digraph test { rankdir = "LR" fontname = "Helvetica" node[fontname = "Helvetica"] edge[fontname = "Helvetica"] structure [label = "What\nis\nstructure?", shape=diamond] small [label = <

sumlog | (Fisher)
minimump | (Tippett)

>] large [label = <

sump | (Edgington)
maximump

>] equal [label = <

sumz | (Stouffer)
logitp

>] structure -> small [label = "Emphasise small p-values"] structure -> large [label = "Emphasise large p-values"] structure -> equal [label = "Emphasise p-values equally"] }