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Description: | E. ZIMMERMANN Leipzig (maker's trade name on the front of the case). MANU Eduard Zimmerman. circa 1906 Emilienstrasse 21, Leipzig, Germany. DES after RANSCHBURG,Paul. 1901 Reutlingen, Germany. This is the storage box for a set of test cards for Ranschburg's apparatus, which is a short term memory test. The subject is asked to recall pairs of words, numbers or colours that are brought into view with increasing difficulty by altering the time intervals and position on a paper disc. The mechanism can be operated by a simple key that connects an electromagnetic relay to a power source. This advances an indexer, via a ratchet, by one space at a time. The investigator attaches a disc, with relevant words, numbers, or colours etc, marked in the sixty equal spaces around the circumference of the card. As the relay indexes the card each word etc appears in a slot on the front of the case, which can be angled to suit the observer. The subject is then asked to associate pairs of words where possible. The istrument was often used with a Romer's sound-key, which is voice operated switch and a Hipp's chronoscope for measuring reaction time . | License: | http://www.hmag.gla.ac.uk/spirit/rights/ | Publisher: | Hunterian Museum and Art Gallery, University of Glasgow | Rights holder: | Hunterian Museum and Art Gallery, University of Glasgow | Subjects: | SCIENTIFIC COLLECTION : | Source: | Hunterian Museum | Creator: | Hunterian Museum and Art Gallery, University of Glasgow | Identifier: | http://www.huntsearch.gla.ac.uk/cgi-bin/... | Language: | en-GB | Go to resource |
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