made change after an action (Visibility)

0

4

2.11

0.163

1.083

1.173

User model matches system image (Match)

0

4

1.91

0.186

1.235

1.526

Actions provided by the system match actions performed by users (Match)

0

4

1.93

0.164

1.087

1.181

Objects on the system match objects of the task (Match)

0

4

2.11

0.204

1.351

1.824

Less is more (Minimalist)

0

4

2.14

0.164

1.091

1.190

Simple is not equivalent to abstract (Minimalist)

0

4

2.11

0.176

1.166

1.359

Simple is efficient (Minimalist)

0

4

2.14

0.171

1.133

1.283

Progressive levels of detail (Minimalist)

0

4

2.25

0.203

1.349

1.820

Perceptual procedures (Memory)

0

4

2.20

0.194

1.286

1.655

Hierarchical structure (Memory)

0

4

2.30

0.183

1.212

1.469

Default values (Memory)

0

4

2.18

0.201

1.334

1.780

Concrete examples (Memory)

0

4

1.98

0.231

1.532

2.348

Generic rules and actions (Memory)

0

4

2.11

0.182

1.205

1.452

Information directly perceived, interpreted, and evaluated (Feedback)

0

4

2.14

0.183

1.212

1.469

Levels of feedback (Feedback)

0

4

2.32

0.168

1.116

1.245

Concrete and specific (Feedback)

0

4

2.02

0.144

0.952

0.906

Appropriate Response Time (Feedback)

0

4

2.23

0.152

1.008

1.017

Shortcuts for experienced users (Flexibility)

0

4

2.32

0.189

1.253

1.571

Shortcuts for frequently used operations. (Flexibility)

0

4

2.39

0.196

1.298

1.684

Skill acquisition through chunking (Flexibility)

0

4

2.02

0.191

1.267

1.604

Phrased in clear language (Message)

0

4

2.14

0.199

1.322

1.748

Precise, not vague or general (Message)

0

4

2.34

0.189

1.256

1.579

Constructive (Message)

0

4

2.02

0.167

1.110

1.232

Polite (Message)

0

4

2.00

0.166

1.100

1.209

Interfaces that make errors impossible (Error)

0

4

1.75

0.181

1.203

1.448

Avoid modes (Error)

0

4

1.57

0.193

1.283

1.646

Sound Experience (Error)

0

4

1.98

0.177

1.171

1.372

Execution error vs. evaluation error (Error)

0

4

1.86

0.180

1.193

1.423

Various types of slips and mistakes (Error)

0

4

1.80

0.183

1.212

1.469

Clear beginning, middle, and end (Closure)

0

4

2.05

0.184

1.219

1.486

Complete 7-stages of actions (Closure)

0

4

2.16

0.159

1.055

1.114

Clear feedback to indicate goals are achieved (Closure)

0

4

1.95

0.187

1.238

1.533

At different levels: a single action, a subtask, or a complete task. (Undo)

0

4

1.98

0.158

1.045

1.092

Multiple steps (Undo)

0

4

2.09

0.165

1.096

1.201