Update README.md

Author: Amir-Ivry

README.md

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 # MAPSS-measures
 
 MAPSS (**Manifold-Aware Perceptual Source Separation**) provides evaluation code for two perceptually grounded, frame-level measures:  
-- **Perceptual Separation (PS)** – quantifies how well separated speech sources are perceived.  
-- **Perceptual Match (PM)** – quantifies how closely separated signals match reference speech.  
+- **Perceptual Separation (PS)** – quantifies how well separated speech sources are perceived. Range: 0-1, higher is better.
+- **Perceptual Match (PM)** – quantifies how closely separated signals match reference speech. Range: 0-1, higher is better.
 
 Both measures are implemented with diffusion maps over self-supervised embeddings, and include error bounds per frame and measure.