Copyright by the monkey in the pic disclaimer: if you find the content of this presentation unpleasant or insulting, please realize that you have a beef with reality, not me. Don't shoot the messenger.

Image: internetz

Image from the web

Img also from tha internetz 'Visual Illusions'

Dirty, lying brain!

Image: Metmuseum.org

Image: wikipedia

Image: internetz

Images: wikipedia

Cognitive Bias

“tendencies to think in certain ways that can lead to systematic deviations from a standard of rationality or good judgment”

Image: wikipedia

xkcd

Fomatic1 on flickr

Curse of knowledge Decoy effect Denomination effect Disposition Effect Distinction bias Dunning-Kruger effect Disposition Effect Ambiguity effect Duration neglect Distinction bias Anchoring or focalism Empathy gap Dunning-Kruger effect Attentional bias Endowment effect Duration neglect Automation bias Essentialism Empathy gap Availability heuristic Exaggerated expectation Endowment effect Availability cascade Experimenter's or expectation bias Essentialism Backfire effect Focusing effect Exaggerated expectation Bandwagon effect Forer effect or Barnum effect Experimenter's or expectation bias Base rate fallacy or Base rate neglect Framing effect Focusing effect Belief bias Frequency illusion Forer effect or Barnum effect Bias blind spot Functional fixedness Framing effect Cheerleader effect Gambler's fallacy Frequency illusion Choice-supportive bias Hard–easy effect Functional fixedness Clustering illusion Hindsight bias Gambler's fallacy Confirmation bias Hot-hand fallacy Hard–easy effect Congruence bias Hyperbolic discounting Hindsight bias Conjunction fallacy Identifiable victim effect Hot-hand fallacy Regressive bias IKEA effect Hyperbolic discounting Conservatism (Bayesian) Illusion of control Identifiable victim effect Contrast effect Illusion of validity IKEA effect Curse of knowledge Illusory correlation Illusion of control Decoy effect Impact bias Illusion of validity Denomination effect Information bias Illusory correlation Disposition Effect Insensitivity to sample size Impact bias Distinction bias Irrational escalation Information bias Dunning-Kruger effect Less-is-better effect Insensitivity to sample size Duration neglect Loss aversion Irrational escalation Empathy gap Risk compensation / Peltzman effect Less-is-better effect Endowment effect Selective perception Loss aversion Essentialism Semmelweis reflex Risk compensation / Peltzman effect Exaggerated expectation Social comparison bias Selective perception Experimenter's or expectation bias Social desirability bias Semmelweis reflex Focusing effect Status quo bias Social comparison bias Forer effect or Barnum effect Stereotyping Social desirability bias Framing effect Subadditivity effect Status quo bias Frequency illusion Subjective validation Stereotyping Functional fixedness Survivorship bias Subadditivity effect Gambler's fallacy Time-saving bias Subjective validation Hard–easy effect Unit bias Survivorship bias Hindsight bias Well travelled road effect Time-saving bias Hot-hand fallacy Zero-risk bias Unit bias Hyperbolic discounting Zero-sum heuristic Well travelled road effect Identifiable victim effect Actor–observer bias Zero-risk bias IKEA effect Defensive attribution hypothesis Zero-sum heuristic Illusion of control Actor–observer bias Illusion of validity Defensive attribution hypothesis Illusory correlation Egocentric bias Extrinsic incentives bias We are NOT good at logic

Curse of knowledge Decoy effect Denomination effect Disposition Effect Distinction bias Dunning-Kruger effect Disposition Effect Ambiguity effect Duration neglect Distinction bias Anchoring or focalism Empathy gap Dunning-Kruger effect Attentional bias Endowment effect Duration neglect Automation bias Essentialism Empathy gap Availability heuristic Exaggerated expectation Endowment effect Availability cascade Experimenter's or expectation bias Essentialism Backfire effect Focusing effect Exaggerated expectation Bandwagon effect Forer effect or Barnum effect Experimenter's or expectation bias Base rate fallacy or Base rate neglect Framing effect Focusing effect Belief bias Frequency illusion Forer effect or Barnum effect Bias blind spot Functional fixedness Framing effect Cheerleader effect Gambler's fallacy Frequency illusion Choice-supportive bias Hard–easy effect Functional fixedness Clustering illusion Hindsight bias Gambler's fallacy Confirmation bias Hot-hand fallacy Hard–easy effect Congruence bias Hyperbolic discounting Hindsight bias Conjunction fallacy Identifiable victim effect Hot-hand fallacy Regressive bias IKEA effect Hyperbolic discounting Conservatism (Bayesian) Illusion of control Identifiable victim effect Contrast effect Illusion of validity IKEA effect Curse of knowledge Illusory correlation Illusion of control Decoy effect Impact bias Illusion of validity Denomination effect Information bias Illusory correlation Disposition Effect Insensitivity to sample size Impact bias Distinction bias Irrational escalation Information bias Dunning-Kruger effect Less-is-better effect Insensitivity to sample size Duration neglect Loss aversion Irrational escalation Empathy gap Risk compensation / Peltzman effect Less-is-better effect Endowment effect Selective perception Loss aversion Essentialism Semmelweis reflex Risk compensation / Peltzman effect Exaggerated expectation Social comparison bias Selective perception Experimenter's or expectation bias Social desirability bias Semmelweis reflex Focusing effect Status quo bias Social comparison bias Forer effect or Barnum effect Stereotyping Social desirability bias Framing effect Subadditivity effect Status quo bias Frequency illusion Subjective validation Stereotyping Functional fixedness Survivorship bias Subadditivity effect Gambler's fallacy Time-saving bias Subjective validation Hard–easy effect Unit bias Survivorship bias Hindsight bias Well travelled road effect Time-saving bias Hot-hand fallacy Zero-risk bias Unit bias Hyperbolic discounting Zero-sum heuristic Well travelled road effect Identifiable victim effect Actor–observer bias Zero-risk bias IKEA effect Defensive attribution hypothesis Zero-sum heuristic Illusion of control Actor–observer bias Illusion of validity Defensive attribution hypothesis Illusory correlation Egocentric bias Extrinsic incentives bias

Now what?

Some you can compensate for. Others you can't.

Social Skills for Geeks

programming 2.5 pound of mushy gray matter in a dozen slides

Jos Poortvliet Community Manager xkcd.com rocks ;-) ownCloud Social Skills for Geeks

Agenda: ● Initiation protocol ● Ping ● Negotiation Initiation protocol 1

● Layer 1 PHY – Cleanup – Set variables ● SMTP with redundancy – Initial handshake & opening request Initiation protocol 1a

● Handling locale differences – Worse – Than – Åẞ ÇÏ & ÜTF8 ● Robustness principle

“Be conservative in what you send, be liberal in what you accept” Initiation Protocol 2

● Increasing page rank – Weather telemetry, GPS, history – No caching required ● Data transfer Initiation protocol 3

● Initialization issues ● Connection drops Ping 1

● Data storage

● 3 elements: – Timing – Markup – Speed ● Timing

– Quick

– Private

– Only if improvement is possible Ping 2

Markup – Code first – Testing results – Comments! – Specifics Ping 3

● Speed – Opening bits & bytes – Follow protocol – Proper payload – Observer response – No flooding Negotiation 1

● #FFA500 ● Maintenance Negotiation 2

● Proper diff ● Merge requests Negotiation 3

“speaking is silver, silence is golden” Polls & direct questions

“the amount of noise generated by a change is inversely proportional to its complexity” Process, Preparation & Isolation Questions?