GOMS (HCI Final Project) Note: C was used for taps; M was used for scrolling, scanning, etc. GOMS times do not account for loading/lag between screens. 1.
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Show an expense of $20 at the ATM in the wallet 1.1. Tap button 1.2. Add expenses 1.2.1. Tap $ out button 1.2.2. Find item 1.2.3. Tap item 1.2.4. Tap Yes 1.3. GOMS 1.3.1. Expected: M + C*4 = 1.35 + 0.4*4 = 2.95 seconds 1.3.2. First Test Results 1.3.2.1. User 1: 14 sec 1.3.2.2. User 2: 30 sec (tapped to-do first) 1.3.3. Second Test Results 1.3.3.1. User 1: 6.66 seconds 1.3.3.2. User 2: 15.81 seconds (confusion about task) Check off “HCI Reading” in homework to-do list 2.1. Tap button 2.2. View list 2.2.1. Tap button 2.2.2. View 2.3. GOMS 2.3.1. Expected: C*3 + M = 0.4*3+1.35 = 2.55 seconds 2.3.2. First Test Results 2.3.2.1. User 1: 10.51 seconds 2.3.2.2. User 2: 11.28 seconds 2.3.3. Second Test Results 2.3.3.1. User 1: 5.54 seconds 2.3.3.2. User 2: 6.6 seconds View and save the tip titled “How to Save” 3.1. Tap button 3.2. Select and view a tip 3.2.1. Scan list 3.2.2. Tap desired tip 3.3. Save to My Tips 3.3.1. Tap Save icon 3.3.2. Tap “yes” 3.4. GOMS 3.4.1. Expected: M*2 + C*4 + M = 2.7 + 1.6 +1.35 = 5.65 seconds 3.4.2. First Test Results