ICWSM Resnick tutorial2012

Evidenced-Based Social Design of Online Communities

Robert E. KrautCarnegie Mellon University

Paul ResnickUniversity of Michigan

http://slidesha.re/ResnickICWSM12

Agenda

• Our approach & nature of design claims (10 minutes)• The challenge of contribution (90 min)

– Requests, goals & motivation (55 minutes)– Design challenge (15 minutes)– Break– Debrief (20 minutes)

• Starting a community (80 minutes)– Network externalities & getting to critical mass (45 minutes)– Design challenge (15 minutes)– Debrief (20 minutes)

Today’s goals

• Introduction to view of social design based on social science theory and empirical results

• Application to – Challenges of encouraging contribution to online groups– Challenges of starting a community from scratch

• Format: Lecture combined with break-out groups for design exercises

Instructors

• Paul Resnick– Professor, School of Information,

University of Michigan– Computer scientist by training

• Economics orientation– 2 years in industry at AT&T

• Robert Kraut– Herbert A. Simon Professor of HCI

at Carnegie Mellon– Social psychologist by training– 12 years in industry at Bell Labs

and Bellcore– Emphasis on social computing

Online communities face challenges typical of off-line groups

• Community start-up• Recruit, select and socialize members• Encourage commitment• Elicit contribution• Regulate behavior• Coordinate activity

But anonymity, weak ties, high turnover, & lack of institutionalization make challenges more daunting online

Evidence-based Social Design

• Mine the rich empirical and theoretical literatures in psychology and economics

• Develop design claims – Hypotheses about the effects of social design decisions

• Sometimes directly tested in the online context and sometimes only extensions of empirically tested theories developed in offline settings

Inspiration

Kurt Lewin

“There is nothing so practical as a good theory”

“If you want to understand something, try to change it”

The Roles of Theory and Evidence

• Identify Challenges• Generate Solution Ideas• Predict Consequences

Design Claims

• Our approach is to translate relevant social science theory and empirical research to design claims

• Alternative X helps/hinders achievement of goal Y under conditions Z

• E.g., – Coupling goals with specific deadlines leads to increases in

contributions as the deadlines approach– Group goals elicit contribution most among people who

identify with the group

Design Claims Differ from Pattern Languages

• Design pattern: a formal way of documenting a solution to a design problem in a particular field of expertise.

• May or may not document the reasons why a problem exists and why the solution is a good one

• Captures the common solutions, but not necessarily the effective ones

Design Levers

• Community structure• Content, tasks & activities• Selection, sorting & highlighting• External communication• Feedback & rewards• Roles, rules, policies and procedures• Access controls• Presentation and framing

Encouraging Contributions

Online Communities Face Challenges Typical of Off-line Groups

• Community start-up• Recruit, select and socialize members• Encourage commitment• Elicit contribution• Regulate behavior• Coordinate activity

But anonymity, weak ties, high turnover, & lack of institutionalization make challenges more daunting online

Reasons To Care

• Overall goal. Creating sufficient volume of contribution of the resources the group values to provide benefits to group members and others who rely upon the online community

• Different communities require different types of contribution– Social support forums: Conversational acts, empathy, offers of help– Recommender systems: Votes, opinions, comments– Facebook: Invites, accepts, wall posts, pictures – WoW guild: Time, particular skills– Threadless: T-shirt designs– OSS: Patches, code, translations, documentation– Wikipedia: New articles, facts, copy-editing, administration work,

cash (& recently, letters to congressmen)

Under Contribution Is Rampant

• Across many Internet domains, a small fraction of participants contribute the majority of material– Code in open source projects– Edits in Wikipedia– Illegal music in Gnutella– Answers in technical support groups

• Often leads to a power-law/Zipf curve distribution

• In many cases uneven contribution leads to an under supply of needed content. E.g., – Assessments and content in Wikipedia – Reviews of art movies in MovieLens

Wikipedia Stubs & Unassessed Articles• Many Wikipedia articles haven’t been assessed for

quality or importance• 58% of important ones are of low quality

Association for Psychological Science Wikipedia Initiative

APS/WI Reviewing Goal

• Subgoal: Get psychologists & grad students to review Wikipedia articles by adding comments to article talk pages describing problems with an article

• ~300 have signed up for the APSWPI, improving > 700 articles

• But fewer than 15 have reviewed• How you can apply any of the design claims

presented here to increase these reviews from APS members?

First attempt – Directed messages

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Second attempt

• Simplifying the task– Direct link to where the action is needed

• Highlighting “social identity” in the invitation message• Personalizing the message

– Specifying users’ expertise • Phrasing the task as “rating” instead of “reviewing”

Current Interface

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Naïve Task Analysis of Online Contribution

To get people to contribute needed content :

1. They need to understand what is wanted

2. They have to be competent to provide it

3. They have to be motivated to provide it

Naïve Task Analysis of Online Contribution

To get people to contribute needed content :

1. They need to understand what is wanted

2. They have to be competent to provide it

3. They have to be motivated to provide it

Requests, matching, and goal setting

theories of motivation• Extrinsic• Intrinsic• Effects of

social situations

Requests, Matching, and Goal Setting

Requests Focus Attention on Needed Contributions

• Make the list of needed contributions easily visible to increase the likelihood that the community will provide them

Identify Who Should Make The Contribution• Request help in a chat room• “Can you tell me how to see someone’s profile”

– 400 Chat rooms– DV=Time to response

• People are slower to respond when others are present• Diffusion of responsibility is reduced when people are called by name

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Email Request to Contribute to Movielens Quadruples Ratings

• In week after email reminder, contributes quadrupled, to ~ 20 ratings/person from ~5.4

• Is this sustainable?

Ask: Explicitly Asking for Needed Contributions Increases Likelihood of Getting Them

• News site with a “Leave a comment” form at the end of each article

• Fewer than 0.1% leave comments

• Experiment to estimate the value of explicit requests– No ask: “Leave a comment”

form at end of article– Immediate: Pop-up “Leave

a comment” when user opens article

– Delayed: Pop-up “Leave a comment” on closing article

Delayed

Immediate

No ask

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Comments by Type of Request

Number of comments

(Wash & Lampe, 2012)

Ask Someone Who Is Willing & Able to Help: Intelligent Task Routing (Cosley, 2007)

SuggestBotSuggestions

Suggestions Quadruple Editing Rates

Goal Setting Theory• Goals motivate effort, perseverance & performance

– Trigger for both self-reward (e.g., self-efficacy) & external reward (e.g., money, reputation, promotion)

• Goals are more effective if– Specific & challenging rather than easy goals or vague ‘do your

best’– Immediate, with feedback– People commit selves to the goals – because of importance,

incentives, self-esteem, …– People envision the specific circumstance & method they will

use to achieve them

• Design claim: Providing members with specific and highly challenging goals, whether self-set or system-suggested, increases contribution.

Experiment Showing that Goals Work:

• Send email to ~900 MovieLens subscribers– Gave non-specific, do your best goal or specific, numerical

contribution goals – Assigned goal to individual subscribers or a nominal group

of 10 subscribers (the “Explorers”)

Goal Experiment Results

• Results– Specific, challenging goals increased contribution– Group assignment increased contributions

In-game Goals in WoW

• In WoW players receive extra powers each 10-levels implicit goals setting

• Ducheneaut, N., et al.(2007). The life and death of online gaming communities: A look at guilds in world of warcraft. in SIGCHI conference on Human factors in computing systems. San Jose, California, USA.

Weekly minutes playing World of Warcraft, by level

Featured Status in Wikipedia as a Challenge

Wikipedia edits before and after reaching featured status

WikiProjects Use Collaborations of the Week (COTW) as Time-Delimited Goals

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A COTW announcement in a project page

An example template identifying an article as a COTW

Get designated to good status in a defined period (e.g., a week or a month)

Goal doubles contribution

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Pre-Collaboration Collaboration Post-Collaboration

Edits per person on the collaboration articles

Non self-identified members

Self-identified group members

Goal has much larger effect on group members

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Pre-Collaboration Collaboration Post-Collaboration

Edits per person on the collaboration articles

Non self-identified members

Self-identified group members

Goals and Identity

• Design claim: Goals have a more powerful effects when achieving them benefits a group the target identifies with

• Association for Psychological Science Wikipedia Initiative appeals to PhD psychologists with this technique

Design Claims Re: Goals

• Providing members with specific and highly challenging goals will increase their contributions.

• Goals have larger effects when people receive frequent feedback about their performance with respect to the goals.

• Externally imposed goals can be as effective as self-imposed ones, as long as the goals are important to community members

• Time-delimited challenges enhance the effects of goals

• Combining goals with appeals to social identity enhances their effects

Motivations for Contributing

What Motivates Contributors?• Intrinsic value of task (e.g., fun, curiosity,

challenge)• External personal value

– Reinforcement– Pay– Privilege

…• Social utility

– Reputation– Identification with the group– Reciprocity– Altruism

…

These are leverage points for interventions to increase motivation

Value-Expectancy Model Provides Leverage Points for Reducing Social Loafing

individual effort

individual performance

individual outcome

individual motivation

group performance

group outcome

individual utility

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Value-Expectancy Model Provides Leverage Points for Reducing Social Loafing

Liking for group membersIdentification with groupHistory of interaction with group

individual effort

individual performance

individual outcome

individual motivation

group performance

group outcome

individual utility

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Number of othersOwn competenceOwn unique skillsGroup’s incompetence

Frame request consistent with user’s values

Create incentives user valuesExtrinsicIntrinsic

Imagine you wanted labels for web images. How can you motivate people?

Extrinsic and Intrinsic Motivations

• Individual motivation influences behavior through external motivators (e.g., rewards, incentives, reputation) and intrinsic motivators (e.g., fun & curiosity)

Increase contributions by manipulating extrinsic incentives & intrinsic motivations

– Extrinsic motivators: Offer rewards as incentive (e.g., money, reputation, perks, grades)

• Larger rewards induce more contribution than smaller rewards. • Luxury goods create better incentives than money as rewards for

more difficult tasks. • Rewards of status, privileges, money, or prizes that are task-

contingent but not performance-contingent will lead to gaming by performing the tasks with low effort.

• People won't game the system for private verbal reward – Intrinsic motivators: Make the task fun or intrinsically interesting

Amazon’s Mechanical Turk

Typical Task: $.03

Financial Incentives on Threadless

Incentives vs. Reinforcements

• Incentives are promises given before the behavior to cause people to produce it

• Reinforcements are rewards given after a behavior that make it persist

Social Incentives on Amazon

Reinforcement: Barnstars

Design Claims Re: Incentives & Reinforcement

• Incentive Effects– People do more of the behaviors that they anticipate will be

rewarded. – Task non-contingent rewards will not create incentive to do more of

a task or exert more effort in doing it – Larger rewards induce more contribution than smaller rewards – Small gifts create more effective incentives than small payments

• Reinforcement effects– Rewards delivered in response to behaviors cause people to do

more of those behaviors – Rewards work better as reinforces if they are delivered right after

the desired behavior – Rewards generate more consistent performance over time if they

are unpredictable

Intrinsic Motivators

• Intrinsic motivation is the process of working to achieve the rewards that that come from carrying out an activity rather from as a result of the activity.

• Comes from the pleasure one gets from the task itself or from the sense of satisfaction in completing or working on a task.

Redesign the task to make it more fun or interesting

ESP Game To Label Images

• Example of playing the game• Taboo words

Truck

Red school bus

Red school bus

Red

How would you make a contribution task more fun?

What Makes a Contribution Fun?

Flow Criteria Principles of game design

Concentration Games should require concentration and the player should be able to concentrate on the game

Challenge Be sufficiently challenging and match the player’s skill level

Skills Support player skill development and mastery

Control Support players sense of control over their actions

Clear Goals Provide the player with clear goals at appropriate time

Feedback Provide appropriate feedback at appropriate times

Immersion Players should experience deep but effortless involvement in the game

Social Interaction Games should support and create opportunities for social interaction

Mapping flow to principles of game design (from Sweetser & Wyeth, 2005)

Lessons from game design

Support Opportunities for Social Interaction

Make tedious tasks fun via social interaction

Gamification• Applying game-design thinking to non-game

applications • Is the effect via fun (internal motivation) or

incentives (external motivations)?

Design Claims Re: Trade-offs Btw Intrinsic & Extrinsic Motivation

• Adding a reward to an already interesting task will cause people to be less interested in the task and to perform it less often.

• While tangible rewards reduce intrinsic motivations for interesting activities, verbal rewards enhance intrinsic motivation.

• Verbal rewards will not enhance intrinsic motivation and may undermine it while they are judged as controlling.

• Verbal rewards enhance intrinsic motivations most when they enhance the target’s perceptions of competence

Design Jam

• Groups of 4• Task

– Redesign of one thing of • request for review,• reviewing page on APS/WI site

– Sample Interface for reviewing page:http://hciresearch2.hcii.cs.cmu.edu/~rfarzan/wikipedia/tool/review/review.php?&cond=1 (also on next slide)

– Say which slides justify your proposal. – Mockup your proposal. – 15 minutes for Jam– Readout

• Show your mockup and narrate it: 1 minute!

Current Interface

Community Startup

A Startup Challenge

Externalities

• Alice's adoption or production decisions have direct or indirect effects on Bob's adoption or production decisions• Alice's decisions create costs and benefits external to her

• e.g., Size of telephone, email, and fax networks• e.g., Complementary products—hardware & software• e.g., Second hand smoke & other pollution

• Probability of a song appearing on Napster increased with the number of users, at a declining rate

Positive Externalities in Napster

• Measures of congestion in Napster increased with the number of users, at an increasing rate

Negative Externalities in Napster

Network Externalities in OLCs

• Negative externalities– Server congestion; competition for attention

• Positive externalities– People to interact with– Content they produce– Identity value

Implications of Positive Network Externalities

• Winner-take-all competition between networks• Need for critical mass

– minimum number of users that makes others want to join (or not quit)

Startup Phase Challenges

• Identifying a Niche• Defending the Niche• Getting to Critical Mass

Startup Phase Challenges

• Identifying a Niche• Defending the Niche• Getting to Critical Mass

Getting to Critical Mass

• Leveraging Early Members• Attracting Early Members

Getting to Critical Mass

• Leveraging Early Members• Attracting Early Members

Join Now or Wait?

• Early members especially important• Model provides insights into how to attract

• Join now if utility(join_now) > utility(wait)

utility (join now) = participation_benefitstage1

- startup_cost + success_probability * (participation_benefitstage2 + early_adopter_benefit)

utility(wait) = success_probability * (participation_benefitstage2 - startup_cost)

utility(join now) - utility(wait) = participation_benefitstage1 – startup_cost * (1 – success_probability) + early_adopter_benefit * success_probability

Implications: Where to Look for Solutions

• Increase immediate benefits

util(join now) - util(wait) =

participation_benefitstage1 – startup_cost * (1 – success_probability) + (early_adopter_benefit *

success_probability)

Implications: Where to Look for Solutions

• Increase immediate benefits• Reduce effort to join

util(join now) - util(wait) = participation_benefitstage1

– startup_cost * (1 – success_probability) + (early_adopter_benefit *

success_probability)

Implications: Where to Look for Solutions

• Increase immediate benefits• Reduce effort to join• Promise future benefits to

early adoptersutil(join now) - util(wait) =

participation_benefitstage1 – startup_cost * (1 – success_probability) + (early_adopter_benefit * success_probability)

Implications: Where to Look for Solutions

• Increase immediate benefits• Reduce effort to join• Promise future benefits to

early adopters• Set expectations: probability

of success

util(join now) - util(wait) = participation_benefitstage1 – startup_cost * (1 – success_probability) + (early_adopter_benefit *

success_probability)

Implications: Where to Look for Solutions

• Increase immediate benefits• Reduce effort to join• Promise future benefits to

early adopters• Set expectations: probability

of success• Conditional commitments

util(join now) - util(wait) = participation_benefitstage1

– startup_cost * (1 – success_probability) + (early_adopter_benefit *

success_probability)

Implications: Where to Look for Solutions

• Increase immediate benefits• Reduce effort to join• Promise future benefits to

early adopters• Set expectations: probability

of success• Conditional commitments• What's not worth focusing

on– Expectation setting: stage 2

value if successful

util(join now) - util(wait) = participation_benefitstage1 – startup_cost * (1 – success_probability) + (early_adopter_benefit *

success_probability)

Implications: Where to Look for Solutions

• Increase immediate benefits

• Reduce effort to join• Promise future benefits to

early adopters• Set expectations:

probability of success• Conditional commitments• What's not worth focusing

on– Expectation setting: stage 2

value if successful

util(join now) - util(wait) = participation_benefitstage1 – startup_cost * (1 – success_probability) + (early_adopter_benefit *

success_probability)

Increase Immediate Benefits

• DC25: Productivity, Entertainment or Commerce– E.g., Flickr offers picture storage and management,

services that are useful to the user even if nobody else is using Flickr.

• DC26: Professionaly generated content• DC27: Syndicated content• DC28: Professional staff contributions

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  Resnick, Paul, Janney, Adrienne, Buis, Lorriane R, and Caroline R Richardson, “Adding an online community to an Internet-mediated walking program. Part 2: Strategies for encouraging community participation”. Journal of Medical Internet Research. 2010. 12(4):e72.

Increase Immediate Benefits

• DC25: Productivity, Entertainment or Commerce• DC26: Professionally generated content• DC27: Syndicated content• DC28: Professional Staff contributions• DC30: (as a last resort)• DC31: Bots

Promise future benefits to early adopters

• DC 32: Future discounts to the early adopters– E.g., lower rates for life

• DC 35: Limited resources that tempt users to join early– E.g., status & recognition with being an early adopter– E.g., users sign up first to claim their username

• DC 36: Privileges– E.g., administrator status

• Identity rewards– "Won't you be proud that you helped this get off the ground?"

Expectation Setting: Presenting Success at Different Stages

• DC43: Small and slow growing– Display new members and content

• DC44: Small and fast growing– Display percentage growth

• DC45: Big– Display absolute numbers

Conditional Commitments

Summary

• The Challenges– Identifying a Niche– Defending the Niche– Getting to Critical Mass

• Leveraging Early Members• Attracting Early Members

Attracting Early Members

• Increase immediate benefits

• Reduce effort to join• Promise future benefits

to early adopters• Set expectations:

probability of success• Conditional

commitments• What's not worth focusing

on– Expectation setting: stage 2

value if successful

util(join now) - util(wait) = participation_benefitstage1 – startup_cost * (1 – success_probability) + (early_adopter_benefit *

success_probability)

Challenge: Make Design Suggestions for Getting a Specific Community to Critical Mass• SuccessfulOnlineCom

munities.com• Or a community that

someone in your group is trying to launch

• Increase immediate benefits

• Promise future benefits to early adopters

• Set expectations: probability of success

• Conditional commitments

A Startup Challenge

More information

Robert Kraut

robert.kraut@cmu.eduwww.cs.cmu.edu/~kraut

Paul Resnick

presnick@umich.edupresnick.people.si.umich.edu