Introductory resources on bayesian modeling for cognitive sciences
+1 to Speldosa's suggestion. Griffiths and colleagues have written several primers on the use of Bayesian  models in cogsci. Many of them can be found on Griffiths' website under 'Foundations':

http://cocosci.berkeley.edu/publications.php?topic=Foundations

e.g.


  Perfors, A., Tenenbaum, J.B., Griffiths, T. L., &amp; Xu, F. (2011). A
  tutorial introduction to Bayesian models of cognitive development.
  Cognition, 120, 302-321.
  
  Griffiths, T. L., &amp; Yuille, A. (2008). A primer on probabilistic
  inference. In M. Oaksford and N. Chater (Eds.). The probabilistic
  mind: Prospects for rational models of cognition. Oxford: Oxford
  University Press.