{"fact":"Crows exhibited strong preferences for certain positions or stimuli, possibly hindering their ability to learn and adapt in the object discrimination tasks.","context":"The relatively high estimates for stimulus and position preference suggests that these preferential tendencies, which are much less common in bluejays and myna birds, may have interfered with ODLS acquisition.","source":"Maxwell W. Hunter; Alan C. Kamil, Marginal learning-set formation by the crow (Corvus brachyrhynchos), 10.3758/bf03333275","index":545}