TechnovationUser-centered Design

Week 3

Check-in: survey• Now you have survey results

from ~20 people

• Stand up as a team and share interesting results from your surveys

Agenda• Topics–Lists and Loops–User-Centered Design–Prototyping Lifecycle–Usability Testing

• Activities–Usability testing of competitor

apps–Paper prototyping

Lots of Circles• What tools did

you use?–Lists–Loops–Randomness

• How can you use these in your app?

Lists• For example: – to do list– list of students in the

class• In CS: –An ordered set of

values–Can get to individual

items if you know their number–Or we can pick a

random item

Lists• What Hacks have

used lists so far?–Lots of Circles–Crystal Ball–Quiz Me

• How can you use lists in your own app?

Loops• Tell the computer to do something many

times– For Example: draw 100 circles

• The code INSIDE the loop is repeated– For Example: the code to draw 1 circle

• There must be a condition for the loop to end– For Example: when 100 circles have

been drawn–Or when the user clicks the screen

Real-Life Loops• Can you think of some real-

life loops that you do?–Washing the Dishes•Definite Loop

–Using an umbrella• Indefinite Loop

Foreach dirty dish:Put in soapy waterScrubRinse

While still raining:use

umbrella

Definite Loops• You know when the loop is going to end

because there is a definite number of things to do

• Examples: – for (100 times) draw circle– foreach [dirty dish] wash it– foreach (class period): go to class– foreach (shopping list item): get it

• Foreach (member of a list): do something

Check-In: Q&A• Now let’s take a moment to

answer the tutorial questions in your group if you haven’t already

• Who can volunteer their answer for the first question?

What is User-Centered

Design?Designing things with the user in

mind.

You are not the user.

Think-Pair-Share: How to design with the user in mind?• Which remote looks easier to

use?

Source: Debra Lauterbach Keep it simple!

What happens when you do not design with the user in mind?• Crash dummies used to only be made in the shape

of adult men women and children were killed in car accidents

• Although this video is meant to be funny, it illustrates the fact that users will not always understand what you intended when you made your design

Source: http://www.autoexpress.co.uk/news/autoexpressnews/210049/crash_test_dummies.html

What is User Interface? • User Interface: link between the

person and the technology– Includes buttons, screen, keyboard,

mouse, etc, and the software on the screen User Interface:

Buttons

• User Interface Design: designing technology that makes sense to user – “intuitive” design

User Interface: Touch Screen, Software, Buttons

Prototyping Lifecycle

Have users test the

prototype and ask them questions

about their experience

with it. Incorporate

feedback.

Who is your user? What do they expect? What do they want?

What does it need to do? What is the goal?

Prototyping. Create samples. Source: Debra Lauterbach

Usability Testing

Think-Pair-Share: Usability Testing• Write down any notes after

watching the two Usability Testing videos

• Share your thoughts with the person next to you

Think-Pair-Share

Activity: Usability testing of competitor apps (15 minutes)• Investigate apps (aim for 5) that are similar in

function to yours or that have the same target customer– Search on App Store for iPhone and Google

Play for Android– What does it do well?– What could it do better?– Make notes about the features/interface• Color scheme, size/layout of buttons,

readability, etc. Record your ideas in pages 12 of the workbook

Fill in the chart on page 13 of the workbook, too

So you have competition… So what?• You can make a better product!• Plastic bags can cover you from the

rain…but aren’t you glad people invented raincoats?

Activity: Create a paper prototype (30 mins.)

Complete this

activity using phone template in pages 14 - 17 of the

workbook, or index cards

Task List• Finish your paper prototype and

bring it to class next week• Also, did you collect 20 survey

results?–You can continue to gather survey responses to make sure you understand the market for your app!