organise.exclusions.fix_durations: Exclude very brief and very long fixations.

In eyeTrackR: Organising and Analysing Eye-Tracking Data

Description

Exclude very brief and very long fixations.

Usage

organise.exclusions.fix_durations(fixreport_df, min = 60, max = 1200)

Arguments

fixreport_df	Fixation report.
min	Minimum duration of fixations.
max	Maximum duration of fixations.

Value

A data.table detailing how many trials were removed from each session, plus a data.table with the cleaned fixation report.

Examples

data(fixationreport)
data(messagereport)

# REPLACE SPACES IN MESSAGES
messagereport <- organise.message.replace_spaces(messagereport)

# TAKE A LOOK
print(organise.message.descriptives(messagereport))

# MARKUP
fixationreport <- organise.message.markup(message_df=messagereport, 
fixreport_df = fixationreport, message="DISPLAY_START")

fixationreport <- organise.message.markup(message_df=messagereport, 
fixreport_df = fixationreport, message="DISPLAY_CHANGE")

# NOW DO ACCURACY AND RT MARKUP
fixationreport <- organise.responses.markup(fixationreport, "CORRECT_RESPONSE")

# NOW MARK UP FIXATION CONTINGENCIES
fixationreport<-organise.message.fix_contingencies(fixationreport, 
list("DISPLAY_START", "DISPLAY_CHANGE", "RESPONSE_TIME"))

# SET UP TRUE RT
fixationreport[,TRUE_RT:=RESPONSE_TIME-DISPLAY_START,]

behaviouralData <- analyse.behavioural.data(fixationreport,
      aggregation_column_list = list('TRIALTYPE_TEXT'))

# RANDOM TRIAL TO CHECK THINGS OUT
print(organise.checks.random_trial(fixationreport))

# FIX CONTINGENCIES
print(organise.contingencies.descriptives(fixationreport))

# REMOVE MISSING EVENTS - HERE, TRIALS WHICH LACKED A RESPONSE
messageRemovals <- organise.message.removals(fixreport_df=fixationreport, 
    required_message_list=list("DISPLAY_CHANGE", "RESPONSE_TIME"))

# LOOK AT MESSAGE REMOVALS
print(messageRemovals[[1]])

# GRAB THE FIXATION REPORT WITH TRIALS REMOVED
fixMessagesRemoved <- messageRemovals[[2]]

# THIS SHOWS WE HAVE NO UNCLASSIFIED FIXATIONS, GOOD!
print(organise.contingencies.descriptives(fixMessagesRemoved))

# GET A BEHAVIOURAL DATASET FOR ANALYSES AND SAVING ETC.
behavDT<- organise.behavioural.base(fixreport_df = fixMessagesRemoved, 
   list( 'TRIALTYPE_TEXT'), response_period_start="DISPLAY_START")

# REMOVALS BASED ON FIXATION DURATIONS
durationRemovals <- organise.exclusions.fix_durations(fixreport_df=fixMessagesRemoved)

durationsRemoved <- durationRemovals[[1]]

# FINAL DATASET WHICH CAN BE ANALYSED 
finalDT <- durationRemovals [[2]]

eyeTrackR documentation built on April 14, 2020, 6:35 p.m.