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Observed IssueExample / RemarkNotes
Unclear what sliding doesWhen sliding occurs, the sim can be rather silent.
  • Is this a concern? Users may not have used it sufficiently to gain clarity
  • Are there magnet movement sounds when sliding occurs? (i.e. movement ticks).
Unclear what voltmeter doesA number of users did know what the voltmeter was for.
  • Is this a concern? Most users will use FL in context of a learning unit.
  • The voltmeter could be defined in the description instead (i.e. "Voltmeter - measures the positive / negative charge flowing through the circuit.")
  • The voltmeter is initially available - AP suggested it should be hidden by default
Unclear about use of field linesTurning on field lines has no immediate perceivable effect.
  • Currently the design only updates the "Magnetic Field Lines" description as the magnet moves.
  • Should the field strength be added to the text alert when magnet is released?


Notes:

  • how to help users replicate what they have done
  • how to help users compare results
  • how is it possible to track last major events?
  • Conveying voltage information:
    • put a description in the PDOM
    • somehow add description to the alert: use a similar 3-point description as lightbulb
      • "small / big / very big" "negative" "flux / voltage / ?"
      • "voltage big positive" "big positive volts" ?
      • "small positive change" > "small change"
      • add a description in the PDOM to help with cueing of text alert
        • voltmeter described as "measures voltage changes in circuit"
        • voltmeter text alert "small positive change" (initially) > "small change"

PDOM Example

Faraday's Law (h2, Scene Summary)

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At the centre of the play area (is a coil / are two coils) connected to a light bulb circuit. There is a also moveable bar magnet.

(question) merge circuit and field lines description to a "snap shot" summary.

(question) Idea: Last peak reading on voltmeter: x negative (x positive)

Grab the magnet to play.

Additional controls that change what is connected to the circuit, flip the bar magnet, and reset the sim. If needed, check out keyboard shortcuts under Sim Resources.

Play Area (h2)

Light Bulb Circuit (h3)

(question) Idea: Last peak reading on voltmeter: x negative (x positive) Merge w scene summary

In the circuit are a:

  • 4 loop coil
  • 2 loop coil (if attached)
  • light bulb
  • voltmeter (if attached)

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(Polarity according to whether or not it's flipped).

(Button Label: "Grab magnet")

(question) Insert instructions on cursor moves and sliding. Make sure to mention that they have to grab first "once grabbed".

Field Lines (h3) (if enabled)

(question) Merge w scene summary

One coilTwo coils different field strengthsTwo coils same field strengthsField strength values
(field strength) magnetic field at the 4 loop coil.(field strength) magnetic field at the 2 loop coil, (field strength) magnetic field at the 4 loop coil.(field strength) magnetic field at both 2 loop and 4 loop coil.

Strong

Moderate

Weak

Controls Area (h2)

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  • Label: "Grab magnet"
  • Aria description: "Select this to move the magnet."
  • Checkbox
    • Label: "Voltmeter"
    • Aria description: "Play with or without voltmeter connected to light bulb circuit"
  • Checkbox
    • Label: "Field Lines"
    • Aria description: "Hide or show magnetic field lines."
  • Circuit mode
    • Aria description: "Experiment with one or two coils."
    • Radio button group
      • (Radio) 1 coil
      • (Radio) 2 coils
  • Button
    • Label: "Flip magnet"
    • Aria description: "Flip North and South Poles"
  • Button
    • Label: "Reset All"

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  • Pressed tab.
    • Focus moved to magnet
    • Screen reader would announce button label ("Grab magnet") and associated aria-describedby text ("Select this to move the magnet").
  • Press enter.
    • Text alert: "Grabbed (location), W A S D keys move in 4 directions, press Space to release."
  • 1 2 3, or cursor keys pressed
    • Sonification sounds are heard
    • Bump Coil ("Bumped coil") and Bump Edge ("At edge of play area") alerts fired if occurred.
    • Changes to PDOM descriptions occur as interaction proceeds.
  • Press space.
    • Text alert: "(Magnet Release Text Alert)" according to the magnet location as depicted in diagram above.
    • Keyboard focus is on magnet button.
  • If Tab is pressed
    • Text alert: "(Magnet Release Text Alert)" according to the magnet location as depicted in diagram above.
    • Keyboard focus moves to next focusable item.

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  • Pressed tab.
    • Focus moved to magnet
    • Screen reader would announce button label ("Grab magnet") and associated aria-describedby text ("Select this to move the magnet").
  • Press enter.
    • Text alert: "Grabbed (location), try 1 2 3 keys slide different speeds left and right. Press Space to release."
  • 1 2 3, or cursor keys pressed
    • Sonification sounds are heard
    • Bump Coil ("Bumped coil") and Bump Edge ("At edge of play area") alerts fired if occurred.
    • Changes to PDOM descriptions occur as interaction proceeds.
  • Press space.
    • Text alert: "(Magnet Release Text Alert)" according to the magnet location as depicted in diagram above.
    • Keyboard focus is on magnet button.
  • If Tab is pressed
    • Text alert: "(Magnet Release Text Alert)" according to the magnet location as depicted in diagram above.
    • Keyboard focus moves to next focusable item.

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  • Pressed tab.
    • Focus moved to magnet
    • Screen reader would announce button label ("Grab magnet") and associated aria-describedby text ("Select this to move the magnet").
  • Press enter.
    • Text alert: "Grabbed (location), also see keyboard shortcuts under Sim Resources. Press Space to release."
  • 1 2 3, or cursor keys pressed
    • Sonification sounds are heard
    • Bump Coil ("Bumped coil") and Bump Edge ("At edge of play area") alerts fired if occurred.
    • Changes to PDOM descriptions occur as interaction proceeds.
  • Press space.
    • Text alert: "(Magnet Release Text Alert)" according to the magnet location as depicted in diagram above.
    • Keyboard focus is on magnet button.
  • If Tab is pressed
    • Text alert: "(Magnet Release Text Alert)" according to the magnet location as depicted in diagram above.
    • Keyboard focus moves to next focusable item.

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  • Pressed tab.
    • Focus moved to magnet
    • Screen reader would announce button label ("Grab magnet") and associated aria-describedby text ("Select this to move the magnet").
  • Press enter.
    • Text alert: "Grabbed (location). Press Space to release."
  • 1 2 3, or cursor keys pressed
    • Sonification sounds are heard
    • Bump Coil ("Bumped coil") and Bump Edge ("At edge of play area") alerts fired if occurred.
    • Changes to PDOM descriptions occur as interaction proceeds.
  • Press space.
    • Text alert: "(Magnet Release Text Alert)" according to the magnet location as depicted in diagram above.
    • Keyboard focus is on magnet button.
  • If Tab is pressed
    • Text alert: "(Magnet Release Text Alert)" according to the magnet location as depicted in diagram above.
    • Keyboard focus moves to next focusable item.

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