Audience Response Polls
A Guide to Creating Memorable Presentations
September 22, 2025
Samantha Monty
Chair for Human-Computer Interaction, University of Würzburg

Table of Contents

About Polls

Include audience response polls in your Decker presentation to poll the audience in real-time. Decker will provide a QR code that viewers can scan on their mobile devices and cast their votes. Results appear in real time. You must be within the University network to use polls.

Use

  1. Type ppp to start presenter mode (a).
  2. Click QRCode to display the QR code (b).
  3. Viewers should scan the code to open the voting page (c).
  4. Click Poll to start and Stop to stop the poll.
  5. Optionally answer the question and click Solve to display answers.

img/poll1.png
(a) Poll in Presenter Mode

img/poll2.png
(b) Poll QRCode
img/poll3.png
(c) Voting Page

Setup

Add poll questions as YAML either as a separate file, or in code.

quest.yaml

Points: 5
LectureId: icg-about
TopicId: homogenous-coordinates
Answer:
  tag: MultipleChoice
  Choices:
    - Correct: true
      TheAnswer: A vector with $w=1$ represents a point.
    - Correct: true
      TheAnswer: A vector with $w=0$ represents a direction.
    - Correct: true
      TheAnswer: The value of $w$ does not change when an affine mapping is used.
    - Correct: false
      TheAnswer: A vector with $w=0$ represents a point.
    - Correct: false
      TheAnswer: A vector with $w=1$ represents a direction.
    - Correct: false
      TheAnswer: A vector with $w=0$ represents a normal.
    - Correct: false
      TheAnswer: A vector with $w=1$ represents a normal.
Title: Homogeneous coordinates
Difficulty: Easy
Comment: ""
Question: |
  When viewing a 3D vector in homogeneous coordinates, a 4th coordinate 
  $w$ is added. Which statements about the *homogenizing* of $w$ are true?

presentation-deck.md

![](./assets/quest.yaml){.question .poll}

Example

Type ppp to start presenter mode. Open the QRCode and scan with a mobile device, or click the link at the bottom of the code. Start the poll, vote and stop the poll. Type ppp to stop presenter mode.

Homogeneous coordinates

When viewing a 3D vector in homogeneous coordinates, a 4th coordinate \(w\) is added. Which statements about the homogenizing of \(w\) are true?

A

A vector with \(w=1\) represents a point.

A
0
B

A vector with \(w=0\) represents a direction.

B
0
C

The value of \(w\) does not change when an affine mapping is used.

C
0
D

A vector with \(w=0\) represents a point.

D
0
E

A vector with \(w=1\) represents a direction.

E
0
F

A vector with \(w=0\) represents a normal.

F
0
G

A vector with \(w=1\) represents a normal.

G
0
Punkte