There are multiple definitions:

1. spina iliaca anterior superior(Latin)

   • SIAI, SIPI, SIPS
   • Anatomy

2. Social Interaction Anxiety Scale(English)

   • developed in response to the need for instruments that assess various commonly feared social situations
   • GAD, PD, SAD, SPS
   • Anxiety/fear, Social aspects, Scoring systems/scales
   • https://doi.org…94427-6.00003-0