Cumulative Quiz :Input and Interaction (Interaction Design Specialization) Answers 2026

Question 1

If you satisficed, you would:

❌ Find the perfect movie
✅ Find something that both of you are reasonably happy with in a short time
❌ Watch Hot Tub Time Machine 2
❌ Pick only what your friend liked

Question 2

Which Fitts’ law parameters are user-dependent? (Select all that apply)

❌ d
✅ b
❌ w
✅ a

Explanation:

• a (reaction/overhead time) and b (control rate) depend on the user/device.

Question 3

Comparing radial vs linear menus:

✅ The radial menu is faster because of both target size and distance.
❌ Faster only because of distance
❌ Linear faster because of target size
❌ Linear faster because of distance

Question 4

In Fitts’ law, variable b refers to:

❌ Y-axis intercept
✅ The speed/control rate of the user’s mouse
❌ Size of a button
❌ Spacing between center and button

Question 5

Which takes the shortest time to reach?

✅ Circle B takes the shortest time.
❌ Circle A
❌ B and C
❌ A and B

(Shortest distance with sufficient width.)

Question 6

Which change improves usability on touch (iPad)?

✅ All of the above

(Increase size, vertical arrangement, etc. Tooltips don’t help touch alone, but overall the best answer given is “All of the above”.)

Question 7

Row/column scanning keyboard — what must be true? (Select all that apply)

❌ Rows + columns ≥ number of keys
✅ Circuit closes for both a row and a column when a key is pressed
❌ Row for lowercase, column for uppercase
✅ Rows × columns ≥ number of keys

Question 8

Optical rotary encoder infers direction by:

❌ Accelerometer
❌ Doppler shift
✅ Sequence from two low-high hole patterns
❌ Centripetal force

Question 9

A faceted search interface:

❌ Provides snippet summaries
✅ Lets users filter results by distinct attributes
❌ Uses grid layout
❌ Shows depth perspective

Question 10

Showing variations aids creativity because (Select all that apply):

✅ Lets people see things they might not have thought of
✅ Leverages recognition over recall
✅ Can make selection faster
✅ Leverages our high-bandwidth visual system

Question 11

In Guiard’s kinematic-chain theory, the non-dominant hand (Select all that apply):

✅ Sets the frame
✅ Acts first
✅ Performs coarse motor movements
❌ Performs fine motor movements

🧾 SUMMARY TABLE