Reaction time and critical duration for lines' detection and identification of their orientation

Margarita Zlatkova, Angel Vassilev, D Mitov

    Research output: Contribution to journalArticle

    Abstract

    Reaction time (RT) and duration of complete temporal summation (tc) were studied for both detection of lines and identification of their orientation. The RT was studied as a function of stimulus intensity, number of orientations and angular difference between them. The temporal summation was studied for detection and identification at several angular differences. It was found that the intensity-dependent part of RT for identification at angular difference of 22 degrees equaled that for detection but considerably lengthened at smaller angular differences (10 degrees). The intensity-independent part of RT was minimal for detection and maximal for identification with eight alternatives. The tc increased from 30 msec for detection and identification with the accuracy of 22 degrees to 100 msec for identification with the accuracy of 5 degrees. The results support the conclusion that detection and coarse identification differ only in their later stages and that accurate identification involves additional processes with longer time-constants compared to coarse identification.
    LanguageEnglish
    Pages42-49
    JournalActa Physiologica et Pharmacologica Bulgarica
    Volume12
    Issue number3
    Publication statusPublished - 1986

    Cite this

    Zlatkova, M., Vassilev, A., & Mitov, D. (1986). Reaction time and critical duration for lines' detection and identification of their orientation. 12(3), 42-49.
    Zlatkova, Margarita ; Vassilev, Angel ; Mitov, D. / Reaction time and critical duration for lines' detection and identification of their orientation. 1986 ; Vol. 12, No. 3. pp. 42-49.
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    Zlatkova, M, Vassilev, A & Mitov, D 1986, 'Reaction time and critical duration for lines' detection and identification of their orientation', vol. 12, no. 3, pp. 42-49.

    Reaction time and critical duration for lines' detection and identification of their orientation. / Zlatkova, Margarita; Vassilev, Angel; Mitov, D.

    Vol. 12, No. 3, 1986, p. 42-49.

    Research output: Contribution to journalArticle

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    T1 - Reaction time and critical duration for lines' detection and identification of their orientation

    AU - Zlatkova, Margarita

    AU - Vassilev, Angel

    AU - Mitov, D

    PY - 1986

    Y1 - 1986

    N2 - Reaction time (RT) and duration of complete temporal summation (tc) were studied for both detection of lines and identification of their orientation. The RT was studied as a function of stimulus intensity, number of orientations and angular difference between them. The temporal summation was studied for detection and identification at several angular differences. It was found that the intensity-dependent part of RT for identification at angular difference of 22 degrees equaled that for detection but considerably lengthened at smaller angular differences (10 degrees). The intensity-independent part of RT was minimal for detection and maximal for identification with eight alternatives. The tc increased from 30 msec for detection and identification with the accuracy of 22 degrees to 100 msec for identification with the accuracy of 5 degrees. The results support the conclusion that detection and coarse identification differ only in their later stages and that accurate identification involves additional processes with longer time-constants compared to coarse identification.

    AB - Reaction time (RT) and duration of complete temporal summation (tc) were studied for both detection of lines and identification of their orientation. The RT was studied as a function of stimulus intensity, number of orientations and angular difference between them. The temporal summation was studied for detection and identification at several angular differences. It was found that the intensity-dependent part of RT for identification at angular difference of 22 degrees equaled that for detection but considerably lengthened at smaller angular differences (10 degrees). The intensity-independent part of RT was minimal for detection and maximal for identification with eight alternatives. The tc increased from 30 msec for detection and identification with the accuracy of 22 degrees to 100 msec for identification with the accuracy of 5 degrees. The results support the conclusion that detection and coarse identification differ only in their later stages and that accurate identification involves additional processes with longer time-constants compared to coarse identification.

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