Cognitive information processing
Download
1 / 57

Cognitive Information Processing - PowerPoint PPT Presentation


  • 74 Views
  • Uploaded on

Cognitive Information Processing. Historical context. Symposium on Information Theory at MIT (September 10-12, 1959). Newell & Simon, Chomsky, Miller, Bruner, and many others (see Gardner, 1987, p.28)

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Cognitive Information Processing' - ula


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Historical context
Historical context

  • Symposium on Information Theory at MIT (September 10-12, 1959).

    • Newell & Simon, Chomsky, Miller, Bruner, and many others (see Gardner, 1987, p.28)

  • “Behaviorism spoke to many needs in the scientific community, including some that were quite legitimate . . . Yet, in retrospect, the price paid by strict adherence to behaviorism was far too dear (Gardner, 1987, p. 12).


Historical context1
Historical context

  • “I [Bruner] think it should be clear to you by now that we were not out to “reform” behaviorism, but to replace it. As my colleague George Miller put it some years later, ‘We nailed our new credo to the door, and waited to see what would happen. All went very well, so well, in fact that we may have been victims of our success” (Bruner, 1990, p. 4).


Key features
Key features

  • Representations

  • Computers

  • De-emphasis on affect, context, culture, and history

  • Belief in interdisciplinary studies

  • Rooted in classical philosophical problems (Gardner, 1987)



Stages of information processing
Stages of Information Processing

  • Sensory memory

  • Working memory

  • Long-term memory


Sensory memory
Sensory memory

  • Auditory longer than visual

  • Selective attention

    • Process and select info while ignoring other


Sensory memory1
Sensory memory

  • Selective attention

    • Process and select info while ignoring other

    • Meaning it holds for learner

    • Similarity with other tasks

    • Task difficulty

    • Ability to control attention – differences by age, hyperactivity, intelligence, and LD


Sensory memory2
Sensory memory

  • Automaticity

  • Pattern recognition

    • Template matching – mental copies (what’s the problem with this?)

    • Prototype model

    • Feature model

    • Gestalt principles – what we do when things fail to resemble their prototype

    • Prior experience

      • Stroop effect




Working memory1
Working memory

  • 7 ± 2

  • Chunking

  • Short term (15-30 seconds without rehearsal)

  • Rehearsal

  • Cognitive load

  • Automaticity


Working memory2
Working memory

  • Encoding – how do you do it?

  • Demonstrations


Encoding
Encoding

  • Getting the information from WM to LTM

  • Provide organized information

  • Arrange extensive and variable practice

  • Use strategies for encoding

  • Enhance self-control of information processing (Metacognition – more on this later)


Retrieval
Retrieval

  • Non-cued (recall)

  • Cued (recognition)

    • Strength of memory trace

    • Context

  • Encoding specificity – influence of the context of encoding


Forgetting
Forgetting

  • Failure to encode

  • Failure to retrieve

  • Interference

    • Retroactive (later learning interferes with previously learned material)

    • Proactive (previous learning interferes with later learning and is related to the amount of practice on the original task)



Concept maps
Concept maps

  • What’s a concept map?

  • A way to organize concept words and propositions.

  • How are they used?

  • Inspiration is a tool for creating concept maps – but you can do them by hand!


Create a concept map
Create a concept map

  • Neural network

  • Semantic/propositional network/concept map

  • Schema

  • Scripts

  • Dual-encoding models


Long term memory1
Long-term memory

Conditional

Procedural

Declarative

Episodic

(personal experience)

Semantic

(general knowledge)

?


Dual code models
Dual code models

  • Visual/verbal – 2 systems of memory representation

  • Paivio

  • NOTE: Working memory

    • Baddley model - Phonological and visual loop


Building blocks of cognition
Building blocks of cognition

  • Concepts

  • Propositions

Note: Hand out cards


Concepts

It’s a “thing” that “we” have classified.

Classified by

Rule

Prototype

Probability

Examples

Apple

Red

Concepts


Propositions
Propositions

  • Smallest unit of meaning that can stand as a separate assertion.

  • Judge as true or false

  • Relationship between two concepts.

    • Apples are red.

    • Apples are green.

    • Green apples are sour.


What do the blocks build

Declarative

Semantic Networks

Neural Networks

Schema

Procedural

Productions

Scripts

What do the blocks build?

What are they and what do they “look” like????


Network models
Network models

  • Semantic/Propositional networks

  • Nodes have meaning

  • Spreading activation

  • May show hierarchical relationships

  • Concept maps

  • Learning – building the network




Ausubel s model
Ausubel’s model

  • Rote versus Meaningful

  • Reception versus Discovery

  • Meaningful Reception Learning

  • Hierarchical, integrated body of knowledge.

  • Anchoring idea

  • Learning – gaining the cognitive structure


Ausubel s model1
Ausubel’s model

  • Processes of meaningful learning

    • Subsumption

      • Derivative (illustrate the concept – e.g., examples of different types of dogs)

      • Correlative (elaboration, extension, or modification of previously learned concept).

    • Superordinate – new inclusive proposition or concept under which established ideas are subsumed.

    • Combinatorial – new idea not related in a specific sense, but is generally relevant to the broad background information.


Neural networks
Neural networks

  • Connectionism (recall GCR)

  • Parallel distributed processing

  • Biologically inspired

  • Subsymbolic

    • The nodes don’t mean anything – connections are most important

    • Activation pattern carries the “meaning”

  • Learning via strengthening/weakening weights

  • Processes: Spreading activation


Neural networks1
Neural networks

Output layer

Hidden layers

Input layer


Neural networks learning
Neural networkslearning

Backward Error Propagation

Output Units

Hidden Units

Input Units

Forward network activation

From Luger & Stubblefield (1993, p. 524)


Productions
Productions

  • If-then rules

    • If the apple is red, then it is good for eating.

    • If the apple has a worm, then don’t eat it!

  • “Fire” automatically

  • Is ordinarily implicit memory (typically not conscious thought)

  • Production systems – developed via declarative, then procedural knowledge.


Production systems
Production systems

  • IF the engine is getting gas, and the engine will turn over,THEN the problem is spark plugs.

  • IF the engine does not turn over, and the lights do not come onTHEN the problem is battery or cables.

  • IF the engine does not turn over, and the light do come onTHEN the problem is the starter motor.

From Luger & Stubblefield (1993)


Act r
ACT - R

  • Comprehensive network model of memory

  • Propositions (subject + predicate)

  • Declarative knowledge (initially – schemalike structures)

  • Procedural knowledge (later - productions)

  • Working memory – where declarative K. is processed.

  • Learning – gaining these propositions

  • Strengthening (frequently used, stored close)


Schema
Schema

  • Abstract descriptions of things/events

  • Data structure

  • Top-down processing – a means to use schema

  • Bottom-up processing – building/tweaking

  • Learning – development of a schema

    • Accretion

    • Tuning

    • Restructuring


Schema1
Schema

  • Initial research – reading schema

Who: Mom, daycare teacher . . .

Where: couch, on floor

When: bedtime, circle time

Actions: hold book, turn pages . . .

Props: books


Scripts
Scripts

  • Experientially oriented (episodic memories initially)

  • Utilizes schema

  • Based in Artificial intelligence

  • Use scripts to understand situations through social contact

  • Used with typical/logical/routine behavior


Scripts1
Scripts

  • Situational understanding

Where: doctor office

Actors: patients, doctors, nurses . . .

How to: sit on exam table . . .

Props: medical equipment . . .

Scene: waiting room . . .


Mental models
Mental models

  • Mental, built on the fly

  • Humans represent the world they are interacting with through mental models.

  • Are schemata +

    • Represent knowledge and

    • Include perceptions about task demands and task performances.

  • Used to direct behavior

  • Tend to be incomplete

  • Have little control over them

  • Unstable, change over time


Mental models1
Mental models

  • “In order to understand a real-world phenomenon, a person has to hold what Johnson-Laird (1983) describes as a working model of the phenomenon in his or her mind. Mental models are not imitations of real-world phenomena, they are simpler.”

  • “A mental model which explains all aspects of the phenomenon that a person interacts with is an appropriate one. In order to provide explanation, it has to have a similar structure to the phenomenon it represents; it is this similarity in structure which enables the holder of the model to make mental inferences about the phenomenon which hold true in the real world.”

  • “A structural analogy of the world” <http://www.cs.ucl.ac.uk/staff/a.sasse/thesis/chapter03.html>


Mental models2
Mental models

  • How do you know what a learner’s mental model is?

    • Observe them

    • Ask them for an explanation

    • Ask them to make predictions

    • Ask them to teach another student


Instruction
Instruction

  • Activate prior knowledge

  • Advance organizers (Ausubel)

  • Comparative organizers and elaboration

  • Conceptual/Mental models (often teacher created)

    • Learnable

    • Functional

    • Usable

  • Other strategies (for learner and instructor)?





Expertise
Expertise

  • Consider your concept maps

  • Novice and Experts

    • Experts excel mainly in their domain

    • Have superior short-term memory for material in their domain – why is this, given that their memory capacity does not change? Perceive large meaningful patterns in their domains

    • Are fast – and generally solve problems with less errors than novices.

    • Spend more time analyzing the problem qualitatively

    • See and represent problems in their domain in a deeper way.

    • Have strong self-monitoring skills.


Experts novices
Experts/Novices

  • Have been lots of expert-novice comparisons.

    • Teachers – have different understandings of viewed classroom situations. Would focus on different thing (expert – both visual and verbal, whereas novice mainly visual). Experts more likely explain than just describe. Planned much more for long term action, and much of the planning was done in the context of teaching. Novices had less extensive teaching schemata. Planning took much more time for novices. Expert teachers could improvise.



Definition
Definition

  • May mean different things to different people.

  • “One’s awareness of thinking and the self-regulatory behavior” that accompanies this awareness” (Driscoll, p. 107).

  • In a nut shell, knowing what you know, knowing when you know, and knowing what you need to know.


Elements processes
Elements/Processes

  • “The executive” in many theories of memory.

  • Predicting, checking, monitoring, reality testing, coordination and control of deliberate attempts to study, learn, or solve problems

    • Use of study time

    • Estimating readiness for test

  • MC enhancing processes can be taught (when appropriate depending on age of learner)


Metacognitive ability depends on
Metacognitive ability depends on

  • Person variables

    • What is the role of age?

  • Task variables

    • Different instructional content

  • Strategy variables

    • Ways to encode, store, and retrieve information


Instruction for metacognition
Instruction for metacognition

  • Limitations of standard instructional practices

    • Emphasis on direct instruction

    • Lack of on-line diagnosis

    • Basic skills before understanding

      • E.g., Overemphasis on decoding results in lack of comprehension skills

    • Emphasis on subskills

      • Skills practiced in isolation


Instruction for metacognition1
Instruction for metacognition

  • Absence of explicit strategy instruction

  • Differential treatment effect

    • Cumulated and more pronounced for weaker students

  • Self-regulation


Reciprocal teaching
Reciprocal teaching

  • Form of guided cooperative learning

  • Passing of responsibility to students through a well-defined process

  • Process elements

    • Predicting – hypothesize what the author will say next in the text.

    • Question generating – identify the kind of things that make for a good question

    • Summarizing – integrate information

    • Clarifying – Clarify unclear vocabulary, referent words, and complicated concepts.


Reciprocal teaching1
Reciprocal teaching

  • Teacher’s role

    • Explain the strategies the students will be using, why they are learning them, and where they will be able to use them (helpful situations), and how they will learn the strategies.

    • Then give instruction on the four strategies (only one day on these two points)

    • Model the strategies

    • Use guided practice in which more responsibility is given for the students to be the teacher.

    • Offer praise

    • Use teacher judgment to determine when more modeling and instruction is needed.


ad