Mice (Mus musculus) do not perceive emergent gestalt

Area of Science:

• Comparative psychology
• Visual perception
• Animal cognition

Background:

• Humans and chimpanzees exhibit enhanced diagonal line orientation discrimination when presented with redundant visual contexts.
• This facilitation in primates is linked to the perception of emergent configurations or Gestalt principles.

Purpose of the Study:

• To investigate whether redundant visual contexts similarly facilitate diagonal-orientation discrimination in mice.
• To determine if mice perceive emergent Gestalt comparable to humans and chimpanzees.

Main Methods:

• Mice were subjected to three diagonal-orientation discrimination tasks: lines presented alone, with a facilitative context, and with a non-facilitative context.
• The facilitative context was previously shown to enhance performance in humans and chimpanzees.

Main Results:

• Mice did not show improved discrimination performance when presented with the redundant context that facilitated performance in primates.
• The identical context that induced emergent configurations in humans and chimpanzees had no facilitative effect on mice.

Conclusions:

• Mice do not appear to benefit from redundant visual contexts for diagonal-orientation discrimination.
• This suggests a fundamental difference in visual Gestalt perception between mice and higher primates like humans and chimpanzees.