LE3 - Eye Tracking

• Identification of center of the pupil by infrared

• Identification of reflection point ot infrared on the cornea

• alorithm calcuates on relation of these two points

Remote

• Infrared lamp and eye camera placed close to monitor

• no physical contact

• head movements possible

• high precision through technical progress

Tower Mount

• infrared lamp and eye camera placed in tower

• head movements not possible

• ideal for touchscreens, close distance

• more accurate than remote

Eye Tracking Glasses

• infrared lamp and eye camera worn on the head

• head movement freedom

• additional scene camera captures field of view

• static eye tracking

  • field of vision no change

  • simple data evaluation

• mobile eye tracking

  • field of vision may change

  • manual annotation of data necessary

emotional arousal. Pupil diameter increases when respondents processes emotionally enganging stimuli

changes in pupil response, increased averave fixation durations and faster saccades

• Its the feeling of ease of processing new information

• its a indicator of procressing flow and show how efficient a stimulus can be processed

• high frequency eye blink indicate a change in flow information

• driving: more concentrated fixations and smaller saccadic distances indicate higher fluency

• its still unclear how to measure perceptual fluency using eye tracking

• used to improve the usability of websites, search engines, e commerce shops

• research disciplines: Marketing and Information Systems

• Research question: Which visual factors influence the perceived usability