fleshed out readme

README.md

@@ -1,2 +1,34 @@
 # SDT
-Signal Detection methods for Mathemtica
+
+---
+
+### Signal Detection methods for Mathemtica.
+
+This package is designed for doing signal detection theory calculations, based on work from:
+
+* N. A. Macmillan & C. D. Creelman (1991). _Detection Theory: A User's Guide,_ Cambridge University Press.
+* Smith, J. E. Keith (1982). Simple Algorithms for M-Alternative Forced Choice, _P&P_.
+
+
+
+
+### Example use
+```
+<<SDT`
+
+(* {signal present, response} *)
+data = {{True, True}, {False, True} {False, False}, ... };
+hf = HitsAndFalseAlarms[data]
+    (* {29/45, 2/45} *)
+
+DPrime @@ hf //N
+    (* 2.07165 *)
+
+Criterion @@ hf //N
+    (* 0.665462 *)
+```
+
+There are other methods and options for specifying designs, etc. I'll add more to the `SDT.nb` file soon.
+
+### More
+For more weird stuff, visit [my lab at http://www.skidmore.edu/~flip](http://www.skidmore.edu/~flip).