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Notes & Documentation:\
Probability gain versus information gain in category learning: eye movements\
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Ekaterina Stepanova & Kim Meier\
Cognitive Science Laboratory\
Simon Fraser University\
Notes created: Apr 25 2013\
Last updated: Apr 25 2013\
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The two .zip files here contain raw data from a categorization experiment. 5to1GazeLvl-2013-03-28.zip is a .csv file containing raw gaze information from Tobii x120 eye trackers. 5to1.zip contains three separate .csv files: one at the experiment level, one at the trial level and one at the fixation level. All four tables share a participant ID for indexing between levels.\
\
1. Experiment level table; column information\
Subject: the subject number\
Proportions: category frequency\
Location1Feature: The image pasted to location 1. Will have the relevance Location1Relevance.\
Location2Feature: The image pasted to location 2.\
Location3Feature: The image pasted to location 3.\
Location1Relevance: The logical value of the feature that appears in location 1 for that participant.\
Location2Relevance: The logical value of the feature that appears in location 2.\
Location3Relevance: Logical value of the feature in location 3.\
CatA1Button: joystick button for category A1\
CatA2Button: joystick button for category A2\
CatB1Button: joystick button for category B1\
CatB2Button: joystick button for category B2\
TotalEyeCorrection: \
RowID: unique row index\
CPyesnoEB:\
CP: When the participant reached the learning criterion\
LPa: Learning point for A categories\
LPb: Learning point for B categories\
LPA1/A2/B1/B2:\
LP1/2/3/4:\
OP:\
SubjectCondition: "equal" or "unequal" condition\
GazeDropper: If 0, <30% of trials are flagged for bad gaze (see triallvl in sshrc_if.zip)\
PostCP2m1:\
Phase2GazeAcceptable: Has a value of 1 if >75% of trials exceed 70% gaze collected.\
\
2. Trial level table; column information\
Subject: the subject number\
TrialID: trial number\
Feature1Value: 0 or 1 \
Feature2Value: 0 or 1\
Feature3Value: 0 or 1\
Response: participants' responses\
Correct Response: the category the stimulus belongs to\
ButtonResponse\
TrialAccuracy: 1 = correct\
GazeCollected: The proportion of gaze data for that trial that was correctly collected\
EyeCorrection:\
StartTime:\
StimulusRT: How long the participant looks at the stimulus before (s)he presses a button indicate that (s)he's ready to respond\
ResponseRT: How long the participant takes to make their category choice after they indicate that they're ready to response\
Fixation/Stimulus/Response/Feedback Onset: Based on internal equipment time: when the fixation/stimulus/response phase of the trial began.\
Phase2RT:\
ResponseIndex:\
RowID: Unique index\
ErrorType:\
ExcludeP2/P4:\
badPhase2: Exclude data for bad gaze while the stimulus is on screen\
badPhase4: Exclude data for bad gaze while the feedback is on screen\
phase4RT:\
pFixIrrelPh2: 1 if the participant fixated irrelevant information during the trial while the stimulus was on screen.\
\
3. Fixation level table; column information\
Start: a time point out of the eye tracker, indicates the time that the gaze point is collected\
Duration: The length of the fixation in milliseconds\
Subject: the subject number\
TrialID: Trial number\
TrialPhase: Phase 1 = fixation cross; Phase 2 = stimulus presentation; Phase 4 = feedback\
RowID: Unique index\
X: the x-coordinate of the fixation\
Y: the y-coordinate of the fixation\
Location: The area of interest in which the fixation falls\
FuncRelevance: The functional relevance of the area in which the fixation falls.\
\
4. Gaze level table; column information\
Subject: the subject number\
Session: 1; will always be a value of 1.\
ID: unique row index\
TETTime: A time point from the eye tracker marking when the gaze point is collected\
RTTime: A time point from the experiment software indicating when the gaze point is collected\
CursorX: the x-coordinate for the gaze point\
CursorY: the y-coordinate for the gaze point\
TimestampSec/MicroSec: Additional time markers\
XGazePosLeftEye/RightEye: x coordinate of the position of the gaze from each eye\
YGazePosLeftEye/RightEye: y coordinate of the position of the gaze from each eye\
XCameraPosLeftEye/RightEye:\
YCameraPosLeftEye/RightEye:\
DiameterPupilLeft/RightEye: diameter of a pupil of each eye\
DistanceLeftEye/RightEye: distance from an eye-tracker to each of the eyes\
ValidityLeftEye/RightEye:\
TrialID: trial number\
TrialPhase: Phase with the same definitions as in fixation level\
RowId: Unique index\
CorrectResponse: the correct category}