Cognitive Daily

Archives for January, 2005

The bizarre world of color vision

How do we see things in color? How do we know objects stay the same color when the color of the light they reflect changes as the lighting changes? We see this effect most dramatically in the theater, where the stage lights cover every color of the rainbow, yet we still know the heroine is…

Troxler—and YOU!

Today’s reading delves deep into the visual system, so hold your breath and get ready to dive in. It’s “Sound-aided Recover from and Persistence Against Visual Filling-in” by Bhavin Sheth and Shinsuke Shimojo of Caltech (Vision Research, 2004). I even found a PDF link for this one. Ignaz Paul Vital Troxler (1780–1866) was a Swiss…

Today’s reading is “The Influence of Head Contour and Nose Angle on the Perception of Eye-Gaze Direction” by Stephen Langton, Helen Honeyman, and Emma Tessler, of University of Stirling (Perception and Psychophysics, 2004). We’re exceptionally good at telling where someone is looking, and we’re even better at determining whether they’re looking at us. We can…

Music and memory

Today’s reading is “Musical Soundtracks as a Schematic Influence on the Cognitive Processing of Filmed Events,” by Marilyn G. Boltz of Haverford College (Music Perception, Summer 2001). All film is illusion. The illusion of motion is created by a sequence of static frames. The illusion of a three-dimensional world is created by a two-dimensional photograph.…