{"work":{"id":"b3600e6a-96c5-428e-bb81-5ca2d9748742","openalex_id":"https://openalex.org/W1549788644","doi":"10.4324/9780203887332","arxiv_id":null,"raw_key":null,"title":": Visible Learning: A Synthesis of Over 800 Meta-Analyses Relating to Achievement , ( 2009 )","authors":null,"authors_text":"bbook Hattie , J","year":2009,"venue":null,"abstract":null,"external_url":"https://doi.org/10.4324/9780203887332","cited_by_count":6970,"metadata_source":"openalex","metadata_fetched_at":"2026-08-05T02:28:24.338817+00:00","pith_arxiv_id":null,"created_at":"2026-08-04T08:13:29.716017+00:00","updated_at":"2026-08-05T02:28:24.338817+00:00","title_quality_ok":true,"display_title":null,"render_title":": Visible Learning: A Synthesis of Over 800 Meta-Analyses Relating to Achievement , ( 2009 )"},"hub":{"state":{"tier_text":"hub","tier":"hub","tier_reason":"10+ Pith inbound or 1,000+ external citations","pith_inbound_count":1,"external_cited_by_count":6970},"tier":"hub","role_counts":[],"polarity_counts":[],"runs":{},"summary":{},"graph":{},"authors":[]}}