{"id":"https://openalex.org/W2044845611","doi":"https://doi.org/10.1007/s10479-012-1181-7","title":"Fitting an item response theory model with random item effects across groups by a variational approximation method","display_name":"Fitting an item response theory model with random item effects across groups by a variational approximation method","publication_year":2012,"publication_date":"2012-07-19","ids":{"openalex":"https://openalex.org/W2044845611","doi":"https://doi.org/10.1007/s10479-012-1181-7","mag":"2044845611"},"language":"en","primary_location":{"id":"doi:10.1007/s10479-012-1181-7","is_oa":false,"landing_page_url":"https://doi.org/10.1007/s10479-012-1181-7","pdf_url":null,"source":{"id":"https://openalex.org/S57667410","display_name":"Annals of Operations Research","issn_l":"0254-5330","issn":["0254-5330","1572-9338"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319900","host_organization_name":"Springer Science+Business Media","host_organization_lineage":["https://openalex.org/P4310319900","https://openalex.org/P4310319965"],"host_organization_lineage_names":["Springer Science+Business Media","Springer Nature"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Annals of Operations Research","raw_type":"journal-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5063424617","display_name":"Frank Rijmen","orcid":null},"institutions":[{"id":"https://openalex.org/I1341030882","display_name":"Educational Testing Service","ror":"https://ror.org/03b5q4637","country_code":"US","type":"nonprofit","lineage":["https://openalex.org/I1341030882"]}],"countries":["US"],"is_corresponding":true,"raw_author_name":"Frank Rijmen","raw_affiliation_strings":["Educational Testing Service, Rosedale Road, Princeton, NJ, 08541, USA","Educational Testing Service"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Educational Testing Service, Rosedale Road, Princeton, NJ, 08541, USA","institution_ids":["https://openalex.org/I1341030882"]},{"raw_affiliation_string":"Educational Testing Service","institution_ids":["https://openalex.org/I1341030882"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5044502209","display_name":"Minjeong Jeon","orcid":"https://orcid.org/0000-0002-5880-4146"},"institutions":[{"id":"https://openalex.org/I134446601","display_name":"Berkeley College","ror":"https://ror.org/02xewxa75","country_code":"US","type":"education","lineage":["https://openalex.org/I134446601"]},{"id":"https://openalex.org/I95457486","display_name":"University of California, Berkeley","ror":"https://ror.org/01an7q238","country_code":"US","type":"education","lineage":["https://openalex.org/I95457486"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Minjeong Jeon","raw_affiliation_strings":["Graduate School of Education, UC Berkeley, Berkeley, CA, USA","UC BERKELEY"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Graduate School of Education, UC Berkeley, Berkeley, CA, USA","institution_ids":["https://openalex.org/I95457486"]},{"raw_affiliation_string":"UC BERKELEY","institution_ids":["https://openalex.org/I134446601"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":3,"corresponding_author_ids":["https://openalex.org/A5063424617"],"corresponding_institution_ids":["https://openalex.org/I1341030882"],"apc_list":{"value":2990,"currency":"USD","value_usd":2990},"apc_paid":null,"fwci":1.1324,"has_fulltext":false,"cited_by_count":25,"citation_normalized_percentile":{"value":0.77709642,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":90,"max":98},"biblio":{"volume":"206","issue":"1","first_page":"647","last_page":"662"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10243","display_name":"Statistical Methods and Bayesian Inference","score":0.998199999332428,"subfield":{"id":"https://openalex.org/subfields/2613","display_name":"Statistics and Probability"},"field":{"id":"https://openalex.org/fields/26","display_name":"Mathematics"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10243","display_name":"Statistical Methods and Bayesian Inference","score":0.998199999332428,"subfield":{"id":"https://openalex.org/subfields/2613","display_name":"Statistics and Probability"},"field":{"id":"https://openalex.org/fields/26","display_name":"Mathematics"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10467","display_name":"Psychometric Methodologies and Testing","score":0.9976999759674072,"subfield":{"id":"https://openalex.org/subfields/1803","display_name":"Management Science and Operations Research"},"field":{"id":"https://openalex.org/fields/18","display_name":"Decision Sciences"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}},{"id":"https://openalex.org/T10136","display_name":"Statistical Methods and Inference","score":0.9678000211715698,"subfield":{"id":"https://openalex.org/subfields/2613","display_name":"Statistics and Probability"},"field":{"id":"https://openalex.org/fields/26","display_name":"Mathematics"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/item-response-theory","display_name":"Item response theory","score":0.6446020603179932},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.5903551578521729},{"id":"https://openalex.org/keywords/maximization","display_name":"Maximization","score":0.5753375291824341},{"id":"https://openalex.org/keywords/theory-of-computation","display_name":"Theory of computation","score":0.5173858404159546},{"id":"https://openalex.org/keywords/latent-variable","display_name":"Latent variable","score":0.4831118583679199},{"id":"https://openalex.org/keywords/expectation\u2013maximization-algorithm","display_name":"Expectation\u2013maximization algorithm","score":0.47094783186912537},{"id":"https://openalex.org/keywords/applied-mathematics","display_name":"Applied mathematics","score":0.42173323035240173},{"id":"https://openalex.org/keywords/statistics","display_name":"Statistics","score":0.40927407145500183},{"id":"https://openalex.org/keywords/mathematical-optimization","display_name":"Mathematical optimization","score":0.3863699734210968},{"id":"https://openalex.org/keywords/maximum-likelihood","display_name":"Maximum likelihood","score":0.2661152482032776},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.23615583777427673},{"id":"https://openalex.org/keywords/psychometrics","display_name":"Psychometrics","score":0.14482197165489197}],"concepts":[{"id":"https://openalex.org/C19875794","wikidata":"https://www.wikidata.org/wiki/Q1207340","display_name":"Item response theory","level":3,"score":0.6446020603179932},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.5903551578521729},{"id":"https://openalex.org/C2776330181","wikidata":"https://www.wikidata.org/wiki/Q18358244","display_name":"Maximization","level":2,"score":0.5753375291824341},{"id":"https://openalex.org/C24858836","wikidata":"https://www.wikidata.org/wiki/Q844718","display_name":"Theory of computation","level":2,"score":0.5173858404159546},{"id":"https://openalex.org/C51167844","wikidata":"https://www.wikidata.org/wiki/Q4422623","display_name":"Latent variable","level":2,"score":0.4831118583679199},{"id":"https://openalex.org/C182081679","wikidata":"https://www.wikidata.org/wiki/Q1275153","display_name":"Expectation\u2013maximization algorithm","level":3,"score":0.47094783186912537},{"id":"https://openalex.org/C28826006","wikidata":"https://www.wikidata.org/wiki/Q33521","display_name":"Applied mathematics","level":1,"score":0.42173323035240173},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.40927407145500183},{"id":"https://openalex.org/C126255220","wikidata":"https://www.wikidata.org/wiki/Q141495","display_name":"Mathematical optimization","level":1,"score":0.3863699734210968},{"id":"https://openalex.org/C49781872","wikidata":"https://www.wikidata.org/wiki/Q1045555","display_name":"Maximum likelihood","level":2,"score":0.2661152482032776},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.23615583777427673},{"id":"https://openalex.org/C171606756","wikidata":"https://www.wikidata.org/wiki/Q506132","display_name":"Psychometrics","level":2,"score":0.14482197165489197}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1007/s10479-012-1181-7","is_oa":false,"landing_page_url":"https://doi.org/10.1007/s10479-012-1181-7","pdf_url":null,"source":{"id":"https://openalex.org/S57667410","display_name":"Annals of Operations Research","issn_l":"0254-5330","issn":["0254-5330","1572-9338"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319900","host_organization_name":"Springer Science+Business Media","host_organization_lineage":["https://openalex.org/P4310319900","https://openalex.org/P4310319965"],"host_organization_lineage_names":["Springer Science+Business Media","Springer Nature"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Annals of Operations Research","raw_type":"journal-article"},{"id":"pmh:oai:RePEc:spr:annopr:v:206:y:2013:i:1:p:647-662:10.1007/s10479-012-1181-7","is_oa":false,"landing_page_url":"http://hdl.handle.net/10.1007/s10479-012-1181-7","pdf_url":null,"source":{"id":"https://openalex.org/S4306401271","display_name":"RePEc: Research Papers in Economics","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I77793887","host_organization_name":"Federal Reserve Bank of St. Louis","host_organization_lineage":["https://openalex.org/I77793887"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"article"}],"best_oa_location":null,"sustainable_development_goals":[{"score":0.4399999976158142,"id":"https://metadata.un.org/sdg/17","display_name":"Partnerships for the goals"}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":27,"referenced_works":["https://openalex.org/W126966777","https://openalex.org/W139898524","https://openalex.org/W1596583475","https://openalex.org/W1746680969","https://openalex.org/W1965555277","https://openalex.org/W1967495697","https://openalex.org/W1975811690","https://openalex.org/W1986098702","https://openalex.org/W2017966270","https://openalex.org/W2018126168","https://openalex.org/W2025106680","https://openalex.org/W2034518286","https://openalex.org/W2049633694","https://openalex.org/W2053752283","https://openalex.org/W2061603291","https://openalex.org/W2065248556","https://openalex.org/W2084398551","https://openalex.org/W2099019452","https://openalex.org/W2099620483","https://openalex.org/W2135338737","https://openalex.org/W2142391677","https://openalex.org/W2291425271","https://openalex.org/W2567948266","https://openalex.org/W2725061391","https://openalex.org/W4292024691","https://openalex.org/W6641869264","https://openalex.org/W6996724243"],"related_works":["https://openalex.org/W2328467352","https://openalex.org/W2975773103","https://openalex.org/W2136484569","https://openalex.org/W2159195731","https://openalex.org/W2116418965","https://openalex.org/W3035181661","https://openalex.org/W1976188970","https://openalex.org/W2750968126","https://openalex.org/W2889559465","https://openalex.org/W2990541822"],"abstract_inverted_index":null,"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2025,"cited_by_count":3},{"year":2024,"cited_by_count":1},{"year":2023,"cited_by_count":2},{"year":2022,"cited_by_count":5},{"year":2021,"cited_by_count":2},{"year":2020,"cited_by_count":2},{"year":2019,"cited_by_count":2},{"year":2017,"cited_by_count":1},{"year":2016,"cited_by_count":2},{"year":2015,"cited_by_count":1},{"year":2014,"cited_by_count":3}],"updated_date":"2026-07-23T08:03:31.855105","created_date":"2025-10-10T00:00:00"}