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DONALD 2021

© 2021-2023 Maarten Meijer / AUAS

Introduction

Donald-2021 is named after Donald Norman, one of the fathers of Interaction Design and is a short-term memory tester to be used in various applications.

The learning goal is to experience using hardware to gather quantitative user data for optimising human-machine interaction and to determine a threshold for satisfactory performance for certain tasks.

Donald used to be a hardware device implemented as an Arduino, an AUAS electronic board, and a Raspberry Pi based device using 4 touch controls and a 12 color LED ring for visual feedback and display.

Donald in Hardware

In course year 2021 this was changed to a web application due to the corona pandemic. Using a mobile phone to simulate hardware allows easier at home prototyping for students.

Donald in software

If you just want to look at the interface part without server setup please see project donald_2021_local.

state machine

The memory tester is implemented using a state machine

The animation steps are as follows:

F0 IDLE

IDLE

F1 WARN

WARN

F2 SHOW

SHOW

F3 DECAY

DECAY

F4 COUNTDOWN

COUNTDOWN

F0 TIMEOUT

TIMEOUT

F0 SUCCESS

SUCCESS

F0 FAILURE

FAILURE

User Interaction - Timings

The User Interaction can be optimized by editing the timing parameters in a copy of the animations-x.js files.

Timing Param PARAMS-0 PARAMS-1 PARAMS-2 PARAMS-3 PARAMS-4
T0_IDLE 10 20 20 30 30
T1_WARN 60 60 120 120 180
T2_SHOWTEST 20 40 40 30 30
T3_DECAY 60 120 120 90 180
T4_COUNTDOWN 240 300 360 420 420

Timing is in 'frames' where we assume a frame rate of 60 fps. So a T4_COUNTDOWN of 240 means 240 / 60 = 4 seconds.

User Experience - Animations

The User Experience can be improved by changing the animation functions in a copy of the animations.js files.

An animation function is called every couple of frames and looks like this:

//
//  F3 decay is where your short senory and term memory slowly fades away
//
//
var decayColors = new Array(
  'blue', // named color
  'blue', // named color
  'blue', // named color
  'blue', // named color
  'blue', // named color
  'blue', // named color
  'black', // named color
  'black', // named color
  'black', // named color
  'black', // named color
  'black', // named color
  'black' // named color
  );

function showDecay() {
  if (frameCount % (T3_DECAY / 12) == 0) {
    showLeds(decayColors);
    decayColors.rotateRight(3);
  }
}

Result Data format

result sets retrieved with the form look like this:

T-00ZI	1	PARAMS-0	10	60	20	60	240	3,0	3,0	correct	139	0	412x766	2021-01-22 16:49:10.791342
T-00ZI	2	PARAMS-0	10	60	20	60	240	3,2,2	3,2,2	correct	100	0	412x766	2021-01-22 16:49:21.104859
T-00ZI	3	PARAMS-0	10	60	20	60	240	1,3,3,0	1,3,3,3	wrong	238	1	412x766	2021-01-22 16:49:34.688279
T-00ZI	4	PARAMS-0	10	60	20	60	240	1,3,2	1,3,3	wrong	80	1	412x766	2021-01-22 16:49:44.488560
T-00ZI	5	PARAMS-0	10	60	20	60	240	0,2	2	wrong	50	2	412x766	2021-01-22 16:49:52.845412
T-00ZI	6	PARAMS-0	10	60	20	60	240	2	1	wrong	39	1	412x766	2021-01-22 16:50:00.389465
T-00ZI	7	PARAMS-0	10	60	20	60	240	0,1	0,1	correct	67	0	412x766	2021-01-22 16:50:11.589195
T-00ZI	8	PARAMS-0	10	60	20	60	240	2,0,0	2,0,0	correct	100	0	412x766	2021-01-22 16:50:21.464358
T-00ZI	9	PARAMS-0	10	60	20	60	240	2,3,0,1	2,3,3	wrong	74	2	412x766	2021-01-22 16:50:31.689789
T-00ZI	10	PARAMS-0	10	60	20	60	240	3,3,0	3,3,0	correct	111	0	412x766	2021-01-22 16:50:41.561363
T-00ZI	11	PARAMS-0	10	60	20	60	240	3,0,1,0	3,0,0	wrong	105	2	412x766	2021-01-22 16:50:52.018799
T-00ZI	12	PARAMS-0	10	60	20	60	240	0,2,0	0,2,0	correct	108	0	412x766	2021-01-22 16:51:02.092671
T-00ZI	13	PARAMS-0	10	60	20	60	240	2,2,3,3	2,2,2	wrong	69	2	412x766	2021-01-22 16:51:11.945056
T-00ZI	14	PARAMS-0	10	60	20	60	240	0,1,2	0,1,1	wrong	80	1	412x766	2021-01-22 16:51:21.529807
T-00ZI	15	PARAMS-0	10	60	20	60	240	3,0	3,0	correct	78	0	412x766	2021-01-22 16:51:30.589170
T-00ZI	16	PARAMS-0	10	60	20	60	240	3,3,2	3,3,2	correct	129	0	412x766	2021-01-22 16:51:41.207195
T-00ZI	17	PARAMS-0	10	60	20	60	240	0,0,1,3	0,0,1,3	correct	197	0	412x766	2021-01-22 16:51:53.891014
T-00ZI	18	PARAMS-0	10	60	20	60	240	0,3,2,1,3	0,3,2,1,1	wrong	163	1	412x766	2021-01-22 16:52:06.367124
T-00ZI	19	PARAMS-0	10	60	20	60	240	3,2,3,2	3,2,3,3	wrong	120	1	412x766	2021-01-22 16:52:17.210425

This sequence is composed of:

  • testID
  • testCounter
  • test PARAMS set
  • T0_IDLE
  • T1_WARN
  • T2_SHOWTEST
  • T3_DECAY
  • T4_COUNTDOWN
  • requested sequence
  • recorded sequence
  • status correct | wrong | timeout
  • elapsed time in frames at 60 fps
  • remaining levels at which error or timeout occurred, the current level is the length of the requested sequence
  • windowHeight x windowWidth in pixels (see whether it's a phone)
  • date+time stamp

Microsoft Excel (Dutch) tips

Achieved and Requested Level

Extracting the requested and recorded levels can be done from requested and recorded sequence

  • =AFRONDEN.BOVEN(LENGTE($I1)/2;1)
  • =AFRONDEN.BOVEN(LENGTE($J1)/2;1)

Date + Time stamp into values

Extracting the date and time form the date+time stamp field can be done

  • =DATUMWAARDE(LINKS($O1;10)) and set the cell display to jjjj-mm-dd
  • =TIJDWAARDE(DEEL($O1;12;8)) and set the cell display to uu:mm:ss

Tools

Javascript developed using p5js with Processing. Web backend developed using python and Flask