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We recruited and assessed 62 youth at baseline, 1 month (n = 48), and 3 months (n = 38). A Facebook app collected preliminary social network data. Eleven PCAs selected by AI attended a 1-day training and 7 weekly booster sessions. Mixed-effects models with random effects were used to assess change over time. Results. Significant change over time was observed in past 6-month HIV testing (57.9%, 82.4%, 76.3%; p <"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1608.05701","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2016-08-19T19:28:55Z","cross_cats_sorted":["cs.CY"],"title_canon_sha256":"cbf8648d2015ffd9198583520f0ad123fbfdceaa2cb4e16120fffa9535b17e36","abstract_canon_sha256":"0219907da0c2913b298f1b18af5786566db0f1dfb9321e2664fc0f59708e5f76"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:08:27.768947Z","signature_b64":"+EB8PMkk+waFkZ/BPonO7omisN7uPEsBW/se+BrIjQKWcbep5sS4J3S5ENaEUoguvv/z2h+Vc1s3CJ6nSGnxAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"76b1bf4fe21008cc0e8ba34bb5b2d7611865a594cd0b7c381f5e4898fff81648","last_reissued_at":"2026-05-18T01:08:27.768362Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:08:27.768362Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Pilot Testing an Artificial Intelligence Algorithm That Selects Homeless Youth Peer Leaders Who Promote HIV Testing","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CY"],"primary_cat":"cs.AI","authors_text":"Amanda Yoshioka-Maxwell, Amulya Yadav, Eric Rice, Jaih Craddock, Milind Tambe, Robin Petering","submitted_at":"2016-08-19T19:28:55Z","abstract_excerpt":"Objective. 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