Computational Thinking - Virginia Tech

Computational Thinking - Virginia Tech

Computing Computational Thinking using Computational Thinking Patterns Authors: Kyu Han Koh et. al. Presented by : Ali Anwar ABOUT ME B.Sc. Electrical Engineering, University of Engineering and Technology Lahore, Pakistan M.Sc. Computer Engineering, University of Engineering and Technology Lahore, Pakistan PhD. Computer Science, Virginia Tech. I am from Lahore, Pakistan Technical Lead Software Engineer, Mentor Graphics/CodeSourcey Tools for embedded software development Open-source software development mainly GDB

Computational Thinking Lahore Fort 2 OVERVIEW Recognizing Computational Thinking Patterns Towards the Automatic Recognition of Computational Thinking for Adaptive Visual Language Learning Computing Creativity: Divergence in Computational Thinking End-user game design to learn Computational Thinking End-user game designing is a motivator to learn

computer science but do students learn computational thinking while designing a game? Programming games to creating science simulation using CT Computational Thinking Patterns Computational Thinking Pattern Quiz What other medium is more suitable and why? Computational Thinking 4 Why Games? Educational Characteristics of Game Design: 1. Enables students to transfer their skills to science simulations and/or mathematical models 2. Is based on concepts that are easily recognizable a and usable by both instructors and students

3. Is automatically measurable for evaluation and progress tracking purposes. Do you agree with the justification? Computational Thinking 5 What are Computational Thinking Patterns? Computational Thinking Patterns are abstracted programming patterns that are learned by students when they create games and can readily be used by students to model scientific phenomena. OR Computational Thinking Patterns are abstract programming patterns that enable gent interactions not only in games but also in science simulations.

Computational Thinking 6 Different Computational Thinking Patterns The games used to extract the patterns are following: 1. Frogger 2. Sokoban 3. Centipede 4. Space Invaders 5. Sims Computational Thinking 7

Frogger Computational Thinking 8 Sokoban Computational Thinking 9 Centipede Computational Thinking 10

Space Invaders Computational Thinking 11 Sims Computational Thinking 12 Computational Thinking Patterns Generation: To satisfy this pattern, an agent is required to create another agent; in real life, for example, raindrops emanate from clouds. Analogously, in predator/prey science simulations, animals breed to

create new animals. Conversely, the Absorb pattern is when one agent deletes another agent. Collision: The collision pattern occurs when two agents physically collide. In real life, a car crashing into another car is an example of a collision. In science simulations atoms can collide with other atoms to make new elements. Transportation: In the transportation pattern, one agent carries another agent. In real life a car transports a person. In science simulations red blood cells transport oxygen molecules to parts of the body. Computational Thinking 13 Computational Thinking Patterns Diffusion: Diffusion allows for the scent of an agent to be dispersed

around a level. In real life, the scent of freshly baked bread originating from the kitchen is present in other rooms. In a science simulation diffusion can be used to depict how heat is transferred from one side of a heated metal bar to the other side. Hill Climbing: An agent employing a hill-climbing algorithm looks at neighboring values of interest and moves towards the one with the largest value. These values could be, for example, the scent of another agent. In real life, mosquitoes hill climb the smell given off by humans. What other patterns can be added as far as game designing is concerned? Are these Programming Patters? Important Note: These CT patterns are associated with game designing not generic Computation Thinking Computational Thinking 14

Computational Thinking Pattern associated with each game Games Computational Thinking Patterns Generation, Absorption, Collision, Transportation Push, Pull Generation, Absorption, Collision, Push, Pull Generation, Absorption, Collision Diffusion, Hill Climbing Frogger Sokoban

Centipede Space Invaders Sims Why Sokoban does not have Transportation? Is agent not transporting boxes? Computational Thinking 15 Computational Thinking Pattern Graph The Computational Thinking Pattern Graph employs an approach similar to

Latent Semantic Analysis to create a graph that depicts the Computational Thinking Patterns used to program a given game. Computational Thinking Pattern graph. Depicts the Computational Thinking Patterns for a students implementation of Frogger as compared to the tutorials implementation Computational Thinking 16 Computational Thinking Pattern Quiz. Set of 8 questions, asked to identify the Computational

Thinking Pattern involve in the activity: 1. Collision of two people sledding down the hill in following picture when compared with Frogger: 2. 3. Marching band coming out of tunnel compared with Frogger. Collision of two soccer players. Computational Thinking 17 Computational Thinking Pattern Quiz.

4. Hot-dog eating contest compared with Pacman 5. Several football players chasing after a player with a football, Pacman 6. Video depicting one type of liquid being diffused in another type of liquid and participants were asked to state how this was similar to Pacman 7. Video that depicts marathon runners running towards the finish line, compared with a specific simulation 8. A written paragraph that described a predator/prey simulation, and participants were asked to talk about all the computational Thinking Patterns they would use to create this simulation. This simulation involves the Predator Prey relationship between the Fox and the Rabbit. The Foxes find and eat Rabbits when they are hungry. Otherwise, Foxes will breed with other Foxes to create new Foxes. The Rabbits also breed with other Rabbits to create new Rabbits. Finally Rabbits, when hungry, seek out and eat grass. Computational Thinking 18

Answers 1. 2. 3. 4. 5. 6. 7. 8. The people are being transported by the tubes and the announcer is hit (collision) like the frog and the truck. Generation of trucks, logs, turtles is similar to the tunnel generating people so to speak. There is a collision with two different team members just as the car collides with the frog. . .

PacMan eats pellets and they erase, just like the hot dogs erase when they are eaten. Both are seeking - the football players are seeking the player with the ball and the ghosts are seeking Pacman. This shows the diffusion of the dye which represents the scent we assigned to pacman. The runners are behaving like the ants after they have located some food. They are all heading in the same general direction as fast as they can. "Foxes and Rabbits use DIFFUSION/HILL CLIMBING in order to find their food sources, or you can have it be based on random movement. Foxes and rabbits will GENERATE new versions of themselves." Computational Thinking 19 Results Q1 (1)

Participants 1 Q2 (1) Q3 (1) Q4 (1) Q5 (1) Q6 (1) Q7 (1) Q8 (4) 0.929

.881 .952 .976 .951 0.846 3.14 Computational Thinking Pattern Quiz is a good first step towards evaluating if students recognize what they learn from game programming as well as validating the usefulness of Computational Thinking Patterns themselves. Is it?

Computational Thinking has occurred is based on whether students are able to transfer the knowledge they gained from game programming to science simulations? Use of Computational Thinking Patterns as the specific units of transfer between games and science simulations? Computational Thinking 20 Computational Thinking Pattern Spiral A collection of computational thinking patterns specifying common object interaction that can be found in a number of domains including game design, computational science and

robotics. Iterative approach to introduce and connect these concepts. For instance, random movement in game design is conceptually similar to Brownian movement in physics. Computational thinking patterns such as the collision of objects to highly advanced ones such as Maslows hierarchy of needs Implies increased connectivity among the three computer science areas of Is it not possible to learn transportation robotics, computational science and without learning push pull? game design. Computational Thinking

21 Automatic Semantic Evaluation Tool AgentSheets programs consist of user created agents, which are the game characters. All behaviors in AgentSheets are implemented using If/Then conditional statements. AgentSheets enables the use of 16 different conditions and 23 different actions, in

combination, to create behaviors for any given agent. With the 23 conditions and 16 actions, it is possible to represent each game as a vector of length 39, wherein each element of the vector represents how many of each individual conditions and actions are used to implement a given game. Using these vectors, any game created in AgentSheets can be compared to any other game through a high dimensional cosine calculation for similarity. Computational Thinking 22 Program Behavior Similarity Equation to calculate similarity:

Only advantage of this technique, automatability? The high dimensional cosine similarity comparison of games is robust to two games having the same proportion of rules, but having these rules in differing numbers. In such cases, a syntactic analysis would categorize the games as different. Computational Thinking 23 Similar Games Two similar Centipede Games with a similarity score of 0.89

Computational Thinking 24 Dissimilar Games Two Centipede Games with a low similarity score of 0.43 (Centipede A: Left, Centipede B: Right) Computational Thinking 25 Structure of Centipede A and B Centipede A Centipede B

Number of Agent Classes 8 19 Number of Depictions 13 35 Number of Methods

26 38 Number of Rules 107 129 Computational Thinking 26 Calculating Divergence to measure Creativity Is it an appropriate way to measure creativity?

Vector A = (0.525, 0.557, 0.432, 0.641, 0, 0.687, 0.721, 0, 0.197) Vector B = (0.373, 0.499, 0.679, 0.623, 0.096, 0.455, 0.51, 0, 0.106) divergence score of the given game = 0.15 The student-submitted game and the tutorial can be represented as nine dimensional vectors respectively (0.525, 0.557, 0.432, 0.641, 0, 0.687, 0.721, 0, 0.197) and (0.373, 0.499, 0.679, 0.623, 0.096, 0.455, 0.51, 0, 0.106). The difference of those two vectors is (0.152, 0.058, -0.247, 0.018, -0.096, 0.232, 0.211, 0, 0.091). The normalized (divided by the value of rooted n) length value of that vector is 0.15, and this is the value of divergence score of the given game. Computational Thinking 27 Game Dimensions and Creativity Agents The characters or agents in AgentSheets [14], make up the entire

game worksheet. Levels The game level sequence, as well as the difficulty of the levels can show a students creativity or divergence from the tutorial norm. Behavior The programming that students create, determines the behavior of characters, and is the most complex aspect of the game-design process. Computational Thinking 28 Three different classes Using Scalable

Game Design Arcade (SGDA) Scattered Divergence Calculation Graph: X-axis represents time by order of submission. Y-axis represents Divergence Score. Each dot means individual submission. 296 Frogger games are displayed in this graph. Computational Thinking 29 Divergence Calculation Score in Each Class Divergence Score Standard Deviation

Average In Class 2010 0.074 0.135 In Class 2011 0.057 0.186 Online 2011 0.011

0.314 We conjecture that not only is the revised tutorial a significant factor in the represented divergence between class conditions, but that the in-class/online condition comparison also appears to be a significant factor affecting the divergence calculation for at least two class conditions, effecting calculated creativity. Computational Thinking 30 DISCUSSION Is creativity measureable? If yes, what other approaches we can use to measure the creativity?

Can we automate Computational Thinking assessment? What other ideas do you have? Is it possible to use this approach in classroom? Computational Thinking 31 Thank You Computational Thinking 32

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