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Introducing Linger

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items - experimental and filler sentences and questions. preferences ... Filler identifier # filler 1. Items can. Have several sentences (line by line) ... – PowerPoint PPT presentation

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Title: Introducing Linger


1
Introducing Linger
  • LabSyntax, 03/06/06
  • Florian Jaeger

2
Starting
  • Usually you start experiments through the linger
    executable
  • Choose an experiment
  • If there is no reason to overwrite data, accept
    the default subject-ID
  • Lingers documentation is excellent
  • http//tedlab.mit.edu/dr/Linger/readme.html

3
Several RT paradigms
  • Self paced vs. auto-pace X moving window vs.
    centered

4
Structure of experiments
  • Linger comes with an example experiment from
    which you can copy all files
  • items - experimental and filler sentences and
    questions
  • preferences
  • introduction - intro and practice trials
  • break - run if a rest break occurs
  • conclusion - end of the experiment

5
Item format
  • Item Identifier
  • Filler identifier
  • filler 1
  • Items can
  • Have several sentences (line by line)
  • Followed by one or more questions

6
Structuring an item (for RT studies)
  • Blocking word1_word2
  • Fixing word_at_
  • Breaking words part1part2 ? I had this wrong!
  • You can tag words (will show in result file)
    e.g.
  • I saw_at_VERB a_big_fat_turkey_at_OBJ the other
    daaay.
  • This allows you to use regions that differ in
    length between items!!!

7
Questions
  • Three types of question possible (any comb.)
  • Yes-No
  • ?TAG Blib Blub? Y
  • Multiple choice
  • !TAG Blib ___ Blub. a1 a_b2 a3 a_b2 a3
  • Fill-in the blank
  • TAG Blib ___ Blub

8
Question configuration
  • If true, multiple questions are randomly
    ordered
  • set QuestRand 0
  • This is the number of questions asked per item.
    If it is the null string, all are asked
  • set QuestNum
  • set QuestProb 1.0
  • set FillInBlankWidth 50
  • set MultiKeys A a B b C c D d

9
Lists Ordering
  • Automatic Latin-square design over all conditions
    (different experiments in the same file must have
    unique condition-IDs)
  • The number of lists will be the least common
    multiple of of conditions in each item.
  • Ordering is by default random (but thats your
    choice)

10
  • Self-centered reading prefs

11
Self-paced reading preferences (1)GENERAL
  • Should spaces within blocks be masked
  • set MaskJoins 0
  • Should spaces between blocks be masked
  • set MaskSpaces 0
  • The gap between mask dashes (in pixels)
  • set MaskGap 1
  • The number of blocks to show at once with a
    moving window
  • set WindowSize 1
  • set WindowStep 1

12
Self-paced reading preferences (2)KEYS
  • set GoKey space
  • set NoKey f
  • set YesKey j

13
Self-paced reading preferences (3)FEEDBACK
  • The delay (in msec) before presenting each
    sentence
  • set PreDelay 1000
  • set RightAnswer ""
  • set WrongAnswer "Oops. Wrong answer."
  • The time the feedback message stays on the
    screen
  • set FeedbackDelay 1500

14
Other features
  • Checking line breaks in items
  • Configuring font size, etc.
  • set TextFont "-family courier new -size -14
    -weight bold"
  • Collect difficulty rating

15
Difficulty rating
  • set CollectRatings 1
  • Presented after the sentence, but before
    questions.
  • The maximum value of the rating scale
  • set RatingChoices 7
  • The message presented along with ratings
  • set RatingMessage "How difficult was it to
    understand that sentence?"
  • set RatingEasy "Very Easy
  • set RatingHard "Very Hard"
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