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Notes on SRR tools

On Get Reading Measures tool

On getting reading measures from DataViewer

Thread is on Reading Measures.

Fixation Duration Measures

  1. Single Fixation Duration – The duration of a fixation on a target region, provided that region is fixated one time only, and that the one fixation does not occur after fixations on words further along in the text.

    Single Fixation Duration = IA_FIRST_FIXATION_DURATION, if IA_FIXATION_COUNT == 1 and IA_FIRST_FIX_PROGRESSIVE ==1

  2. First Fixation Duration – The duration of the first fixation on a target region, provided that the first fixation does not occur after fixations on words further along in the text.

    First Fixation Duration = IA_FIRST_FIXATION_DURATION , if IA_FIRST_FIX_PROGRESSIVE ==1

  3. Gaze Duration – The total duration of all fixations in a target region until the eyes fixate a region of text that is either progressive or regressive to the target region, provided that the first fixation on the target region does not occur after any fixations on words further along in the text.

    Note: This measure is typically referred to as “Gaze Duration” for one-word regions of text and “First-Pass Duration” for multi-word regions of text. For simplicity in this reading guide, this measure will be referred to as “Gaze Duration”, whether the region is one word in length or more than one word in length.

    Gaze Duration (a.k.a. First-Pass Duration) = IA_FIRST_RUN_DWELL_TIME, if IA_FIRST_FIX_PROGRESSIVE == 1

  4. Right-Bounded Duration – The total duration of all fixations in a target region until the eyes fixate a region of text that is progressive to the target region, provided that the first fixation on the target region does not occur after any fixations on words further along in the text.

    Note: This measure, as well as Regression Path Duration below, is sometimes referred to as Go-Past Duration. These two definitions of Go-Past Duration are distinguished here by calling one Right-Bounded Duration and the other Regression Path Duration.

    Right-Bounded Duration (a.k.a Go-Past Duration) = IA_SELECTIVE_REGRESSION_PATH_DURATION, if IA_FIRST_FIX_PROGRESSIVE == 1

  5. Regression Path Duration – The total duration of all fixations that occur from the first fixation on a target region until the target region is exited in a progressive manner (including fixations on the target region and fixations on words regressive to the target region), provided that the first fixation on the target region does not occur after any fixations on words further along in the text.

    Note: This measure, as well as Right-Bounded Duration above, is sometimes referred to as Go-Past Duration. These two definitions of Go-Past Duration are distinguished here by calling one Right-Bounded Duration and the other Regression Path Duration.

    Regression Path Duration (a.k.a. Go-Past Duration) = IA_REGRESSION_PATH_DURATION, if IA_FIRST_FIX_PROGRESSIVE==1

  6. Re-reading Duration – The difference between Regression Path Duration and Gaze Duration. This measure effectively includes only fixations of Regression Path Duration that are not on the target region (i.e., only fixations that are on words that are regressive relative to the target region).

    Re-reading Duration= [IA_REGRESSION_PATH_DURATION, if IA_FIRST_FIX_PROGRESSIVE == 1] – [IA_FIRST_RUN_DWELL_TIME, if IA_FIRST_FIX_PROGRESSIVE == 1]

  7. Total Duration – The total duration of all fixations in a target region.

    Total Duration = IA_DWELL_TIME

Fixation Ration Measures

  1. First-Pass Regression Ratio – The proportion of fixations following fixation on the target region that are regressive relative to the target region (and not progressive), provided that 1) words further along in the text have not yet been fixated (i.e., the region was not skipped during first-pass reading) and that 2) the target region has not already been fixated and exited.

    First-Pass Regression Ratio - check the frequency of IA_REGRESSION_OUT, if IA_FIRST_FIX_PROGRESSIVE==1

  2. First-Pass Fixation Ratio – The proportion of times that the target region is fixated before any progressive text is fixated (as opposed to times when the target region is skipped during first-pass reading)

    Note: [1 – (First-Pass Fixation Ratio)] is First-Pass Skipping Ratio.

    First-Pass Fixation Ratio - check the proportion of IA_SKIP and subtract it from 1

  3. First-Pass Multi-Fixation Ratio – The proportion of times that the target region is fixated more than one consecutive time before any other text that is progressive or regressive to the region is fixated, provided that the target region is fixated at least once before any material progressive to the region is fixated (i.e., provided that the target region is not skipped during first-pass reading).

    First-Pass Multi-Fixation Ratio - check the proportion of IA_FIRST_RUN_FIXATION_COUNT > 1, if IA_FIRST_FIX_PROGRESSIVE ==1

Another thread here

  • multiline text reading.
  • interest area segmentation by word or by phrase
  • associating interest area files with en-mass with an EDF file

Other pointers

  • Webinar on design and summarization of Vis World and Reading Exp. using EB and DV.
  • Thread by Gordils on importing interest area files into DV.
  • Another thread on importing interest areas into DV by Shvartsman.
  • Yet another thread on importing interest areas.
  • Thread on managing multiple interest area sets per trial.