Table 1.

Behavioral measures of performance (traits) in the order they were scored.

Behavior measures
Short title	Full title and description of behavioral trait
Control	Control (responsiveness to verbal and or physical commands). The proportion of commands obeyed and speed of response.
Motivation	Motivation (enthusiasm to search). How keen or eager the dog is to search – assessed from the dog's behavior leading up to and at the start of the search.
Distraction	Distraction when searching. A distraction is anything that takes the dog's attention away from searching or from starting to search, including urinating.
Search pattern	Ability to follow search pattern. How well the dog follows the correct search pattern, without missing areas or needing constant correction. Not following search pattern would include: HAS, pulling off-line, wide back-seek, or following visual cues; VS, pulling/moving away from vehicle being searched, searching ground, or not searching “overlap.”
Stamina	Stamina throughout search. How much motivation or enthusiasm decreases over the search, e.g., due to tiredness or loss of confidence.
Indication	Strength of indication.
Confidence	Confidence (absence of fear/anxiety) How confident or relaxed the dog is.
Thoroughness	Thoroughness of search. How much of the search the dog is actively searching: HAS, sniffing with its head down and nose to the ground for the entire search, including on the back-seek and searching right up to the handler; VS, sniffing with nose to the vehicle.
Independence	Independence. Ability of the dog to search without guidance, (not needing, or looking for, constant guidance), including being able to continue searching when further away from handler and on back-seek.
Speed	Speed of search
Detect & locate	Ability to detect and locate scent to source

Full titles and descriptions are as presented to the raters, but for the sake of brevity the behaviors are referred to in the text by their shortened title (in bold).