Problem solving and ”observation learning” in a carrion crow

A juvenile of Carrion Crow observing and emulating another Crow in walnut-cracking

Gakushuu shomondai no kaiketsu

Daisuugaku gakushuu no shikata to mondai no tokikata

Kikagaku : gakushuu no shikata to mondai no tokikata

Kokugo gakushuujou no shomondai to sono kaitou

Tsuzurikata gakushuujou no shomondai to sono kaitou

大学自治問題の解決

Chuutou gakkou nyuugaku mondai no kaiketsu

Daisuugaku : mondai kaiketsu no houshin

帝水と冷蔵問題の解決

Feeding and drinling in a duck 1

Feeding and drinking in a duck 2

日本移民の捌け口 : 此解決が大問題 : (和蘭紙の観察)

Yuuwa mondai no honshitsu to kaiketsu : yuuwa mondai no shakaigakuteki kenkyuu

Gaikoku chiri mondai no kaishaku : juken gakushuu

「転業」問題とその解決 (1〜5)

Kagaku mondai no mikata to tokikata : jukenyou jishuuyou

国会問題解決難 : 政学会妥協問題の裏面

仏人の日本工業評 : 労働問題解決＝仏国一代議士の観察

高商問題解決点 : [奥田文相提案と商科大学問題]

Gentaiken o kiban to shita kagakuteki mondai kaiketsu gakushuu no moderuka ni kansuru kenkyuu

賠償問題と仏国 : ルシュール氏の解決策

Daitetsukyoku kyoushuujo nyuushi mondai kaitoushuu : fu gakushuuhou to jukenhou

決定までの経過 : 濠洲との紛争問題解決