BIO150Y: Evolution of Cooperation Review

Review
Here is a summary of the learning objectives,
quiz questions and FAQs from the tutorial

### Introduction

Tutorial Tips

Theory

1. Social behaviour

2. Kin selection

3. Reciprocal altruism

4. Game theory

### Single-Move Game

Introduction

1. What is the Prisoner's Dilemma Game?

2. Cooperation and defection
What does it mean to defect?

3. The payoff matrix. How the payoff matrix is built
What is the payoff for mutual defection?

Results

1. How well did you do?
Your move and the outcome of your game with the computer was displayed.

2. How well did everyone else do?

3. On average which move does best?
The average payoff for C and for D was calculated from the class data.

Analysis

1. What is the logical move is in a single-move Prisoner's Dilemma Game?
What is the logical move?

2. What is the dilemma for each player in a single-move Prisoner's Dilemma Game?
What is the dilemma?

### Multiple-Moves Game

Introduction

1. What is a multiple-moves Prisoner's Dilemma Game?

2. Costs and Benefits Payoff Matrix Cost-benefit payoff matrix

Calculate the payoff

Results

1. How well did you do?
Your points total and that of the computer are displayed

2. How well did you do relative to everyone else?
Your points total is added to a frequency distribution for the class

Analysis

1. Suckers, Cheats and Tit For Tat Common strategies defined

2. Nice and nasty strategies
What is a nasty strategy?

3. Were you nice or nasty?

### Evolutionary Game

Introduction

1. What is an Evolutionary Prisoner's Dilemma Game?
Define evolution

2. How the evolutionary game works. Calculating relative success

3. Try these exercises.

2. Questions
What was the starting frequency of the ALLC strategy in the population?

What evidence, if any, was there that evolution occurred?

In general, what is the expected long-term outcome for a population composed of cheats and suckers?

Experiment 2: Can nice strategies beat out nasty strategies?

2. Questions

Which strategies were the most successful long-term?

Are the two best strategies nice or nasty?

Which characteristics make for a successful strategy?

Experiment 3: Can Tit for Tat invade a population of cheaters?

2. Questions

Can a small number of TFT invade a population of cheats (ALLD)?

If TFT never actually scores more points than ALLD in an encounter, why does it predominate in a mixed population?

### Does Tit for Tat exist in nature?

1. Predator inspection
2. Blood sharing
3. Trench warfare

### Bibliography

Some selected books and articles " You've now really finished! Please let us know what you liked (and disliked) about this tutorial."