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

Randomization of events

PreviousCoding infant behaviorNextOutput

Last updated 4 years ago

Events can be specified to occur in a set order. However, there are also a number of aspects that can be selected randomly. These include the side of occurrence for an event (left vs. right) and the particular stimulus from a set. can occur WITH or WITHOUT replacement - that is, BITTSy will keep track of which items it has already selected, and can avoid reusing items until all have already been selected (without replacement), or can just pick entirely randomly each time regardless of what has already been selected (with replacement). You can also on the number of times the same thing can be re-selected (e.g., pick a side randomly, but don't present to the same side more than X times in a row).

Stimuli can also be arranged in , with randomization occurring within sets. As an example, you could have pictures of animals which include cats and dogs, with multiple examples of each, and could tell BITTSy to select one of the two animal types randomly, then randomly order the presentations of all the different examples within that animal type before moving on to the other animal type.

Randomization
hierarchical sets
place limits