Subject Code :- BEHV2010
Title :- Perception
Assignment 2 :- Tutorial worksheet 1
Team/Individual task :- Individual
Word/time limit :- 100 words (+/- 10%)
Weighting :- 5%
After you have read this information, head over to the Assignment 2 Q&A discussion board to ask any questions and see what your peers are saying about this assignment.
BEHV2010 Perception Assignment
Assignment overview :-
This assignment is a mandatory submission which means that in order to pass this subject of study, you must submit this assignment.
For this assignment you are required to complete and submit a number of worksheets related to the experiments you will conduct in different modules and their ac companying learning materials. Each work sheet contains a number of analytical questions concerning your observations and/or results.
This assignment supports Subject Learning Outcomes 1, 2 and 3.
If your studies have been adversely affected by circumstances beyond your control you may request an extension using the following options.
Note: A request must be made within 48 hours of the assignment due date.
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Assignment details :-
For this assignment submission you will need to complete the Module 2 worksheet on the topic of Vision: Light the retina and perceptive fields. The details of the experiment can be found on 2.4 Experiment: Measuring the blind spot.
To complete this worksheet you will need to download the following worksheet:
Worksheet 1 – Measuring the blind spot (DOCX 162 KB) Download Worksheet 1 –
Measuring the blind spot (DOCX 162 KB).
Use your feedback from this worksheet to support your completion of the remaining worksheets for this subject.
BEHV2010 Perception Assignment
Supporting documents
Refer to the assignment resources and referencing sections of this subject’s Leganto reading list on the following topics:
From your eText: Chapter 2: The first steps in vision: from light to neural signals
What is the blind spot of the eye?
What is pupillary distance and how do you measure it?
American Psychological Association (APA) referencing style guide (PDF 756 KB) (Western Sydney University Library, 2020).
Library Study Smart—a library resource that will assist you in completing your assignments (Western Sydney University Library, 2021).
Western Sydney University Library has further information about referencing on their Referencing and citation page.
2.4 Experiment: Measuring the blind spot
Through out the subject, you will engage in a number of small-scale experiments some of which you will be required to submit as part of Assignment 2: Tutorial worksheets.
Make sure you have familiarised yourself with the requirements of this assignment before proceeding with any experiments in this subject.
This experiment and the completion of its worksheet are the requirement of Assignment 2: Tutorial worksheet 1.
The blind spot is an area in both eyes that does not perceive the visual field. It is the result of the location of the optic disk and the optic nerve in relation to the macular region the part of the retina located at the back of the eye. The macular has a very high concentration of photoreceptor cells that are responsible for sending signals to the brain for image processing. The situation of both of these parts relative to each other is shown in the following image.
BEHV2010 Perception Assignment
Composition of the eye – the optic disk and macular with relation to the fundus.
Location of the optic disk and macular in the human eye (2019) courtesy of Dr John
Cass
Experimental procedure: The blind spot
For the following experiment, you will need a pencil, tape and a ruler or measuring tape.
You are going to measure the width of the blind spot in your right eye.
BEHV2010 Perception Assignment
Step 1: Download and print the following worksheet Worksheet 1 – Measuring the blind spot (DOCX 162 KB) Download Worksheet 1 – Measuring the blind spot (DOCX 162 KB). You will use page 1 to conduct the experiment. Use page 2 to record your results and measure your blind spot.
Step 2: Attach page 1 of the worksheet horizontally to a wall so the cross is at eye-level. With a pencil in hand stand at arm’s length from the sheet. Measure the distance between the sheet to your face. Mark this as ‘D’ on your worksheet.
Step 3: Cover your left eye with your left hand and stare at the cross. Do not remove your gaze from this fixation point. Then with the pencil in your right line it up with the red cross and slowly begin to move it to the right. At some point, the tip of the pencil will disappear. Mark a vertical line at this point.
Step 4: Still covering your left eye and staring at the cross, begin to move your pencil further to the right. Although initially invisible at some point the pencil will reappear. Mark a vertical line at this point.
BEHV2010 Perception Assignment
Step 6: Repeat steps 2 and 3 nine more times. You should end up with some thing similar to the following image.
Experiment 1 example of A B locations
Step 7: Use your measuring tape to locate the middle point of each of the two groupings. Mark these centre points, and label the left centre point ‘A’ and the right centre point ‘B’. You will take these to be the inner and outer limits of the right eye’s blind spot.
BEHV2010 Perception Assignment
Step 8: Use your measuring tape to determine the following:
What is the distance between the fixation point and point A?
What is the distance between fixation point and point B?
What is the distance of B–A?
Step 9: It is now time to calculate the width of your blind spot of your retina. Use the A, B and C values you have identified in this activity to complete your calculation in Worksheet 1 – Measuring the blind spot (DOCX 162 KB) Download Worksheet 1 – Measuring the blind spot
Step 10: Now that you have completed the experiment, answer the following questions:
What did you observe from this activity?
Given your understanding of retinal information processing outlined in your readings from this module what explanation could there be for there being a blind spot in the each eye?
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