Outfoxed: Design and Evaluation of a Modular Interactive Puzzle for Cognitive Enrichment of Zoo Animals

Paper Title

Outfoxed: Design and Evaluation of a Modular Interactive Puzzle for Cognitive Enrichment of Zoo Animals

Publication Info

• Topic area: Cognitive enrichment technologies for zoo animals
• Keywords: Zoo enrichment, Arctic fox, modular puzzle feeder, multisensory feedback, animal welfare, behavioral diversity, habitat utilization, Animal–Computer Interaction (ACI), Human–Computer Interaction (HCI), zoo visitor engagement

Background and Problem

• Problem / challenge: Existing puzzle feeders for zoo animals often lack adaptability, require frequent human intervention, and fail to sustain long-term cognitive engagement. They rarely integrate multisensory elements aligned with animals’ perceptual strengths.
• Significance: Cognitive enrichment is essential for zoo-housed animals to prevent inactivity, abnormal behaviors, and promote welfare. Enrichment systems that enhance agency and behavioral diversity can improve animal well-being and visitor empathy.
• Motivation and related work: Prior research in zoo enrichment and ACI has explored puzzle feeders and interactive technologies but often faced challenges such as habituation, limited sensory integration, and manual resets. This study builds on these foundations to address sustained engagement and adaptability through modular, multisensory systems.

Solution

• Proposed approach: A modular adaptive puzzle-feeder designed to promote animal agency, independence, and multisensory engagement, with progressive difficulty levels and reduced human intervention.
• Novelty:
  1. Development of a modular puzzle system with adjustable difficulty and multisensory feedback.
  2. Integration of HCI and ethological evaluation methods to assess enrichment outcomes holistically.
  3. Empirical demonstration of sustained engagement and behavioral diversity in an Arctic fox.
  4. Multi-stakeholder analysis including zoo staff and visitor perspectives.
• Procedure and key techniques:
  • Design of a semi-automated puzzle feeder with interchangeable components for varied difficulty.
  • Deployment with an Arctic fox (Vulpes lagopus) over five sessions, progressively increasing puzzle complexity.
  • Behavioral coding using ethograms, spatial mapping, and multisensory engagement metrics.
  • Surveys and observational data from visitors and zoo staff to assess human perceptions and operational feasibility.

Results

• Concrete findings:
  • Sustained engagement across sessions, with an average of 46.5% session time spent interacting with the puzzle.
  • Behavioral diversity increased by 148%, with Shannon entropy indices rising from 0.49 (baseline) to 1.27 (deployment).
  • Habitat utilization expanded by 218.4%, with broader spatial use during deployment sessions.
  • Visitor engagement time doubled during deployments (median 38s baseline vs. 79.5s deployment, p < 0.001).
• Advantage over baselines:
  • Resting behaviors reduced by 76.51%, replaced by active engagement, locomotion, and exploration.
  • Progressive puzzle difficulty sustained interest and prompted adaptive problem-solving strategies.
• Experiments / evaluation:
  • Ten sessions: five baseline and five deployments with an Arctic fox, supplemented by pilot testing with coatis.
  • Metrics included behavioral coding, spatial heatmaps, multisensory response times, and human surveys.
• Limitations and future work:
  • Single-species focus limits generalizability; further cross-species testing is needed.
  • Wizard-of-Oz control simulated automation; future iterations should test fully autonomous systems.
  • Long-term effects and novelty impacts require extended deployment studies.

Summary

This study introduced a modular, adaptive puzzle-feeder designed to enhance cognitive enrichment for zoo animals. Deployments with an Arctic fox demonstrated sustained engagement, increased behavioral diversity, and expanded habitat use, while visitor empathy and keeper workflows also benefited. The system’s modularity supports personalization across species, and its multisensory design aligns with animal perceptual strengths. Findings suggest that interactive enrichment technologies can simultaneously advance animal welfare, visitor education, and operational feasibility, contributing to HCI and ACI research in multispecies contexts.