Figure 2 .

Experimental details of the HI test used to analyze postencounter distal threat. (A) Time line of HI test protocol. (B) Video still during intruder phase of the HI test. (C) Schematic of the top right quadrant of the home cage (i.e., test quadrant) showing division into zones for height and depth. (D) Behavioral measures that contribute to the exploratory factor analysis and their coefficients used to calculate the overall score of anxiety-like behavior. The measures contributing significantly are shown in black. (E) Examples of masks used by the HI.