APPENDIX AVI212 Bedienungsanleitung Seite 181

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Experiment Analysis
174
© 2009 SensoMotoric Instruments GmbH Version 2.3
cognitive processes affect gaze duration (=dwell
time). The word properties that affect first fixation
duration include word frequency, morphological
complexity, metaphorical status, orthographic
properties, the degree of polysemy and other
linguistic computations.
First pass
duration
[ms]
Sum of fixation durations from the first entry into
an AOI until the eye leaves it in any direction
Note: First pass gaze duration is considered a
measure of linguistic processes slower than
lexical activation. Rayner (1998), reviewing
reading research using the fixation based gaze
duration measure, concludes that gaze duration
is indicative both of word frequency and of
comprehension processes integrating several
words. Gaze duration on a word thus contrasts to
first fixation duration, the other major reading
measure, which is used as an index on word
frequency. "Gaze duration" is a reading research
term. It is defined exactly as dwell time.
First return to
AOI
[ms]
Time of occurrence for the first re-entry into an
AOI
Second pass
duration
[ms]
Sum of fixation durations from the second entry
into an AOI until the eye leaves it in any direction
Note: Second pass gaze duration on a word is
assumed to reflect late effects (word integration
processes).
Ratio saccade /
next fixation
[%]
Saccade time divided by next fixation time
Ratio saccade /
prev fixation
[%]
Saccade time divided by previous fixation time
Is first skip
AOIs (words) that are not fixated during first pass
reading (although they may be fixated during
later regressions)
Note: Readers skip over high predictable words
more frequently than low predictable words
(Rayner & Well 1996).
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