How are the scores of GeneSplicer, MaxEntScan and SpliceRegion interpreted from VEP annotations?

I am using VEP from Ensembl to annotate my VCF files with the extra plugins of GeneSplicer, MaxEntScan and SpliceRegion. However, I don’t fully understand the output of these scores.

I know that they are used for splicing predictions on trained sets.

• What are the range of these values ?
• What does a high or low value mean ?
• What is the threshold ?

Can someone please explain them please ?