Biomedical subjects
Publications and source records attributed to I ROCK.
Newborn guppies and newly hatched praying mantids were placed inside a stationary cylinder containing a columnar pattern such as is used to elicit the optokinetic reflex. By illuminating columns in sequence, the pattern was made to appear to rotate. All of the animals tested circled in the direction of apparent movement. As with humans, movement was only perceived at intermediate rates of flashing.
Observers were presented with an object whose visual shape, because of optical distortion, differed considerably from its tactual shape. After simultaneously grasping and viewing the object, the observers were required to indicate their impression of it by drawing it or by matching another object to it. The results reveal that vision is strongly dominant, often without the observer's being aware of a conflict.
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The substitution method may lead to poorer learning than the customary repetition method when learned pairs are eliminated after each trial. This results from a procedure in which the subject is required to spell the response. Spelling leads to greater difficulty in learning the response item but repetition tends to counteract it.
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