Results: 4

2.
Figure 3

Figure 3. Proportion of Self-Directed Behavior towards the Mark Area Expressed as a Proportion of Overall Self-Directed Behavior in Subjects Gerti and Goldie. From: Mirror-Induced Behavior in the Magpie (Pica pica): Evidence of Self-Recognition .

Orange bars refer to tests with a colored mark (yellow or red), black bars to tests with a black control mark (sham condition). In Gerti (p < 0.005, Fisher exact test), as well as in Goldie (p < 0.05, Fisher exact test), mark-directed behavior was significantly enhanced in the colored mark and mirror condition.

Helmut Prior, et al. PLoS Biol. 2008 August;6(8):e202.
3.
Figure 2

Figure 2. Examples of the Behaviors That Were Used for Quantitative Analysis. From: Mirror-Induced Behavior in the Magpie (Pica pica): Evidence of Self-Recognition .

(A) Attempt to reach the mark with the beak; (B) touching the mark area with the foot; (C) touching the breast region outside the marked area; (D) touching other parts of the body. Behaviors (A) and (B) entered the analysis as mark-directed behavior; behaviors (C) and (D) and similar actions towards other parts of the body were considered self-directed, but not related to the mark.

Helmut Prior, et al. PLoS Biol. 2008 August;6(8):e202.
4.
Figure 4

Figure 4. Proportion of Self-Directed Behavior towards the Mark Area in Additional Tests. From: Mirror-Induced Behavior in the Magpie (Pica pica): Evidence of Self-Recognition .

(A) Proportion of mark-directed behavior by Gerti in a test session with change of marks in consecutive 5-min intervals. The color of each bar refers to the color of the mark used and subsequent 5-min periods of the test. Activity towards the mark was high for all colored marks, but low in the control condition (black mark). In all of the color conditions, the bird removed the mark.
(B) Results from the first set of additional controls with a grid in front of the experimental cage instead of a Plexiglas wall. In the colored mark and mirror condition, mark-directed behavior was higher than in the colored mark and no-mirror condition (p < 0.02, Fisher exact test).

Helmut Prior, et al. PLoS Biol. 2008 August;6(8):e202.

Supplemental Content

Recent activity

Your browsing activity is empty.

Activity recording is turned off.

Turn recording back on

See more...
Write to the Help Desk