. Effects of amount of food reinforcement on fixed-interval-induced attack in pigeons. Pigeons; Reinforcement (Psychology). P-1313 54 o i X UJ lij o < 160- 120. I t g a: o Q. O OH °- Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Pitts, Raymond

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Keywords: ., boo, bookcentury1900, bookcollectionamericana, booksubjectpigeons