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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">I.P. Pavlov Journal of Higher Nervous Activity</journal-id><journal-title-group><journal-title xml:lang="en">I.P. Pavlov Journal of Higher Nervous Activity</journal-title><trans-title-group xml:lang="ru"><trans-title>Журнал высшей нервной деятельности им. И.П. Павлова</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0044-4677</issn><issn publication-format="electronic">3034-5316</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">652068</article-id><article-id pub-id-type="doi">10.31857/S0044467724060099</article-id><article-categories><subj-group subj-group-type="toc-heading"><subject>МЕТОДИКА</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">“Object permanence” test for rats. First experiments</article-title><trans-title-group xml:lang="ru"><trans-title>Когнитивный тест на «неисчезаемость». Модифицированный вариант для крыс</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Korolev</surname><given-names>A. G.</given-names></name><name xml:lang="ru"><surname>Королев</surname><given-names>А. Г.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Biology Department; Medical Institute</p></bio><bio xml:lang="ru"><p>Биологический факультет; Медицинский институт</p></bio><email>korolevpost@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ogourtsov</surname><given-names>P. D.</given-names></name><name xml:lang="ru"><surname>Огурцов</surname><given-names>П. Д.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Biology Department</p></bio><bio xml:lang="ru"><p>Биологический факультет</p></bio><email>korolevpost@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Inozemtsev</surname><given-names>A. N.</given-names></name><name xml:lang="ru"><surname>Иноземцев</surname><given-names>А. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Biology Department</p></bio><bio xml:lang="ru"><p>Биологический факультет</p></bio><email>korolevpost@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Poletaeva</surname><given-names>I. I.</given-names></name><name xml:lang="ru"><surname>Полетаева</surname><given-names>И. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Biology Department</p></bio><bio xml:lang="ru"><p>Биологический факультет</p></bio><email>korolevpost@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Moscow State University</institution></aff><aff><institution xml:lang="ru">МГУ имени М.В. Ломоносова</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">P. Lumumba RUPF</institution></aff><aff><institution xml:lang="ru">РУДН им. П. Лумумбы</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-12-11" publication-format="electronic"><day>11</day><month>12</month><year>2024</year></pub-date><volume>74</volume><issue>6</issue><fpage>756</fpage><lpage>760</lpage><history><date date-type="received" iso-8601-date="2025-02-02"><day>02</day><month>02</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Российская академия наук</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://innoscience.ru/0044-4677/article/view/652068">https://innoscience.ru/0044-4677/article/view/652068</self-uri><abstract xml:lang="en"><p>The description of the developed experimental set, permitting to evaluate rats solution of the “object permanence” test (be J. Piaget), which reflects animal capacity to operate one of the most simple empirical rules (by Krushinsky), i.e. capacity to solve elementary logic task. An animal, being placed in the brightly lit part of the box, is eager to run into the dark one via underpass, although after the first attempts the underpass was hidden by several means, and now an animal can solve the task overcoming the obstacle in case it operates the object permanence rule. The test solution does not require the previous learning, and it is similar to the test used in mice experiments. The test was applied in experiments with rats of five genetic groups – outbred Wistar and Long-Evans rats, rats of inbred audiogenic-prone Krushinsky – Molodkina (KM) strain, the strain derived from KM rats, selected for audiogenic non-proneness and inbred SHR strain with spontaneous arterial hypertension. The preliminary experiments (performed with an animal during one experimental day) revealed interstrain differences with the test solution prevalence in SHR strain. This test could be used in pharmacological and neurophysiological experiments with rats.</p></abstract><trans-abstract xml:lang="ru"><p>Дается описание разработанной экспериментальной установки, позволяющей оценивать решения крысами теста на постоянство объекта (object permanence, по Ж. Пиаже), что является проявлением способности животных к оперированию одним из простейших эмпирических законов «неисчезаемости» (по Крушинскому), т.е. способности к решению элементарной логической задачи. Помещенное в ярко освещенную часть камеры животное может убежать через лаз в комфортное темное отделение, но после первых попыток лаз закрывают разными способами, и для выполнения теста животному необходимо преодолеть препятствие, оперируя правилом «неисчезаемости». Выполнение теста не требует предварительного научения, и он аналогичен тесту на «неисчезаемость», использующемуся в экспериментах с мышами. Проведено тестирование крыс пяти разных генетических групп – крыс аутбредных линий Вистар и Лонг-Эванс, крыс инбредной линии Крушинского-Молодкиной (КМ) (с предрасположенностью к аудиогенной эпилепсии), производной от КМ линии «0» (без аудиогенной эпилепсии) и крысы инбредной линии SHR со спонтанной артериальной гипертензией. Проведенные предварительные эксперименты (выполнявшиеся с каждым животным в пределах одного опытного дня) выявили межлинейные различия в решении теста с превосходством показателей крыс линии SHR. Использование данного теста возможно в нейрофизиологических и фармакологических исследованиях поведения крыс.</p></trans-abstract><kwd-group xml:lang="en"><kwd>animal cognitive ability</kwd><kwd>object permanence test</kwd><kwd>experimental setup</kwd><kwd>rat strains</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>когнитивные способности животных</kwd><kwd>тест на «неисчезаемость»</kwd><kwd>экспериментальная установка</kwd><kwd>линии крыс</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Правительство Российской Федерации</institution></institution-wrap><institution-wrap><institution xml:lang="en">Government of the Russian Federation</institution></institution-wrap></funding-source><award-id>121032500080-8</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Крушинский Л.В. 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