Neck edge shaping question

I’m a fairly new knitter. I’m working on the Sweetheart Pullover for the Fall 2012 issue of Interweave Knits. I’m having trouble with the decreases for the neck edge. The instructions say “dec 1 st at neck edge every row.” There is a pretty chain detail at the top edge where you pick up for the ribbing. I’m having a terrible time duplicating this. Not sure which combo of stitches will have the right effect- for instance, on the left side (public) k2tog and (back) ssp? or k2tog and p2tog? or k2tog and s1p1psso? or some other combination?


P2tog looks like k2tog on the knit side; ssp is the back of ssk.