An attempt was made to determine the effects of tone on the visual acuity threshold of the rat. Acuity thresholds were ascertained using the Lashley jumping stand with black and white stimulus cards. A pure tone of 7,500 cps at three intensity levels was introduced as accessory stimulus. The results indicated (1) no consistent lowering of S's visual acuity by the introduction of a tone, (2) no within-S differences between tone and no tone when the above threshold and threshold stimuli were analyzed separately, (3) increasingly better performance from low to medium intensities with a decrease in performance at the higher intensity level.
Get full access to this article
View all access options for this article.
References
1.
CowlesJ. T.PenningtonL. A.An improved conditioning technique for determining auditory acuity of the rat. J. Psychol., 1943, 15, 41–47.
2.
GellermannL. W.Chance orders of alternating stimuli in visual discrimination experiments. J. genet. Psychol., 1933, 42, 206–208.
3.
HartmannG. W.Changes in visual acuity through simultaneous stimulation of other sense organs: II. J. exp. Psychol., 1933, 16, 393–407. (a)
4.
HartmannG. W.The increase of visual acuity in one eye through illumination of the other: I. J. exp. Psychol., 1933, 16, 383–392. (b)
5.
KravkovS. V.Changes in the visual acuity in one eye under the influence of the illumination of the other or of acoustic stimuli. J. exp. Psychol., 1934, 17, 805–812.
6.
LashleyK. S.The mechanism of vision: I. A method for rapid analysis of pattern-vision in the rat. J. genet. Psychol., 1930, 37, 453–460.
7.
LondonI. D.Research on sensory interaction in the Soviet Union. Psychol. Bull., 1954, 51, 531–568.
