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171.
Jentzsch I Leuthold H Ulrich R 《Journal of experimental psychology. Human perception and performance》2007,33(3):610-626
The mechanism underlying the reaction time (RT2) slowing to the 2nd of 2 successively presented stimuli (S1 and S2) in the psychological refractory period paradigm was investigated. Stimulus onset synchrony (SOA) between S1 and S2, contrast of S2, and Task 2 set-level compatibility was manipulated. Specifically, the authors used a psychophysiological approach to examine RT2 slowing in trials in which the reaction time to S1 (RT1) was shorter than the SOA. For trials with RT1 < SOA, the clear decrease in RT2 with increasing SOA was underadditive with the S2 contrast effect, but additive with compatibility. Electrophysiological measures revealed an exclusively premotoric locus of RT2 slowing. These findings indicate that a central bottleneck stage is occupied for some period after response to S1 execution, consistent with an extended response selection bottleneck account. 相似文献
172.
Sara A. Stevens Greg L. West Naseem Al-Aidroos Ulrich W. Weger Jay Pratt 《Psychonomic bulletin & review》2008,15(6):1148-1153
It has been suggested that two types of uninformative central cues produce reflexive orienting: gaze and arrow cues. Using
the criterion that voluntary shifts of attention facilitate both response speed and perceptual accuracy, whereas reflexive
shifts of attention facilitate only response speed (Prinzmetal, McCool, & Park, 2005), we tested whether these cues produce
reflexive or volitional shifts of attention. A cued letter discrimination task was used with both gaze (Experiments 1A and
1B) and arrow (Experiments 2A and 2B) cues, in which participants responded to the identity of the target letter. In the response
time (respond speed) tasks, participants were asked to respond as quickly as possible to the target; in the accuracy (perceptual
quality) tasks, participants were asked to respond as accurately as possible. For both cue types, compatible cues were found
to facilitate response speed but not perceptual accuracy, indicating that both gaze and arrow cues generate reflexive shifts
in attention. 相似文献
173.
Responses to an imperative stimulus (IS) are especially fast when they are preceded by a warning signal (WS). When the interval between WS and IS (the foreperiod, FP) is variable, reaction time (RT) is not only influenced by the current FP but also by the FP of the preceding trial. These sequential effects have recently been proposed to originate from a trace conditioning process, in which the individuals learn the temporal WS-IS relationship in a trial-by-trial manner. Research has shown that trace conditioning is maximal when the temporal interval between the conditioned and unconditioned stimulus is between 0.25 and 0.60 s. Consequently, one would predict that sequential effects occur especially within short FP contexts. However, this prediction is contradicted by Karlin [Karlin, L. (1959). Reaction time as a function of foreperiod duration and variability. Journal of Experimental Psychology, 58, 185-191] who did not observe the typical sequential effects with short FPs. To investigate temporal preparation for short FPs, three experiments were conducted, examining the sequential FP effect comparably for short and long FP-sets (Experiment 1), assessing the influence of catch trials (Experiment 2) and the case of a very dense FP-range (Experiment 3) on sequential FP effects. The results provide strong evidence for sequential effects within a short FP context and thus support the trace conditioning account of temporal preparation. 相似文献
174.
Knowledge about suicide might be positively correlated with local suicide prevalence. This hypothesis was tested with a sample of 107 medical and social science undergraduates from Estonia, a country with a high suicide rate, using Hubbard and McIntosh's 1992 Revised Facts on Suicide Quiz. Compared (independent-groups t tests) with a sample of undergraduates from Austria, which has a markedly lower suicide rate, Estonians presented significantly higher overall knowledge about suicide (d = 0.39), particularly concerning demographic and epidemiological facts about suicide (d = 0.77) but not pertaining to clinical and interpersonal knowledge contents (d = -0.06). Study limitations and suggestions for extension of this preliminary inquiry are discussed. 相似文献
175.
To examine the nature of the information that guides eye movements to previously read text during reading (regressions), we used a relatively novel technique to request a regression to a particular target word when the eyes reached a predefined location during sentence reading. A regression was to be directed to a close or a distant target when either the first or the second line of a complex two-line sentence was read. In addition, conditions were created that pitted effects of spatial and linguistic distance against each other. Initial regressions were more accurate when the target was spatially near, and effects of spatial distance dominated effects of verbal distance. Initial regressions rarely moved the eyes onto the target, however, and subsequent "corrective" regressions that homed in on the target were subject to general linguistic processing demands, being more accurate during first-line reading than during second-line reading. The results suggest that spatial and verbal memory guide regressions in reading. Initial regressions are primarily guided by fixation-centered spatial memory, and corrective regressions are primarily guided by linguistic knowledge. 相似文献
176.
This paper examines three issues concerning the frequently documented negative correlation between formal education and ethnic prejudice, namely its reliability, its validity and the manner in which it is mediated. Reliability is demonstrated across three indices of ethnic attitudes in seven representative samples drawn from four European countries (West Germany, Netherlands, France, Great Britain; total N=3788). The hypothesis that this correlation reflects only the tendency of more highly educated respondents to give more socially desirable answers and not true attitude differences was inconsistent with the finding from the survey data that educational level also correlated negatively with responses to an index of subtle prejudice. Results from an experiment employing the bogus pipeline procedure similarly refute this hypothesis, indicating that significant education-related differences in expressed prejudice remain under conditions in which the tendency to give socially desirable responses is reduced. Finally, path analysis based on the survey data show that part but not all of the association between low education and ethnic prejudice is mediated by social psychological variables, particularly group relative deprivation, perceived belief incongruency, political conservatism, and acceptance of inter-ethnic contact. 相似文献
177.
It is assumed that in a free-recall task the short-term store serves as a memory buffer between the long-term store and a final motor stage of word production. Because of this the retrieval process in long-term store is not hindered by the final motor stage of word production since continued output from the long-term store queues in the buffer for motoric processing. Otherwise a time consuming communication between the two processes would be necessary. A stochastic model of this conceptualization is provided to predict the temporal course of free recall as well as a paradigm in which the contribution of the short-term store in free recall can be studied. The experimental results from this paradigm were used to test the model and to estimate short-term storage capacity on the basis of the time course of free recall. The model predictions were in good agreement with the data and the capacity estimate coincides well with estimates found by totally different methods reported in the literature. 相似文献
178.
Visual search studies have shown that attention can be top-down biased to a specific target color, so that only items with this color or a similar color can capture attention. According to some theories of attention, colors from different categories (i.e., red, green, blue, yellow) are represented independently. However, other accounts have proposed that these are related—either because color is filtered through broad overlapping channels (4-channel view), or because colors are represented in one continuous feature space (e.g., CIE space) and search is governed by specific principles (e.g., linear separability between colors, or top-down tuning to relative colors). The present study tested these different views using a cueing experiment in which observers had to select one target color (e.g., red) and ignore two or four differently colored distractors that were presented prior to the target (cues). The results showed clear evidence for top-down contingent capture by colors, as a target-colored cue captured attention more strongly than differently colored cues. However, the results failed to support any of the proposed views that different color categories are related to one another by overlapping channels, linear separability, or relational guidance (N = 96). 相似文献
179.
In several areas of personality research (e.g., personal networks, interpersonal behaviour, academic effort), the empirical data represent a multilevel structure, in which within-person variables are nested within individuals. Both within-person variation and between-person differences can be related to outcome variables (e.g., emotions, life satisfaction). One major precondition for aggregating within-person data to the between-person level is sufficient reliability of the aggregated data, a point that has received scant attention in previous research. Drawing on the example of personal goal research, we recommend that the two major forms of the intraclass correlation coefficient—the ICC(1) and the ICC(2)—be applied to within-person data in idiographic research designs. These indices allow the homogeneity and reliability of within-person data to be determined separately. Their application is illustrated using data from a study with 4,565 young adults. 相似文献
180.
William Ulrich 《Philosophical Studies》1977,32(3):313-319