The Handheld Behavior Observation System (Howard-Blaze Observation System) or HBOS, is a behavior observation and data analysis system. The HBOS-A utilizes Windows Mobile touch-screen devices with data output in "xls" files; the HBOS-B then analyzes these interval-based "xls" data files. The HBOS system is free of charge to students, researchers, practitioners, and other professionals.

HBOS-A screenshots               HBOS-B screenshots


System requirements: Windows Mobile 5, 6, or 6.1 w/touch-screen
Download the HBOS-A mobile pocket PC program
  Download the HBOS-B Data Processing program

For questions relating to conditional probability assessment or observation methods please contact:

For questions regarding any technical issues or program errors please contact: