presignal

1. not comparableBefore a signal.

   Signals to subjects to forget presignal items completely eliminated the proactive interference postsignal items would normally suffer from the presignal items.

   2000, Angela Vanessa Knox, Functional Magnetic Resonance Imaging of Inhibitory Processes During Directed Forgetting

   3 more examples

   Another experiment showed that presignal information about which of two frequencies was to be presented aids detection considerably, but such information does not entirely eliminate the decrement.

   1959, Massachusetts Institute of Technology. Research Laboratory of Electronics, Quarterly Progress Report - Volumes 52-53, page 199

   Mean shocks per minute for each of the four Ss during a 1-rnin presignal period, during successive 20sec of signal presentation, and during a 1-min postsignal period.

   1971, Psychonomic Science - Volume 25, page 149

   Therefore, a presignal area was determined based upon thresholds and/or indicator values, whether positive or negative. Once an indicator reaches its defined presignal area, it has been primed to await its firing signal.

   2006, Gregory Morris, Candlestick Charting Explained, →ISBN

plural presignals

1. A signal that occurs before some occurrence, as a warning or to trigger an automatic preparation.

   In this case, a presignal from the ATS could be interfaced with the elevator controls for that purpose.

   2011, Peter M. Curtis, Maintaining Mission Critical Systems in a 24/7 Environment, →ISBN

   2 more examples

   A presignal gets the moving cars back of the intersection off to the same flying start as the stopped lead vehicles. Von Stein has also used presignals in Dusseldorf and in other parts of Germany to create "time islands" for streetcars that must stop where there is no room for loading islands.

   1965, Robert Colborn, Modern Science and Technology, page 297

   A presignal ahead of the streetcar stop allows the streetcar to pass into the unloading zone only after all the nonrail-bound traffic has left.

   2012, Thomas R. Horton, Traffic Control: Theory and Instrumentation., →ISBN