Confusing contours & pieces of glass Rob van Lier, Tessa C.J. de Wit, Arno Koning Presented by Nick van der Poel.

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Presentation transcript:

Confusing contours & pieces of glass Rob van Lier, Tessa C.J. de Wit, Arno Koning Presented by Nick van der Poel

Contents Introduction Experiment 1 Results 1 Experiment 2 Results 2 Conclusion & Discussion

Introduction Albert Michotte (1964) Kanisza square

Experiment 1 12 participants (students)

Experiment 1 12 participants (students) ‘Are the grey bars straight or indented?’ 256 trials per participant

Results 1

Experiment 2 17 participants (students) Same stimuli and procedure as in Exp 1 ‘What is the (possible) direction of shift?’

Results 2

Conclusion & Discussion Proportion incorrect judgements higher for the illusory surfaces Control group had many incorrect judgements Ramachandran’s checkboard illusion Attention and fixation