kanizsa triangle gregory’s indirect theory (1974) top-down theory of perception

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  • Kanizsa triangle

  • Gregorys Indirect Theory (1974)Top-down theory of perception

  • Gregorys indirect theoryPerception process of construction

    Based on:Sensory dataPrevious knowledgeHypothesis about what is out there

  • Hypothesis testingNecker cube

  • Hypothesis testing: Rubins vase

  • Hypothesis testing

  • Previous knowledgeRotating masks: http://www.michaelbach.de/ot/fcs_hollow-face/index.html

  • Previous knowledge

  • Previous knowledgeWhat shape is this?

  • Muller-Lyer IllusionWhich one is longer?

  • Depth cues

  • Auditory ExpectationsLed Zeppelin Stairway to Heavenhttp://jeffmilner.com/backmasking.htm

    Lyrics: Oh heres to my sweet Satan. The one whose little path would make me sad, whose power is Satan. Hell give those with him 666; there was a little tool shed where he made us suffer, sad Satan.

  • Palmer (1975)

  • http://www.richardgregory.org/