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221.
Hommel B 《Psychological research》2004,68(2-3):74-90
The implications of an ideomotor approach to action control were investigated. In Experiment 1, participants made manual responses to letter stimuli and they were presented with response-contingent color patches, i.e., colored action effects. This rendered stimuli of the same color as an action's effect effective primes of that action, suggesting that bilateral associations were created between actions and the effects they produced. Experiment 2 combined this set-up with a manual Stroop task, i.e., participants responded to congruent, neutral, or incongruent color-word compounds. Standard Stroop effects were observed in a control group without action effects and in a group with target-incompatible action effects, but the reaction time Stroop effect was eliminated if actions produced target-compatible color effects (e.g., blue word --> left key --> blue patch). Experiment 3 did not replicate this interaction between target-effect compatibility and color-word congruency with color words as action effects, which rules out semantically based accounts. Theoretical implications for both action-effect acquisition and the Stroop effect are discussed. It is suggested that learning action effects, the features of which overlap with the target, allows and motivates people to recode their actions in ways that make them more stimulus-compatible. This provides a processing shortcut for translating the relevant stimulus into the correct response and, thus, shields processing from the impact of competing word distractors. 相似文献
222.
People find it difficult to switch between two tasks, even if they have time to prepare—the so-called residual task shift
cost. We studied a switch of tasks from picture naming to word reading, using picture-word Stroop stimuli. Consistent with
previous findings, we demonstrate that a large part of the observed task shift cost was due to priming from prior stimulus-response
episodes, in which the current task stimulus was encountered in a competing task. We further show that this task-priming effect
generalizes to semantically related stimuli, which opens the possibility that most or all of these residual shift costs reflect
some sort of generalized proactive interference from previous stimulus-task episodes. 相似文献
223.
The ratio between the 2nd and 4th fingers (2D:4D)-a potential proxy for prenatal testosterone (T) exposure-shows a sex difference, with males usually having lower mean values; the latter potentially indicates higher prenatal T exposure. We studied relations between 2D:4D and competencies in the domains of counting, number knowledge, and visual-number representation in 73 children aged 6-11 years. Significant negative correlations between numerical performance in all of these areas and right and left hand 2D:4D ratios were found for boys but not girls. To the extent that 2D:4D ratios reflects prenatal exposure to T, the implications are (i) high prenatal T may be associated with better performance on some basic numerical measures for boys, and (ii) prenatal exposure to T may affect boys and girls differently with respect to some numerical competencies. 相似文献
224.
Hommel B Kessler K Schmitz F Gross J Akyürek E Shapiro K Schnitzler A 《Psychological research》2006,70(6):425-435
When people monitor a visual stream of rapidly presented stimuli for two targets (T1 and T2), they often miss T2 if it falls into a time window of about half a second after T1 onset-the attentional blink (AB). We provide an overview of recent neuroscientific studies devoted to analyze the neural processes underlying the AB and their temporal dynamics. The available evidence points to an attentional network involving temporal, right-parietal and frontal cortex, and suggests that the components of this neural network interact by means of synchronization and stimulus-induced desynchronization in the beta frequency range. We set up a neurocognitive scenario describing how the AB might emerge and why it depends on the presence of masks and the other event(s) the targets are embedded in. The scenario supports the idea that the AB arises from "biased competition", with the top-down bias being generated by parietal-frontal interactions and the competition taking place between stimulus codes in temporal cortex. 相似文献
225.
226.
Komischke B Giurfa M Lachnit H Malun D 《Learning & memory (Cold Spring Harbor, N.Y.)》2002,9(3):122-129
Honeybees Apis mellifera can associate an originally neutral odor with a reinforcement of sucrose solution. Forward pairings of odor and reinforcement enable the odor to release the proboscis extension reflex in consecutive tests. Bees can also be conditioned differentially: They learn to respond to a reinforced odor and not to a nonreinforced one. They can also learn to reverse their choice. Here we ask whether honeybees can learn successive olfactory differential conditioning tasks involving different overlapping pairs of odors. The conditioning schedules were established in order to train the animals with 3, 2, 1, or 0 reversals previous to a last differential conditioning phase in which two additional reversals were present. We studied whether or not successive reversal learning is possible and whether or not learning olfactory discrimination reversals affects the solving of subsequent discrimination reversals. Therefore we compared the responses of bees that had experienced reversals with those of bees that had not experienced such reversals when both are confronted with a new reversal situation. In experiment 1 we showed that bees that had experienced three previous reversals were better in solving the final reversal task than bees with no previous reversal experience. In experiment 2, we showed that one reversal learning is enough for bees to perform better in the final reversal task. The successive different reversals trained in our experiments resemble the natural foraging situation in which a honeybee forager has to switch successively from an initial floral species to different ones. The fact that experiencing such changes seems to improve a bee's performance in dealing with further new exploited food sources has therefore an adaptive impact for the individual and for the colony as a whole. 相似文献
227.
228.
When subjects switch between two tasks, performance is slower after a task switch than after a task repetition. We report five experiments showing that a large part of these "task-shift-costs" cannot be attributed to a control operation, needed to configure the cognitive system for the upcoming task (e.g., ). In all experiments subjects switched between picture-naming and word-reading. We presented different stimuli either in just one of the two tasks, or in both of them. Shift-costs were larger for stimuli presented in both tasks than for those presented in only one task, even after more than 100 intervening trials between prime and probe events. We suggest (as proposed by ) that stimuli acquire associations with the tasks in which they occur. When the current task activation is weak, as on a switch of tasks, stimuli can trigger retrieval of the associated, competing task, provoking larger time costs. 相似文献
229.
Brooke Burrows Özden Melis Uluğ Knar Khudoyan Bernhard Leidner 《Political psychology》2023,44(2):397-418
The current study examined the motivations and outcomes of the Armenian Velvet Revolution through the voice of 18 protesters with qualitative interviews, exploring their motivations for joining the collective action, their perceptions of its implementation, and resultant psychological changes. Participants distinguished between individual- and group-level processes and bypassed social divisions through a shared belief in the value of “Rejecting Serzh” (i.e., opposing then President Serzh Sargsyan). Results also illustrated a recursive process of collective action supporting the development of a new theoretical CARE (collective action recursive empowerment) model. The model understands successful social change as a function of both individual and group identity informing collective-action processes: Smaller acts of protest increase individual feelings of shared group identity and empowerment/efficacy beliefs, thus strengthening motivations for continued protest and making large-scale collective action achievable. By linking together multiple time points of a collective-action process in one recursive model, the current work maps out one specific case of successful collective action in recent history, which serves as a basis for broader theoretical generalization and future empirical research. 相似文献
230.
Bernhard Strauß 《Psychotherapeut》1999,44(6):383-384
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