Slip jigs (9/8 jigs) are one of my favourite types of tunes to play, however many people find initially find it difficult to tell the difference between them and 6/8 jigs. The best solution for this is to listen to lots of great tracks to get more familiar with them.
The tricky thing is many albums don't specify if it's a slip or 6/8 (double) jig. Artists are also known to play around with the timings by adding an extra beat or taking one out. As fun as it is for those of us who can easily hear the change, this can make it quite confusing for someone trying to figure out whether it's a slip jig or not.
In an attempt to help you broaden your understanding of slip jigs I have created a Resource List to guide you along some great tracks.
In each part of the series I'll share with you tracks to practice along with and point out where the tune changes time signature.