http://www.stanleymilgram.com/milgram.php

http://news.bbc.co.uk/2/hi/europe/8573755.stm

http://blogs.lanacion.com.ar/blog-del-lector/reflexiones/la-percepcion-por-elias-galati/

http://psychology.about.com/od/sensationandperception/ss/gestaltlaws.htm

http://psychology.about.com/od/cognitivepsychology/a/left-brain-right-brain.htm

http://psychology.about.com/od/statesofconsciousness/a/SleepStages.htm

http://psychology.about.com/od/psychoanalytictheories/l/bl_psychosexual_quiz.htm

http://psychology.about.com/library/quiz/bl_researchmethods_quiz.htm

http://psychology.about.com/library/quiz/bl_psychologist_quiz.htm

http://psychology.about.com/library/quiz/bl_piaget_quiz.htm