9 out of 10 points with a standard deviation of 1.9. The following histogram shows the distribution of grades for the third quiz. Note that Sakai / Isidore is set to drop your lowest two quiz grades. Now that you have taken three quizzes, it is dropping the lowest two. This tends to inflate the grade reported by Sakai / Isidore. Quiz 3
2/5/2016
The third quiz will be given in class on Wednesday, 2/10. The material on the quiz starts with dark adaptation in chapter two. Retinal Ganglion Cell
2/5/2016
This activity allows you to explore the activity of a retinal ganglion cell in response to an edge. Since all visual information is filtered through the retinal ganglion cells, understanding how retinal ganglion cells respond is important to your understanding of perception. Essay Questions for Exam 1
2/3/2016
One of these questions will be the essay question on the first exam. Exam 1 Is Wednesday, 2/17
2/3/2016
The first exam will be given on Wednesday, February 17. The exam consists of three sections: labeling (see the entry on 1/27 for more details), 20 multiple choice questions and an essay question (see the entry directly above for more details.) There will be time in class on Monday, February 15, for review and questions. I strongly encourage you to start studying now. There is a lot of material on the exam. Learning theories (and data) tell us that, for this type of task, it is much better to study a little on each of several days than to spend the same amount of time studying on a few days. Lab 1 Grades
2/2/2016
Grades for the first lab are available from Isidore. The mean was 9.1 out of 10 points with a standard deviation of 0.5. The following histogram shows the distribution of grades for the first lab. Quiz 2 Grades
2/1/2016
Grades for the second quiz are available from Isidore. The mean was 7.8 out of 10 points with a standard deviation of 2.3. While the mean is lower than I had hoped for, over 40% of the class earned an A (9, 10 or 11 points) on the quiz. The following histogram shows the distribution of grades for the second quiz. If you are disappointed in your grade, you might want to follow the advice on the How To Study page. That advice is based on psychological research. You should be reading the textbook; doing so is especially important if you miss a class. If you miss a class, check the class website to see if any quizzes might be coming soon. Quiz 2
1/29/2016
The second quiz will likely be given in class on Monday, 2/1 or Wednesday, 2/3. It probably will not be a take-home quiz. Textbook's Web Site
1/29/2016
The textbook has a website which is available from the link on the left. For each chapter, there is a quiz (it does not contribute to your grade in the class, but can be used to see if you are understanding the material), learning objectives and flashcards. Hue, Saturation and Brightness
1/27/2016
This activity allows you to independently manipulate the hue, saturation and brightness (value) of a color. Quiz 1 Grades
1/27/2016
Grades for the first quiz are available from Isidore. The mean was 9.9 out of 10 points with a standard deviation of 2. The following histogram shows the distribution of grades for thefirst quiz. Section 1 of Exam 1
1/27/2016
The first section of each exam involves labeling the parts of a sensory or perceptual system. For the first exam, you will be asked to label parts of the human eye. The diagram corresponds to Figure 2.8 in your textbook. The diagram can also be found on slide 11 in the second set of lecture slides. You can test your ability to recognize the parts of the eye with this activity. On the exam, you will need to be able to write / recall the labels. Quiz 1 Is Due at the Start of Class on Wednesday, 1/27
1/25/2016
Quiz one will be a take home quiz. Future quizzes will be in-class quizzes. Quiz one is due at the start of class on Wednesday, January 27. Office Hours for Monday, January 25
1/25/2016
Last week I got appointed to a committee -- lucky me! That committee already had a meeting scheduled for 2 PM on 1/25 -- in the middle of my normal office hours. For 1/25 only, my office hours will run from 1:20 to 1:55 PM. If you want to see me outside that window of time, please email me a list of times that you are available and I will pick one that also works for me. Lab 1: Psychophysical Laws: Fechner's vs Stevens'
1/22/2016
Lab 1 is available from Sakai / Isidore. The assignment is due no later than 11:15 AM on Monday, February 1, 2016. Submit your lab report via Sakai / Isidore. Visit http://elvers.us/perception/laws/ and read the background information about psychophysical laws. More detailed information about Fechner's and Stevens' laws can be found on pages 26 to 28 of the textbook. Following the instructions on that page, do the study. For each of large patches of light that is presented, enter a number between 1 (black) and 100 (white) to indicate how bright you think the large patch of light is. Even though there are a lot of judgments to be made (55 of them) each judgment should take no more than a couple of seconds to make. You should spend no more than a couple of minutes to do the study. Retrieve the lab report, answer the questions and turn the completed lab report in via Sakai / Isidore. The lab report asks you to look at the Wikipedia page on Stevens' power law. When submitting your completed lab report, submit only one attachment in MS Word format. Include the file extension (.docx or .doc) when uploading the file. Using Weber's Law
1/22/2016
You should be able to apply Weber's law. That is, you should be able to calculate the Weber fraction, k, given the intensities of two stimuli that are just noticeably different from each other. Given k, you should also be able to determine how intense one stimulus has to be, relative to another stimulus, in order to tell that the two stimuli are different intensities. This web page will help you practice these calculations. Copies of Slides
1/20/2016
Copies of the slides with room to take notes are available from the Slides link in the list on the left. You will need a password to access the slides. The password is available from Sakai (otherwise known as Isidore at UD.) Quiz 1
1/20/2016
The first quiz will likely be given in class on Monday, 1/25 or Wednesday, 1/27. Welcome!
12/4/2015
I hope that you find this class as interesting as I find perception. Perception is a fundamental part of our lives and an understanding of how we perceive is essential for understanding the human experience. |

^{*}The time until the next exam is based on your computer's clock.

If your computer's clock is wrong, the time until the exam will be wrong too.