reorganized statistics exercises

likelihood/lecture/likelihood-chapter.tex

@@ -18,6 +18,11 @@
 
 \section{TODO}
 \begin{itemize}
+\item Fitting psychometric functions:
+  Variable $x_i$, responses $r_i$ either 0 or 1.
+  $p(x_i, \theta)$ is Weibull or Boltzmann function.
+  Likelihood is $L = \prod p(x_i, \theta)^{r_i} (1-p(x_i, \theta))^{1-r_i}$.
+  Use fminsearch for fitting.
 \item GLM model fitting?
 \end{itemize}