The purpose of this experiment is to see how well we can tell male faces from female faces

Isabelle Bülthoff, Fiona Newell

Max-Planck Institute for Biological Cybernetics, Tübingen (Germany)

Nancy Frye

Texas Tech University

Dietmar Janetzko

University of Freiburg

Debbie Layton-Tholl

Miami Institute of Psychology

Michael Birnbaum

Cal State Fullerton

Le Tchen and Galen Lehman

William E. Snell, Jr.

Southeast Missouri State University

If you participate there is a real chance to win a prize between 100 and 300 dollar .

Laboratory of Social Psychology

University of Jena

Learn more about an illusion which will distort your perception of continuity--specifically, your perception of a straight line.

Internet Psychology Lab

University of Illinois

Look at a set of images, each contains 2 faces and point out the pair that has the same orientation

Max-Planck Institute for Biological Cybernetics Ulrike Siebeck

Tübingen (Germany)