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  • 1
    Electronic Resource
    Electronic Resource
    Effects of spatial and symbolic precues on localization performance (2000)
    Springer
    Psychological research 64 (2000), S. 66-80 
    Details
    ISSN: 1430-2772
    Source: Springer Online Journal Archives 1860-2000
    Topics: Psychology
    Notes: Abstract One of the fundamental properties of spatial vision is the ability to localize objects in space. According to a recent proposal, accurate localization performance involves the operation of two systems: the attention system and the eye movement system. Upon stimulus presentation, attention is shifted to the target area: this provides coarse location information. Subsequently, a saccadic eye movement is executed: this provides fine location information. In this study we tested predictions derived from this model concerning the effects of precue information on localization performance. In a series of five experiments we manipulated duration of precue (71, 400, and 1,000 ms) and type of precue (spatial versus symbolic). Results showed that very short duration (i.e., 71 ms) spatial precues improved localization performance whereas very short duration symbolic precues did not. In contrast, the 1,000 ms duration precue condition showed similar amounts of precuing benefit for the spatial and symbolic precues. This pattern of differential precuing effects corroborated the two-process model of localization performance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004260000027
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Spatial localization: tests of a two-process model (1995)
    Springer
    Experimental brain research 102 (1995), S. 531-539 
    Details
    ISSN: 1432-1106
    Keywords: Eye movements ; Saccades ; Attention ; Localization ; Human
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The present study examined the recently proposed two-process model of localization performance in which a shift of attention, providing coarse location information, is followed by a saccadic eye movement, providing fine location information. In experiment 1 the nature of the localization response was manipulated. In contrast to the indirect response mode used in the study by Adam et al., i.e., manipulating the “arrow” keys to move the cursor to the target location, experiment 1 required subjects to point to the target location. The high degree of similarity between the pattern of results obtained with the pointing and cursor response indicated that performance in the localization paradigm was not differentially affected by the nature of the required response. In experiment 2 the characteristics of the backward masking stimulus was manipulated by employing three masking conditions: (1) a long-duration mask; (2) a short-duration mask (100 ms); and (3) a nomask condition. Results showed that the long-duration mask caused interference at short and facilitation at long intervals between onset of target and mask; the short-duration mask caused interference only at short intervals. Overall the findings were consistent with the two-process model of localization performance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00230657
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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