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  • Title: Effect of a mid-series anchor on absolute judgments of duration by schizophrenics, neurologically impaired, and normals.
    Author: Locke SA.
    Journal: Percept Mot Skills; 1975 Apr; 40(2):671-7. PubMed ID: 1178344.
    Abstract:
    36 normal, 36 schizophrenic, and 36 neurologically impaired Ss were compared for their ability to temporally discriminate brief auditory stimuli. The experimental task was the absolute judgment of 3, 5, or 9 stimuli ranging in duration from 0.10 to 1.90 sec. Half of the Ss in each group were "assisted" by the presentation of a repeated mid-series anchor. The interval between the presentation of the anchor and the variable stimuli was varied. With the addition of a mid-series anchor, normal Ss demonstrated an increase in information transmission and a decrease in response stereotypy; schizophrenics demonstrated a slight decrease in information transmission and a slight increase in response stereotypy; neurologically impaired Ss were essentially unaffected. Changes in interstimulus interval on the anchored judgment task did not influence information transmission.
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