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AI in Digital Entertainment. Instructor: Rand Waltzman E-mail: [email protected] Phone: 790 6882 Room: 1430, Lindstedtsvägen 3 4 point course Periods I and II. Administrivia. There is no tenta for the course! There is a final paper.

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Ai in digital entertainment l.jpg
AI in Digital Entertainment

  • Instructor: Rand Waltzman

  • E-mail: [email protected]

  • Phone: 790 6882

  • Room: 1430, Lindstedtsvägen 3

  • 4 point course

  • Periods I and II


Administrivia l.jpg
Administrivia

  • There is notenta for the course!

  • There is a final paper.

    • Design and analysis of some type of digital based entertainment that uses some type of AI technology to enhance the participants experience.

  • Three homework assignments.

  • Final paper is required to pass the course.

  • Final grade will depend on how many successful (graded on a pass/fail basis) homework assignments you hand in on time.

    • 1 assignment  Final grade 3

    • 2 assignments  Final grade 4

    • 3 assignments  Final grade 5

  • Details of the paper and the homework assignments will be found on the course web site.


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“The holy grail of game design is to make a game where the challenges are never ending, the skills required are varied, and the difficulty curve is perfect and adjusts itself to exactly our skill level. Someone did this already, though, and its not always fun. It’s called life. Maybe you’ve played it?”


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“The problem with people isn’t that they work to undermine games and make them boring. That’s the natural course of events. The real problem with people is that

... even though our brains feed us drugs to keep us learning ...

... even though from earliest childhood we are trained to learn through play ...

... even though our brains send incredibly clear feedback that we should learn throughout our lives ...”

PEOPLE ARE LAZY


New possibilities l.jpg
New Possibilities undermine games and make them boring. That’s the natural course of events. The real problem with people is that

  • Application of AI techniques offer potential for new:

    • Media

    • Design field

    • Art form

  • Different dimensions to consider:

    • Cognitive psychology

    • Computer science

    • Environmental design

    • Storytelling


What is fun l.jpg
What is Fun? undermine games and make them boring. That’s the natural course of events. The real problem with people is that

  • A source of enjoyment.

  • All about making the brain feel good.

    • Release of endorphins into your system.

    • Same sorts of chemicals released by

      • Listening to music we resonate to.

      • Reading a great book.

      • Snorting cocaine.

      • Having an orgasm.

      • Eating chocolate.

  • Fun is the feedback the brain gives us when we are absorbing patterns for learning purposes.


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Subtle Approach undermine games and make them boring. That’s the natural course of events. The real problem with people is that

  • One of the subtlest releases of chemicals is at the moment of triumph when we

    • Learn something

    • Master a task

    • Our bodies way of rewarding us

  • This is one of the most important ways we find pleasure in games.

  • In games, learning is the drug.

  • Boredom is the opposite.

    • When the game stops teaching us, we feel bored.


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Experience vs. Data undermine games and make them boring. That’s the natural course of events. The real problem with people is that

  • New data is used to flesh out a pattern.

  • New experience might force a whole new system on the brain.

    • Potentially disruptive and not so much fun.

  • Games must continually navigate between

    • Deprivation vs. overload

    • Excessive chaos vs. excessive order

    • Silence vs. noise


How to make a boring game l.jpg
How to Make a Boring Game undermine games and make them boring. That’s the natural course of events. The real problem with people is that

  • Player figures out whole game in first 5 minutes.

  • Player might see that there are incredible number of possible permutations.

    • Require mastery of a ton of uninteresting details.

  • Player fails to see any pattern whatsoever.

  • Pacing of the revelation of variations in the pattern too slow.

    • Or too fast.

  • Player masters everything in the available patterns.


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A Little Cognitive Theory undermine games and make them boring. That’s the natural course of events. The real problem with people is that

  • The brain is made to fill in the blanks.

    • E.g., see a face in a bunch of cartoony lines and interpret subtle emotions from them.

    • Fantastic ability to make and apply assumptions.

  • The brain is good at cutting out the irrelevant.

    • Show somebody a movie with a lot of jugglers in it.

    • Tell them in advance to count all the jugglers.

    • They will probably miss the large pink gorilla in the background.

  • The brain notices a lot more than we think.

    • Put somebody in a hypnotic trance and ask them to describe something vs.

    • Asking them on the street!


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A Little More ... undermine games and make them boring. That’s the natural course of events. The real problem with people is that

  • The brain is actively hiding the real world from us.

    • Ask somebody to draw something.

    • More likely to get the generalized iconic version of the object ...

      • The one they keep in their head.

    • Rather than the actual object they have in front of them.

  • Seeing what is actually in front of us is hard.

    • Most of us never learn how to do it.


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Chunking undermine games and make them boring. That’s the natural course of events. The real problem with people is that

  • Compiling an action or set of actions into a routine.

    • Allows us to perform the action on autopilot.

    • Burning a recipe into the neurons.

  • Example: Describe how you get to work in the morning.

    • Get up

    • Stumble to the bathroom

    • Take a shower

    • Get dressed

    • Drive to work.

  • Easy enough, but ...


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Chunking undermine games and make them boring. That’s the natural course of events. The real problem with people is that

  • What if I ask you to describe one of these steps?

  • Example: Getting dressed.

    • Tops or bottoms first?

    • Socks in top or second drawer?

    • Which pant leg goes in first?

    • Which hand touches the button of your shirt first?

  • You could probably answer with enoughthought.

    • This operation has been chunked.

    • You would have to decompile and that would take time.


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More on Chunking ... undermine games and make them boring. That’s the natural course of events. The real problem with people is that

  • We usually run on chunked patterns.

    • Most of what we see is a chunked pattern.

    • We rarely look at the real world.

      • We usually recognize something chunked and leave it at that.

  • When something in a chunk does not behave as we expect we have problems.

    • A car starts moving sideways on a road instead of forward.

    • We no longer have a rapid response.

    • Unfortunately, conscious thought is very inefficient.

    • If you have to think about what you are doing, you are likely to screw it up.


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3 Levels of Thought undermine games and make them boring. That’s the natural course of events. The real problem with people is that

  • Conscious thought.

    • Logical

    • Works on a basically mathematical level.

    • Assigns values and makes lists.

    • Very slow!

  • Integrative, associative and intuitive.

  • Non-thinking thought.

    • You stick your hand in a fire.

    • You pull it out before you have time to think about it.


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Integrative Thought undermine games and make them boring. That’s the natural course of events. The real problem with people is that

  • Part of the brain that does the chunking.

  • Can’t normally access this part of the brain directly.

  • It is frequently wrong.

  • It is the source of common sense.

    • Often self-contradictory.

      • “look before you leap”

      • “he who hesitates is lost”

  • This is where approximations of reality are built.


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Appeal to Their Intelligence undermine games and make them boring. That’s the natural course of events. The real problem with people is thats

  • Some basic types of intelligence that entertainment can appealto:

    • Linguistic

    • Logical-Mathematical

    • Bodily-Kinesthetic

    • Spatial

    • Musical

    • Interpersonal

    • Intrapersonal

      • Internally directed

      • Self motivated


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Fun is Educational undermine games and make them boring. That’s the natural course of events. The real problem with people is that

  • Learn to calculate odds.

    • Prediction of events.

    • Qualitative probability.

  • Learn about power and status.

    • Not surprisingly of interest since we are basically hierarchical and strongly tribal primates.

  • Learn to examine environment or space around us.

    • Spatial relationships are critically important.

    • Classifying, collating and exercising power over the contents of space is crucial element of many games.

      • Using spatial relations as basis for predictive models.


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Fun is Educational ... undermine games and make them boring. That’s the natural course of events. The real problem with people is that

  • Learn to explore conceptual spaces.

    • Understanding rules is not enough.

    • To exercise power over a conceptual space we need to know how it reacts to change.

    • Exploring a possibility space is an excellent way to learn about it.

      • Memory plays an essential role.

      • E.g., recalling and managing very long and complex chains of information.

    • Provide tools for exploration. But, the trick is to strike a balance between

      • Teaching players to rely on tools to overcome their own limitations VS

      • Making people so dependent on tools that they can’t function without them.


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Fun is Educational ... undermine games and make them boring. That’s the natural course of events. The real problem with people is that

  • Learn basic skills:

    • Quick reaction time.

    • Tactical Awareness

    • Assessing the weakness of an opponent.

    • Judging when to strike.

    • Network building.

      • A very modern skill.

      • As opposed to basic cave-man skills.


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Good Entertainment undermine games and make them boring. That’s the natural course of events. The real problem with people is that

  • Thought provoking

  • Revelatory

    • Good portrayal of human condition

    • Provides insight

  • Contributes to betterment of society.

  • Forces us to reexamine assumptions.

  • Gives us different experiences each time we participate.

  • Allows each of us to approach it in his/her own way.

  • Forgives misinterpretations

    • Maybe even encourages them

  • Does not dictate.

  • Immerses and imposes a world view.


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From Game to Art undermine games and make them boring. That’s the natural course of events. The real problem with people is that

  • For games to reach art, the mechanics must be revelatory of the human condition.

    • Create games where the formal mechanics are about climbing a ladder of success.

      • E.g., mechanics simulate not only the projection of power, but concepts like duty, love, honor, responsibility.

    • Create games that are about the loneliness of being at the top.

    • Sample Titles

      • Hamlet: The Game

      • Working for the Man

      • Sim Ghandi

      • Against Racisim

      • Custody Battle


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Example undermine games and make them boring. That’s the natural course of events. The real problem with people is that

  • Your goal is the overall survival of your tribe.

  • You gain power to act based on how many people you control.

  • You gain power to heal yourself based on how many friends you have

  • Friends tend to fall away as you gain power.

  • So:

    • Being at the top and having no allies is a choice.

    • Being lower in the status hierarchy is also a choice

      • Perhaps more effective

  • Feedback:

    • Reward players for sacrificing themselves for the good of the tribe.

    • If they are captured during the game, they may no longer act directly but still score points based on the actions of the players they used to rule.

    • This could represent their legacy.


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What is Artificial Intelligence undermine games and make them boring. That’s the natural course of events. The real problem with people is that


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Can Machines Have Minds? undermine games and make them boring. That’s the natural course of events. The real problem with people is that


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Two Types of Goals undermine games and make them boring. That’s the natural course of events. The real problem with people is that


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AI and Computer Science undermine games and make them boring. That’s the natural course of events. The real problem with people is that


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Examples of AI Research undermine games and make them boring. That’s the natural course of events. The real problem with people is that


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Other AI Research Areas undermine games and make them boring. That’s the natural course of events. The real problem with people is that


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AI is undermine games and make them boring. That’s the natural course of events. The real problem with people is thatInherently Multi-Disciplinary


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Different Strokes for Different AI Folks undermine games and make them boring. That’s the natural course of events. The real problem with people is that


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AI Programming undermine games and make them boring. That’s the natural course of events. The real problem with people is that


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ACM Computing Classification undermine games and make them boring. That’s the natural course of events. The real problem with people is that

I.2.0 General

Cognitive simulation

Philosophical foundations

I.2.1 Applications and Expert Systems

Cartography

Games

Industrial automation

Law

Medicine and science

Natural language interfaces

Office automation

I.2.2 Automatic Programming

Automatic analysis of algorithms

Program modification

Program synthesis

Program transformation

Program verification


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ACM Computing Classification undermine games and make them boring. That’s the natural course of events. The real problem with people is that

  • I.2.3 Deduction and Theorem Proving

    • Answer/reason extraction

    • Deduction (e.g., natural, rule-based)

    • Inference engines     

    • Logic programming

    • Mathematical induction

    • Metatheory

    • Nonmonotonic reasoning and belief revision

    • Resolution

    • Uncertainty, ``fuzzy,'' and probabilistic reasoning


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ACM Computing Classification undermine games and make them boring. That’s the natural course of events. The real problem with people is that

  • I.2.4 Knowledge Representation Formalisms and Methods

    • Frames and scripts

    • Modal logic     

    • Predicate logic

    • Relation systems

    • Representation languages

    • Representations (procedural and rule-based)

    • Semantic networks

    • Temporal logic     

  • I.2.5 Programming Languages and Software

    • Expert system tools and techniques


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ACM Computing Classification undermine games and make them boring. That’s the natural course of events. The real problem with people is that

I.2.6 Learning

Analogies

Concept learning

Connectionism and neural nets

Induction

Knowledge acquisition

Language acquisition

Parameter learning


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ACM Computing Classification undermine games and make them boring. That’s the natural course of events. The real problem with people is that

I.2.7 Natural Language Processing

Discourse

Language generation

Language models

Language parsing and understanding

Machine translation

Speech recognition and synthesis

Text analysis


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ACM Computing Classification undermine games and make them boring. That’s the natural course of events. The real problem with people is that

  • I.2.8 Problem Solving, Control Methods, and Search

    • Backtracking

    • Control theory     

    • Dynamic programming

    • Graph and tree search strategies

    • Heuristic methods

    • Plan execution, formation, and generation

    • Scheduling     


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ACM Computing Classification undermine games and make them boring. That’s the natural course of events. The real problem with people is that

  • I.2.9 Robotics

    • Autonomous vehicles     

    • Commercial robots and applications     

    • Kinematics and dynamics     

    • Manipulators

    • Operator interfaces     

    • Propelling mechanisms

    • Sensors

    • Workcell organization and planning


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ACM Computing Classification undermine games and make them boring. That’s the natural course of events. The real problem with people is that

  • I.2.10 Vision and Scene Understanding

    • 3D/stereo scene analysis     

    • Architecture and control structures

    • Intensity, color, photometry, and thresholding

    • Modeling and recovery of physical attributes

    • Motion

    • Perceptual reasoning

    • Representations, data structures, and transforms

    • Shape

    • Texture

    • Video analysis     


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ACM Computing Classification undermine games and make them boring. That’s the natural course of events. The real problem with people is that

  • I.2.11 Distributed Artificial Intelligence

    • Coherence and coordination

    • Intelligent agents     

    • Languages and structures

    • Multiagent systems     


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Quality bars of the near-future undermine games and make them boring. That’s the natural course of events. The real problem with people is that

  • Procedurally generated content

  • “Emergent” behaviors, collisions

  • Believable characters

  • 100x physics

  • Portable avatars, persistent assets

  • Communities

  • Economies and money

  • Camera POV and LOD drives gameplay

  • Collaborative and dynamic intelligences


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AI could be a “killer app” feature of next gen undermine games and make them boring. That’s the natural course of events. The real problem with people is that

  • Characters:

    • Awareness

    • Memory

    • Complex motives, simple commands

    • 100x RAM allocation

  • Must be co-developed with animators!

    • Game AI must be acted out and seen

    • Expressions & gestures


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The Madden Test undermine games and make them boring. That’s the natural course of events. The real problem with people is that(of game AI)

  • 1985: “That’s not football!”

  • 1990: “I’d fire the coach!”

  • 1995: “What are those guys doing?”

  • 2000: “Rookie, you’re cut!”

  • 2005: “That’s the way I designed it!”


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What EA learned from John Madden undermine games and make them boring. That’s the natural course of events. The real problem with people is that

  • The Oakland Raiders playbook

    • Matchup strategy

    • 5 zones of field-position

  • One Knee Equals Two Feet

    • Player ratings

    • All-Madden team


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Madden Football Genesis undermine games and make them boring. That’s the natural course of events. The real problem with people is that23%


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Madden 97 Playstation undermine games and make them boring. That’s the natural course of events. The real problem with people is that54%


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Madden 2001 Playstation 2 undermine games and make them boring. That’s the natural course of events. The real problem with people is that63%


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Madden 2005 PS2 undermine games and make them boring. That’s the natural course of events. The real problem with people is that83%


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AI is undermine games and make them boring. That’s the natural course of events. The real problem with people is thatnot critical…yet

  • AI cited for 6/20 top PS2 games.

    • Metal Gear, NFL x 4, Soccer

  • AI cited for 3/10 top PC games.

    • Half Life x 2, Civilization


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When AI is applauded… undermine games and make them boring. That’s the natural course of events. The real problem with people is that

  • Appropriate npc behaviors

    • Dynamic adjustments

    • Satisfying mistakes

    • Coordinated attacks/retreats

  • Challenging opponent


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When AI is punished… undermine games and make them boring. That’s the natural course of events. The real problem with people is that

  • Too easy

    • No cover

  • Too dumb

    • Low awareness

    • “Deer in headlights”


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Observation #1 undermine games and make them boring. That’s the natural course of events. The real problem with people is that

Maximize the ratio of perceived intelligence to internal complexity.


Slide54 l.jpg

-Put a red pyramid on a green block. undermine games and make them boring. That’s the natural course of events. The real problem with people is that

>OK

-Pick up a blue block

>OK

SHRDLU - Winograd


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-Men are all alike. undermine games and make them boring. That’s the natural course of events. The real problem with people is that

>IN WHAT WAY?

-They're always bugging us about something or other.

>CAN YOU THINK OF A SPECIFIC EXAMPLE?

-Well, my boyfriend made me come here.

>YOUR BOYFRIEND MADE YOU COME HERE

-He says I'm depressed much of the time.

>I AM SORRY TO HEAR YOU ARE DEPRESSED

-It's true. I am unhappy

>DO YOU THINK COMING HERE WILL HELP YOU NOT TO BE UNHAPPY

Eliza - Weizenbaum


Slide56 l.jpg

-Men are all alike. undermine games and make them boring. That’s the natural course of events. The real problem with people is that

>IN WHAT WAY?

-They're always bugging us about something or other.

>CAN YOU THINK OF A SPECIFIC EXAMPLE?

-Well, my boyfriend made me come here.

>YOUR BOYFRIEND MADE YOU COME HERE

-He says I'm depressed much of the time.

>I AM SORRY TO HEAR YOU ARE DEPRESSED

-It's true. I am unhappy

>DO YOU THINK COMING HERE WILL HELP YOU NOT TO BE UNHAPPY

Eliza

SHRDLU


Slide57 l.jpg

SHRDLU undermine games and make them boring. That’s the natural course of events. The real problem with people is that

-Men are all alike.

>IN WHAT WAY?

-They're always bugging us about something or other.

>CAN YOU THINK OF A SPECIFIC EXAMPLE?

-Well, my boyfriend made me come here.

>YOUR BOYFRIEND MADE YOU COME HERE

-He says I'm depressed much of the time.

>I AM SORRY TO HEAR YOU ARE DEPRESSED

-It's true. I am unhappy

>DO YOU THINK COMING HERE WILL HELP YOU NOT TO BE UNHAPPY

Eliza

5

1

Perceived

Complexity

Actual

Complexity

1

5


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Observation #2 undermine games and make them boring. That’s the natural course of events. The real problem with people is that

The player will build an internal model of your system.

If you don’t help them build it, they’ll probably build the wrong one.


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Observation #3 undermine games and make them boring. That’s the natural course of events. The real problem with people is that

The flow of information about a system has a huge impact on the players perception of it’s intelligence.


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Observation #4 undermine games and make them boring. That’s the natural course of events. The real problem with people is that

From the players point of view there is a fine line between complex behavior and random behavior.

Visibility of causal chains usually makes the difference.


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Observation #5 undermine games and make them boring. That’s the natural course of events. The real problem with people is that

Mimicking human intelligence and maximizing the intelligence of an artificial system are 2 very different tasks.


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Observation #6 undermine games and make them boring. That’s the natural course of events. The real problem with people is that

There are many applications of AI in games that don’t involve Opponents, Avatars or even human-like intelligence.


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Meta AI undermine games and make them boring. That’s the natural course of events. The real problem with people is that

Peer AI

Sub AI


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Experience undermine games and make them boring. That’s the natural course of events. The real problem with people is that

Meta AI

Agents

Simulation

- Information Flow

- Pacing

- Simple Player Model

Peer AI

- Behavior

- Opponents/Avatars

- Complex Player Model

Sub AI

- Physics

- Tactile

- Intuitive Player Model


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Meta undermine games and make them boring. That’s the natural course of events. The real problem with people is that

Meta

Meta

Peer

Peer

Peer

Sub

Sub

Sub

The Sims

Spore

SimCity

Meta

Peer

Sub

Meta

Peer

Sub

Meta

Peer

Sub


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Observation #7 undermine games and make them boring. That’s the natural course of events. The real problem with people is that

Building a system that collects and reflects natural intelligence might be easier than replicating that intelligence.

45


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Observation #8 undermine games and make them boring. That’s the natural course of events. The real problem with people is that

Building a robust, internal model of the player can have huge potential value.



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Comedy computer’s model of the player

Romance

Horror

Mystery

Action

Computer

Understanding

Player Story

Adaptive

Mapping


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AI Research computer’s model of the player& IE Practice

  • IE has strong interest for systems that think, behave and interact like people.

    • Autonomous agents as supporting cast roles.

      • Virtual Worlds:

        • NPCs

      • Real Worlds

        • Companions

        • Collaborators

        • Opponents

  • Good news for AI research community.

    • No simple non-AI engineering solution.


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Some Daunting Challenges computer’s model of the player

  • Significant difference in the rate of development in AI and IE.

    • Progress in AI is slow – slower than ever.

    • IE experiencing explosive growth in both academia and industry.

  • Slow progress of AI will not keep pace with academic and industrial interests.

  • E.g., autonomous virtual animated characters.

    • Graphics researchers have provided animated character bodies approaching realism in visualization and animation.

    • Capacities for autonomous planning, control, conversation, and interaction are barely passable for most IE applications.


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Industry Can’t Wait computer’s model of the player

  • IE has had to rely on fully scripted interactions with human players to support complex interactions.

    • Exception: Basic Combat

  • One approach:

    • Have supporting cast members played by real humans.

    • In many ways, the rise of multiplayer and massively multiplayer IE forms has greatly reduced industry need for human-level AI.


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Social Preferences computer’s model of the player

  • Interacting with other humans in a distributed online environment might be preferable for many.

  • Result is increased interest in research in sociology and social psychology.

    • Social network analysis.

    • Personality profiling.

    • Perhaps more important than the fidelity of NPCs.


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Advice to AI Community computer’s model of the player

  • Be happy that some of the pressure is being relieved!

  • Broaden the scope of your expertise to include elements of the social sciences.


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Follow the Money! computer’s model of the player

  • IE Industry probably has no intention of funding basic AI research.

  • Traditional flow of software content:

    • Small developers 

    • Filtered through hardware manufacturers 

    • Large publishers.

  • None of these has incentive to support individual basic research projects.

    • Not for industry-research collaboration either.


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Follow the Money! computer’s model of the player

  • Developers probably have most to gain. But ..

    • Tight deadlines.

    • Slim profit margins.

    • Clash with academic models of high risk investigation.

  • Ideas more likely to cross the divide than code.

    • Expect to see increased interest in academic prototypes.

    • Implies importance of research funding for prototypes.

    • Where will this funding come from?

    • Wait (!!) – it is the cavalry to the rescue ...


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Necessity is the Mother of Invention computer’s model of the player

  • The military has been the most consistent source of AI research funding throughout its entire history.

  • Increasing reliance on automation and information technology superiority.

  • Steadily increasing interest in IE.

    • E.g., computer game technology for military

      • Simulations

      • Training

      • Recruitment

  • Existing comfort level with AI research has made it easier for military IE projects to have significant AI components.

  • And the happy news is ..

    • the military is heavily into the tradition of the research prototype!


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A Couple of Suggestions computer’s model of the player

  • AI should take advantage of the reduced need for human-level AI brought about by increased interest in multiplayer and massively multiplayer systems.

    • Use research-grade AI systems in the automation of supporting cast member roles that most humans would not find entertaining to play.

  • Computational linguistics has been a notable exception in the slow pace of AI research.

    • Fueled by empirical and statistical methods.

    • Few IE researchers have capitalized on the potential offered by current technology.


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A Final Word computer’s model of the player

  • If anything you have heard today has upset or discouraged you in any way, remember The Guide’s most important bit of advice:

    Don’t Panic!


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