Final Flashcards
What is the hypothesis for the WLE?
The number of words remembered should be higher in the short word condition and should be lower in the long word condition
What is the IVs and DV(s) for the WLE?
IVs: Length of words being presented (short/long)
DVs: The number of words recalled
What type of Design was the WLE?
Within
True Experiment?
No, because studies that involve IVs that are subject variables can not be true experiments
What is the theory for the WLE?
Rehearsal Rate
What are the 2 conditions that are required in order for the experiment to be true?
- ) all IVs must be directly MANIPULATED by the experimenter
- ) Sub. must be RANDOMLY ASSIGNED to the condition(s) each and every independent variable
What type of test is used for the WLE?
t-test which is used to compare only 2 means
What 2 types of t-test are there?
directional: one-tailed (ones means is higher than the other)
non-directional- two-tailed test
ANOVA
Used to compare two or more means
Correlational
Used to examine the relationship between two variables
Aristotle’s Wax Tablet
Described memory as a wax tablet in which experience writes and leaves impressions
Wax Tablet
used frequently to seal envelopes, wax over time degrades, impressions can rub off over time just like memory after time the impressions in memory fade
Computer metaphor
describes memory as a metaphor that stores and retrieves information
What are the two parts that the computer metaphor divides memory info. into?
Hardware and Software
Hardware
Structures in the brain related to remembering and forgetting
What is a part of the brains “hardware”?
Hippocampus
The hippocampus is?
(core of the brain) it is the ability to form new memories
What are 2 diseases related to the Hippocampus
Alzheimer’s and Korsakoff’s
Software
Strategies used for processing memory
What are 3 strategies that the brain uses under the computer metaphor
Rehearsal, Organization, Elaborations
(Computer metaphor) Rehearsal
Refers to the repetition of info as you are repeating it
(Computer metaphor) Organization
the ability to combine items on a list into meaningful units
(Computer metaphor)n Elaborations
the ability to associate new information w/old information
Fixed Capacity (car trunk) assumption
STM capacity has a fixed upper limit that can not be exceeded
Upper limit of STM is?
7/-2 (5 to 9 items)
Assumption of efficiency
STM capacity depends on the efficiency with which information is processed in STM
What is the typical measure of efficiency?
Rehearsal Rate
Rehearsal Rate is?
how quickly you can rehearse items
Case’s Efficiency Model
Developmental model that attempts tp explain age capacities
The purpose of Case’s Efficiency model?
attempts to explain the growth in STM capacity that is typically observed in childhood (6-18)
What are the the 2 components that Case’s Efficiency divides the model into?
Storage Space (SS) and Operating Space (OS)
When referring to Case’s efficiency model what is SS
Storage Space is The amount of capacity available for storing items in STM
When referring to Case’s efficiency model what is OS
Operating Space is the amount of capacity needed to rehearse items in STM
What is the assumption under Case’s efficiency model?
How SS and OS change in childhood. That is the amount of OS needed to rehearse decreases over the course of childhood and the amount of SS available to store items in STM increases during childhood
The result of the assumption relating to Case’s efficiency model?
Better memory from early to late childhood (6-18)
Cow’s Digestive System Assumption and Why
Information flows through memory just as food flows through a cow’s digestive system
This is because like a cow’s digestive system memory has different chambers as well (referring to the Modal Model: STM, SM, LTM)
External Validity
Measure the degree to which the results of the study can be GENERALIZED to people and new contexts
Internal Validity
Measures the degree to which the study is free of confounds that can influence its results
Confounds
Are extraneous variables that the experimenter is not interested in and that can effect the outcome of a study
How do you try to avoid confounds?
By random Assignment
Field Research
research conducted in a relatively uncontrollable environment
Lab Research
research conducted in a relatively controlled environment
External and Internal validity when referring to field and lab research
Field research is HIGH is EXTERNAL validity and LOW in INTERNAL validity
Lab research is HIGH in INTERNAL validity and LOW in EXTERNAL validity
Is lab research always low in external validity?
no, because initially lab research are taken to the field
The Eyeball Test
replicate in the field, show me in the field
Sensory Memory (SM)
refers to the component of memory that takes in sensory impressions from the environment
3 characteristic of SM (capacity, duration, and conscious analysis)
Capacity: is assumed to be larger compared to STM
Duration: is assumed to be shorter compared to STM (1 sec)
Conscious analysis? Not assumed to be possible in SM
Iconic Memory
refers to SM for visual information
Echoic Memory
refers to SM for auditory information
Immediate Memory
The component of memory that holds information that you are conscious of right now
3 Characteristics of Immediate memory (capacity, duration, and conscious analysis)
Capacity: compared to SM is relatively small
Duration: Compared to SM is relatively long
Subconscious Analysis? Yes, is assumed to be required
Short Term Memory
component in immediate memory that only allows information to be HELD in immediate memory
Working Memory
Is the component in immediate memory that allows information to be HELD, MANIPULATED, and TRANSFERRED
Generic Memory
(LTM) component of memory that holds all the information you have learned over the lifespan which can be conscious and unconscious
3 Characteristics of generic memory (capacity, duration, and conscious analysis)
Capacity: assumed to be unlimited and is not scientific because it can not be tested
Duration: assumed to be a lifetime and is not scientific because it can not be tested
Conscious analysis?Not to be possible unless transferred to immediate memory
Semantic Memory:
Generic memory for the meanings of definitions and meaning of words, concepts, and ideas
Episodic Memory:
(Autobiographical) Generic Memory for episodes and events in life that you can experience
Procedural Memory
refers to generic memory for how to do things and how to perform certain tasks
Declarative Memory
refers to generic memory for knowledge and information that can be verbalized (written/spoken)
(Plato’s Concept of Forms) Forms:
refers to the essential knowledge of things in the world
(Plato’s Concept of Forms) Assumption:
Everything that there is to know about the world is stored into memory at birth
(Plato’s Concepts of Forms) Implications:
If everything that there is to know about the world is stored at birth than the knowledge is to be RETRIEVED later in life
(Aristotle’s Principle’s of Association) Association:
When two ideas become linked in memory so that they are remembered better later on
(Aristotle’s Principle’s of Association) Types of Association
Contiguity, Similarity, and Contrast
Contiguity:
occurs when two ideas occur close in time become associated in memory and are remembered together later on
(i.e. Contiguity + Pavlov’s Dog)
Similarity
occurs when two ideas have similar meanings become associated in memory and are remembered together later on
(Recall Test)
Contrast
Occurs when two ideas with opposite meanings become associated in memory and are remembered together later on
(Free association Task)
Ebbinghaus’s Forgetting Paradigm:
A method for studying forgetting and the rate of forgetting
Procedure (2 Phases)
Learning Phase and Relearning Phase
Ebb. Learning Phase:
: Ebb. pretended to learn list of nonsense syllables until he could remember them perfectly
3 points to Ebb. learning phase:
- nonsense syllables: they can be sounded out but have no inherent meanings
- Ebb. was both the subject and the experimenter
- Ebb studied items perfectly without making any error
Ebb. Relearning Phase
attempted to relearn the original syllables after a short or long delay
Short: 1 min
Long: 1 wk
Results:
Forgetting Curve: describes the rate of forgetting following a short or long delay
What was the Measure that Ebb. used?
% Savings
% Savings:
the amount of time Ebb. saved relearning the nonsense syllables relative to the times spent initially learning the syllables
High % savings meant
Low % savings meant
High %=less forgetting
Low %=more forgetting
Ebb. Forgetting curve Findings:
1st: % savings is high when the delay was short (1min)
2nd: % savings dropped shortly within one hour after learning the syllables
3rd: % savings levels off and does not drop sharply and levels off bw 1 hour and a week
**Less forgetting when the delay was short (1 min) and decreased as the delay increased and then levels off there after
Ebbinghaus’s Studies on Associative Learning:
Direct and Remote Associations
Ebb. Direct Associations:
any items consecutive on a list
Ebb. Remote Associations:
any items not consecutive on a list
Ebb. Assumptions of Associative Learning:
- Items linked by DIRECT ASSOCIATION should be remembered WELL together because he assumed they should be strongly associated with each other
- Items linked by REMOTE ASSOCIATION would be remembered POORLY with each other because he assumed they would be weakly associated with each other
Ebb. Procedure To test Associative Learning Hypothesis
Learning and Relearning Phase of direct association list, remote association list 1 (skipping every other item), remote association list 2 (skipping every two items
Findings of Ebb. Associative Learning Hypothesis
Found that the recall (DV) differed for the different types of lists
Direct Association lists: high levels of recall
Remote Association lists: low levels of recall
** Memory was GOOD when items were presented CLOSE together, in contrast he found that memory was POOR when the items had been presented FARTHER APART from each other
** There was a negative correlation between Recall(DV) and the time b/w item presentations (IV)
Do Ebb. results support Aristotle’s Principle of Contiguity?
Yes
Items that are presented close in time become associated in memory and are remembered well together later on
Serial Position Curve:
Curves when items at the beginning and end of a list are remembered better than items in the middle of the same list
What was used to test and verify the Serial Position Curve?
Serial Recall task
What is the serial recall task?
Subjects presented with a series (one by one) of items and have to remember them as best they can
The findings of these tests created two separate effects:
Primary Effect and Recency Effect
Primary effect
seems to occur because the items presented at the beginning of the
Recency Effect
good recall of the items presented at the end of the list
Contemporary
uses concepts related to the modal model to explain primacy and recency effects
Contemporary explanations to the primacy effect
seems to occur because the primacy items are repeatedly rehearsed and are therefore transferred into LTM where it can be easily retrieved later on
Contemporary explanations to the recency effect
Occurs because the recency items are still active (have not yet faded from STM) and TF can easily be remembered
Hull Theory:
attempts to explain the curve using two concepts (remote associations and interference’s )
Interference
Is when items on a list become confused and TF are remembered poorly
(Hull’s Theory) Assumptions (3)
- Items between MANY REMOTE ASSOCIATIONS should experience HIGH levels of interference and TF should be remembered POORLY
- Items b/w FEW REMOTE ASSOCIATIONS should experience LOW levels of interference and TF should be remembered WELL
- Items b/w NO REMOTE ASSOCIATION should experience NO interference and TF should be remembered the BEST
(Hull’s Theory) Implications
According to Hull’s Theory items at the beginning and the end of the list should be b/w few remote associations and TF be remembered well
Items in the middle of the list re between many remote associations and TF should be remembered poorly b/c they experience high interference
What is the problem with Hull’s theory?
that is can not explain the A-symmetrical shape of the curve that is typically found in real studies, Hull’s theory predicts that it should be perfectly symmetrical which is almost never the case
Jevon’s Study Purpose:
(The black bean study) was to examine iconic memory and how much iconic memory can be held at once
Jevon’s Study Procedure
black beans and a white bucket
- Jevon took a handful of black beans and attempted to toss the handful into the white bucket 10ft away
- He gave his set. immediately after the beans had fallen into the bucket after each trial
- he determined how accurate his set. was by comparing the set. to the number of beans that had actually fallen in the bucket
Jevon’s study Results
- Found his set. were relatively accurate when five or fewer beans had fallen into the bucket
- In contrast he found that his est.. were generally inaccurate when more than five beans had fallen into the bucket
Are the findings found in Jovan’s study consistent with thoughts on sensory memory
No, they are not consistent with thoughts on sensory memory since sensory memory is larger than short term memory it should hold more than 7 items
What was the correlation in Jovan’s study?
Negative corr. b/w beans thrown and estimation accuracy
Averbach’s study Purpose
to examine the capacity of iconic memory
Averbach’s study Procedure:
Step 1
- the number of dots varied trial to trial
- The dots remained on the t-scope for 50 milliseconds at which point they disappeared
Step 2: est the number of dots they though they presented
Averbach’s findings
He focused on the accuracy of the estimates
- found that the accuracy was rather high when 5 or fewer dots were presented
- in contrast accuracy was generally low when more than 5 dots were presented
AGIAN being inconsistent with the assumptions of iconic memory
Sperling’s purpose
to examine the capacity of iconic memory
Sperling’s Procedure
1.Presented with a matrix if digits and letters on a t-scope.
Items were presented randomly.
Presented for 50 milisec. before disappearing.
2. Participants had to recall the items seen on the matrix
Sperling’s findings
Focused on the accuracy of recall
Findings were similar to that of Jovan’s and Averbach’s bc part. remembered 5 items accurately
Observation: important observation led to the partial report study which occurred during the debriefing
What was the observation that was found in Sperling’s study and why was this important
That they ad claimed they had seen the items in the matrix, however the items faded before they could be recalled.
This is consistent with the idea that iconic memory had a large capacity but a short duration
Based on the observation that was found in Sperling’s study is his study consistent with Iconic memory
Yes, bc Sperling assumed that the participant’s had stored all the items in iconic memory but that had faded before they could be recalled
Sperling’s Partial Report technique
Part. had to recall only a portion of items in the display. Portion simply meant only one row
Sperling’s purpose of the partial Report Technique:
to examine the capacity and duration
Partial Report Technique (Procédure)
Step 1: part presented with a matrix of digits and letters for 50 milisec at which point the matrix disappeared
Step 2: part. heard a tone 0-1 seconds after the matrix disappeared in which the pitch of the tone randomly varied form trial to trial. pitch of tone indicated which row had to be recalled
Step 3: Part. had to recall items
What was the assumption of the Sperling’s Partial Report Technique?
If participants had all items stored in iconic memory then they should be able to recall all the items in the cued row before they faded
Merikle’s Test of the pre-categorical assumption:
Tested by asking part. to categorize memory info in iconic memory
Merkle’s general procedure (selective attention)
In these tests part. had to selectively attend to some items in a display while ignoring other items (attending to letters and not digits)
What should happen if iconic memory is pre categorical?
The information remembered should be low, however if they show evidence of being able to selectively attend then that would not support the pre-categorical assumption
Sperlings Findings to to his Partial Report Technique:
Recall was near perfect when the delay was 0 seconds or very short
Recall decreased sharply (as the delay got longer) with increase in the length of delay
Recall was lowest in near floor when the delay was the longest
Are Sperlings findings to his partial report techniques consistent with the key assumptions?
yes
Why does information in iconic memory fade quickly?
Because it is pre categorical (before its possible)
Pre categorical means:
Info in iconic memory cannot be consciously analyzed or categorized bc info with iconic memory faded within 1 sec.
precategorical assumption; to address these cone.
3 conditions-Whole report, partial report by location, and partial report by category
Whole Report
presented with matrix and recalled all items if they could
Partial report by location:
presented with matrix and asked to recall in a particular row
Partial report by category
(Digits or letters) part. had to recall the items by categories, had to recall either digits or letters (hence categorize)
Findings of Merkle’s Precategorical test and implications
(location and category) Indicated that recall in the 2 partial categorical locations was equivalent and high which contradicts assumptions and suggest that part. are able to categorize items in iconic memory
The two Effect of Echoic memory?
Modality and Suffix Effect (traced in the studies using serial and recall tests)
Modality Effect
refer to POOR recency recall when a suffix is presented at the end of a list, occurs when recency recall is better when the items are presented out loud then visually
Suffix Effect
Refer to poor recency recall when a suffix is presented at the end of a list
What is a suffix?
It is a distractor item that is designed to impair recency recall by interfering with recency items
Why is the focus on recency recall?
Bc it goes back to the echoic memory bc the echoic memory holds the echo of recently presented items hence the recency effect
Conrad and Hull’s Modality Effect Study’s purpose:
to examine the modality effect and to see if auditory items will be remembered as visual items
Conrad and Hull’s Procedure
part. were presented with a series of items and had to recall as many as they could
Conrad and Hull’s procedure had two conditions:
Read aloud (acoustic echo) and Read silently (no acoustic echo)
Conrad and Hull’s Findings to their Modality effect study?
(Look at page 30)
modality (auditory items were remembered than visually)
Recency effect was relatively high in the aloud fond and low in the read silently cond.
Are these findings consistent with the modality effect?
yes, but also show that something else might be at work because the primacy effect is high as well…this is rehearsal
Pre-categorical Acoustic Store (PAS)
(used by Conrad and Hull) the component of echoic memory that holds the echo of recently presented auditory info.
PAS explanation of suffix effect:
(Similar) Theory is that in the similar position the similar sub. enters the PAS and INTERFERES with the recency items resulting in low recency recall
(Different) The theory os that the different suffix also enters the PAS but interferes less with the recency items (because it sounds different) resulting in higher levels of recency recall
Crowder’s suffix Effect Experiment (Purpose):
To examine the suffix effect using a procedure
Crowder’s Suffix Effect Experiment (procedure):
part. heard a series of items (digits they had to remember) and the a suffix at the end (no delay)
There were two conditions in Crowder’s affix effect exp. and what design was it?
Speech suffix
Buzzer suffix
(between)
Speech Suffix:
part. heard the word “ready” of “zero”after the last item on the list. (speech sounds)
Buzzer Suffix:
In the suffix condition part. heard a buzzer sound “BZZZZZ” (non-speech sound)
Crowder’s suffix effect predictions:
RECENCY RECALLwas expected to be LOW in the SPEECH cond. (where the acoustic qualities of the suffix overlap with the target items), in contrats the RECENCY RECALL was expected to be HIGH in the BUZZER COND. (where the acoustic qualities of the suffix overlap less with the target items.
Crowder’s Suffix Effect Findings:
Predictions were confirmed, the suffix effect depends on the acoustic qualities of the suffix
If it overlaps it impairs recall , in contrast if the suffix does not over lap the recency recall is relatively unaffected
Modal Model
is a model of memory that consists of 3 diff components which are sensory memory, STM, and LTM
> recap on STM, LTM, SM and its characteristics (3)
2 assumptions of the modal model
Rehearsal is needed to maintain info in STM
Rehearsal is needed to transfer info from STM to LTM
Brown-Peterson Paradigm
(Forgetting in STM) how quickly forgetting how STM is rehearsed