New User Special Price Expires in

Let's log you in.

Sign in with Facebook


Don't have a StudySoup account? Create one here!


Create a StudySoup account

Be part of our community, it's free to join!

Sign up with Facebook


Create your account
By creating an account you agree to StudySoup's terms and conditions and privacy policy

Already have a StudySoup account? Login here

CIS 140 Week 5

by: Alexis Mitchnick

CIS 140 Week 5 CIS 140

Alexis Mitchnick

Preview These Notes for FREE

Get a free preview of these Notes, just enter your email below.

Unlock Preview
Unlock Preview

Preview these materials now for free

Why put in your email? Get access to more of this material and other relevant free materials for your school

View Preview

About this Document

Covers Tuesday 9/27 lecture on memory sources of error
Intro to Cognitive Science
David Hoyt Brainard, Lyle H Ungar
Class Notes
memory, memory and cognition
25 ?




Popular in Intro to Cognitive Science

Popular in Cognitive Science

This 3 page Class Notes was uploaded by Alexis Mitchnick on Monday October 3, 2016. The Class Notes belongs to CIS 140 at University of Pennsylvania taught by David Hoyt Brainard, Lyle H Ungar in Fall 2016. Since its upload, it has received 4 views. For similar materials see Intro to Cognitive Science in Cognitive Science at University of Pennsylvania.


Reviews for CIS 140 Week 5


Report this Material


What is Karma?


Karma is the currency of StudySoup.

You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!

Date Created: 10/03/16
Tuesday, September 27, 2016 CIS 140 Week 5 Memory - Themes: - can remember a lot for a long time - memory still has limited capacity - Source confusion error: 2 things that have occurred at a different time are combined in memory as one event - Painting window case study: wider angle in painting, indicates combining multiple views (again, combining multiple instances) — “memory is a reconstruction” - What has to happen for correct episodic memory: - encode a specific event - store it for retrieval sometime later - associate retrieved items with correct context (memory binding problem) - Change Blindness (demo): visual encoding is limited - only a small fraction of the image information that reaches the eye is extracted - how to quantify this — can use an eye tracker to see what parts of the image they scan, use a recall experiment (show image, have subject write down what they saw) - Information from Images graph — Presentation Duration vs. Items Recalled — creates a slightly concave down curve - Refining the experiment: recall location of objects, use more abstract objects - Sperling Full Report Experiment — same as before, but image will only consist of letters and numbers on a white background, see as many letters/numbers you can remember - usual result is 4 letters/numbers: only 4 items was encoded during the time span, OR all items encoded but could not get all items stored in memory - Sperling Partial Report Experiment — same as before, but arrow appears after image goes away, must try to recall only the items in that specific row 1 Tuesday, September 27, 2016 - (fraction recalled in cued row) * (total number in display) - in Sperling’s experiment: Reports showed subjects were able to recall more when doing a partial report rather than full report - Visual encoding summary:bottleneck is extracting image information before that information fades from ‘iconic’ visual store - because not all info from our experience is encoded into memory, we shouldn’t be surprised that memory is imperfect - Free Recall: subject sees list of words one at a time for a few seconds each and try to remember them.. after subject finishes, write down all words remembered in any order - beginning words and end words remembered better than middle words (primacy and recency effects, respectively) - What can we manipulate to test the primacy effect? change experiment to numbers, make the numbers at the beginning longer/harder, create a distraction that makes it harder to rehearse, shortening the delay - Can change the primacy effect without changing the recency effect. Vise versa? Can make subject wait a minute before recalling words, can make them preform a different task/show them more uncounted words before recalling - Free Recall Double Dissociation: Can change recency while leaving primacy unchanged and vise versa (thus, two separate processes).. in this DD, no lesions, etc. Instead, used experimental manipulations to independently modify the two effects - Source error in episodic memory: Dr. Brainard’s car example — the dominant memory of parking the car is in the close lot, so searching the close lot when was actually parked in the far lot is a source error - Interlist intrusions is ex. of source error of memory — experiment of list recall, sometimes recall some list 1 or 2 words when trying to recall list 3 (more likely if word is similar to a word on list 3, and more likely to recall more words from around the word on list 1) - something about word order is stored together (provides evidence for long term memory that associates things with their context) 2 Tuesday, September 27, 2016 - Memory Conjunction errors: words and/or images can be combined together — feature-based source errors, (ex. — words combined together from a given list, features of faces combined together from series of images) - Place cell experiment/place cell mapping: place cells in hippocampus fire when animal is in specific place, helps later on with forming context for episodic memories 3


Buy Material

Are you sure you want to buy this material for

25 Karma

Buy Material

BOOM! Enjoy Your Free Notes!

We've added these Notes to your profile, click here to view them now.


You're already Subscribed!

Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'

Why people love StudySoup

Jim McGreen Ohio University

"Knowing I can count on the Elite Notetaker in my class allows me to focus on what the professor is saying instead of just scribbling notes the whole time and falling behind."

Kyle Maynard Purdue

"When you're taking detailed notes and trying to help everyone else out in the class, it really helps you learn and understand the I made $280 on my first study guide!"

Jim McGreen Ohio University

"Knowing I can count on the Elite Notetaker in my class allows me to focus on what the professor is saying instead of just scribbling notes the whole time and falling behind."


"Their 'Elite Notetakers' are making over $1,200/month in sales by creating high quality content that helps their classmates in a time of need."

Become an Elite Notetaker and start selling your notes online!

Refund Policy


All subscriptions to StudySoup are paid in full at the time of subscribing. To change your credit card information or to cancel your subscription, go to "Edit Settings". All credit card information will be available there. If you should decide to cancel your subscription, it will continue to be valid until the next payment period, as all payments for the current period were made in advance. For special circumstances, please email


StudySoup has more than 1 million course-specific study resources to help students study smarter. If you’re having trouble finding what you’re looking for, our customer support team can help you find what you need! Feel free to contact them here:

Recurring Subscriptions: If you have canceled your recurring subscription on the day of renewal and have not downloaded any documents, you may request a refund by submitting an email to

Satisfaction Guarantee: If you’re not satisfied with your subscription, you can contact us for further help. Contact must be made within 3 business days of your subscription purchase and your refund request will be subject for review.

Please Note: Refunds can never be provided more than 30 days after the initial purchase date regardless of your activity on the site.