Røigaard‐Petersen, H. H., Nissen, Th. & Fjerdingstad, E. J. Effect of ribonucleic acid (RNA) extracted from the brain of trained animals on learning in rats. III. Results obtained with an improved procedure. Scand. J. Psychol., 1968, 9, 1–16.—By modifying several steps in an experimental procedure in which rats are injected intracisternally with an RNA extract prepared from the brain of trained rats, and subsequently tested in the same training situation, high reproducibility is obtained. A detailed description of the procedure is given.
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Røigaard-Petersen et al. (1968) studied this question.
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