BITTSy
  • Welcome to BITTSy
  • Goals and capabilities
    • Rationale
    • What can BITTSy do?
      • Headturn Preference Procedure
      • Preferential Looking Procedure
      • Visual Fixation Procedure (VFP)
      • Conditioned Headturn Procedure
  • BITTSy Basics
    • Overview
    • Protocol files
    • Trial timing structure
    • Coding infant behavior
    • Randomization of events
    • Output
  • Setup
    • System requirements and recommendations
    • Visual hardware
      • Displays
      • Lights
    • Audio hardware
    • Hardware installation guide
    • Download & setup
    • Creating stimuli for BITTSy
  • Creating protocols
    • Overview
    • Starting definitions: SIDES, LIGHTS, DISPLAYS, and AUDIO
    • Optional experiment settings
    • Tags
      • Tags referencing files
      • Groups
      • Dynamic tags
    • Phases, trials, and steps
    • Selection from a group & randomization
    • Action statements
    • Step terminating conditions
    • Loops
    • JUMP
    • Habituation
      • Setting habituation criteria
      • Meeting a criterion
      • Successful and unsuccessful trials
    • Putting it all together: Example protocols
      • Preferential looking example - word recognition
      • Preferential looking example - fast-mapping
      • Headturn preference paradigm example
      • Habituation example - familiarization to a category
      • Habituation example - word-object pairings
      • Conditioned Headturn - signal detection
  • Running protocols
    • The user interface
      • Advanced settings
    • Live coding
  • Data output
    • Detailed log files
    • The reporting module
    • Standard reports
    • Creating a custom report function
    • Using report files
  • Support
    • Version release notes
    • Troubleshooting
      • F.A.Q.
      • Setup issues documentation
        • Audio settings and channel crossover
        • Display ID numbers
        • Video or audio playback issues
    • Resources
    • Report an issue or request help
  • Citing BITTSy in publications
  • Acknowledgements
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  1. BITTSy Basics

Trial timing structure

PreviousProtocol filesNextCoding infant behavior

Last updated 4 years ago

Some infant testing procedures have a set time per trial (e.g., play this stimulus for 4 seconds, or play this sound file until it ends); for others, trial lengths depend on the child's looking behavior, requiring that the experimenter code behavior while the experiment is running. BITTSy allows individual stimuli to either , or to play until an event occurs (such as ), or for a of these (e.g., until a child looks away for X seconds, or until the file ends, whichever comes first). It also allows different trials to continue to occur for a , or is reached (e.g., in habituation-based studies, or in training studies). Thus, an experiment might be set up to continue presenting the stimulus within a given trial until the child looks away for 2 seconds, but then to continue playing trials until some cumulative amount of looking has occurred. All of these timing constraints can be set up as part of the protocol file.

set number of trials
until a certain threshold
play for a set amount of time
looking away for a certain amount of time
combination