single item search on pdas: effects of font size & menu style by ketan babaria, sasha giacoppo,...
Post on 22-Dec-2015
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Single Item Search on PDAs: Effects of Font Size & Menu StyleBy Ketan Babaria, Sasha Giacoppo, Ugur Kuter
Desktop Vs PDA
Desktop13” or largerHigh resolution: 1280x1024 pix
PDA3” – 4” diagonallyLow resolution: 240x320 pix
Hypotheses
1) Detailed View searches take longer, with more errors, than List View searches
2) There is a critical point where font size decreases item selection time and increases error
Independent Variables
Font size Small font (10 pt) Medium font (12 pt) Large font (14)
Menu type Expanding Detailed (Scrolling)
Item distance 1/3 down the list 2/3 down the list
Task Design
3x2 interfaces (6 total) Detailed small, detailed large etc Expanding small, expanding large etc
For each interface users were given the name of the food item and then they had to search for that item.
Results
Significant reduction in performance fo expanding menusSmall font size had maximum errorsNo significant difference in errors using medium and large font sizeInteraction between distance, font size, and menu typeHigh correlation between task time and “screen clicks”