Some effects of detection dogs on passenger behavior at border control ports
Dog jacket color changes how strangers feel and act—lose the vest for friendly contact, add it for swift compliance.
01Research in Context
What this study did
Williams et al. (2023) watched travelers meet detection dogs at a border gate.
The team compared two looks: dog in bright police vest versus dog with no vest.
They timed eye contact, noted smiles or frowns, and counted who stepped forward.
What they found
No-jacket dogs drew more friendly talk and longer eye contact.
The same dogs in high-vis vests made people look away faster and show tense faces.
Passengers still obeyed orders, but their feelings flipped from warm to wary.
How this fits with other research
Singh et al. (2009) reviewed weighted vests for kids and found no benefit.
Their take: special clothes rarely change behavior on their own.
Williams shows the opposite—clothes did matter—because the jacket carried police meaning, not weight.
Van Houten et al. (2010) used a car gadget to make drivers buckle up; both studies tweak one real-world cue to shift adult safety moves without extra rewards.
Quigley-McBride et al. (2026) warn that handler beliefs can sway dog results; Williams adds that public beliefs matter too—gear alone sends signals.
Why it matters
If you run community programs, note that equipment talks before you do.
A therapy dog, safety mascot, or peer tutor in plain clothes looks less like authority and more like a friend.
Try removing badges or vests when you want warm approach and open conversation.
Keep the gear on when you need quick compliance and distance.
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02At a glance
03Original abstract
Detection dogs are used at border controls as an antecedent intervention to deter the smuggling of contraband. However, there is little research that has explored how the presence of dogs might affect passenger behavior. We observed passengers' behavior at a port when there was an officer alone, an officer with a dog, and an officer with a dog wearing a florescent yellow jacket with "police" written on it for increased salience. We measured eye contact, vocal-verbal interactions, facial expressions, and nonvocal verbal gestures toward the officer and dog, and changes in passenger direction. Passengers looked, talked, and had the highest frequencies of positive facial expressions when the dog was not wearing a jacket. However, passengers looked toward the dog the quickest and had the highest frequency of negative facial expressions and gestures when the dog was wearing a jacket. We discuss how these findings might inform antecedent interventions to address undesirable behavior such as smuggling.
Journal of Applied Behavior Analysis, 2023 · doi:10.1002/jaba.985