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221.
Subjective measures of awareness rest on the assumption that conscious knowledge is knowledge that participants know they possess. Post-Decision Wagering (PDW), recently proposed as a new measure of awareness, requires participants to place a high or a low wager on their decisions. Whereas advantageous wagering indicates awareness of the knowledge on which the decisions are based, cases in which participants fail to optimize their wagers suggest performance without awareness. Here, we hypothesize that wagering and other subjective measures of awareness reflect metacognitive capacities subtended by self-developed metarepresentations that inform an agent about its own internal states. To support this idea, we present three simulations in which neural networks learn to wager on their own responses. The simulations illustrate essential properties that are required for such metarepresentations to influence PDW as a measure of awareness. Results demonstrate a good fit to human data. We discuss the implications of this modeling work for our understanding of consciousness and its measures. 相似文献
222.
Axel Gelfert 《国际科学哲学研究》2003,17(3):245-263
In its original form due to Ian Hacking, entity realism postulates a criterion of manipulative success which replaces explanatory virtue as the criterion of justified scientific belief. The article analyses the foundations on which this postulate rests and identifies the conditions on which one can derive a form of entity realism from it. It then develops in detail an extensive class of counterexamples, drawing on the notion of quasi-particles in condensed matter physics. While the phenomena associated with quasi-particles pass the entity realist's criterion of manipulative success, quasi-particles themselves are illusions, and can be seen to be so even on the basis of the largely non-theoretical “home truths” that one must be ready to admit as background knowledge. Hence, Hacking's entity realism is shown to be incoherent. 相似文献
223.
Buchner, Erdfelder, Steffens, and Martensen (1997) proposed that the memory processes involved in recognition judgments in the process dissociation procedure are the same as those involved in standard source monitoring tasks. Two extensions of that research are presented here. First, following a line of reasoning recently brought forward by Jacoby (1998), the instructions in the earlier study could have triggered different processes from those triggered by his instructions. However, with instructions conforming as closely as possible to those reported by Jacoby (1991), Experiment 1 replicated the earlier recognition judgment finding almost perfectly. Second, the memory processes underlying fame judgments in the process dissociation procedure could also resemble those involved in source monitoring tasks. Indeed, the results of Experiment 2 are compatible with the hypothesis that the same processes are involved in fame judgments given a source monitoring or a process dissociation procedure. 相似文献
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225.
Contextual modulation of prime response retrieval processes: Evidence from auditory negative priming
Contextual similarity between learning and test phase has been shown to be beneficial for memory retrieval. Negative priming is known to be caused by multiple processes; one of which is episodic retrieval. Therefore, the contextual similarity of prime and probe presentations should influence the size of the negative priming effect. This has been shown for the visual modality. In Experiment 1, an auditory four-alternative forced choice reaction time task was used to test the influence of prime-probe contextual similarity on negative priming and the processes underlying the modulation by context. The negative priming effect was larger when the auditory context was repeated than when it was changed from prime to probe. The modulation by context was exclusively caused by an increase in prime response retrieval errors in ignored repetition trials with context repetition, whereas repeating only the context but not the prime distractor did not lead to an increase in prime response retrieval. This exact pattern of results was replicated in Experiment 2. The findings suggest that contextual information is integrated with prime distractor and response information. Retrieval of the previous episode, including prime distractor, prime response, and context (event file), can be triggered when the former prime distractor is repeated, whereas a context cue alone does not retrieve the event file. This suggests an event file structure that is more complicated than its usually assumed binary structure. 相似文献
226.
Axel Buchner Joachim Funke Dianne C. Berry 《The Quarterly Journal of Experimental Psychology Section A: Human Experimental Psychology》1995,48(1):166-187
Negative correlations between task performance in dynamic control tasks and verbalizable knowledge, as assessed by a post-task questionnaire, have been interpreted as dissociations that indicate two antagonistic modes of learning, one being “explicit”, the other “implicit”. This paper views the control tasks as finite-state automata and offers an alternative interpretation of these negative correlations. It is argued that “good controllers” observe fewer different state transitions and, consequently, can answer fewer post-task questions about system transitions than can “bad controllers”. Two experiments demonstrate the validity of the argument by showing the predicted negative relationship between control performance and the number of explored state transitions, and the predicted positive relationship between the number of explored state transitions and questionnaire scores. However, the experiments also elucidate important boundary conditions for the critical effects. We discuss the implications of these findings, and of other problems arising from the process control paradigm, for conclusions about implicit versus explicit learning processes. 相似文献
227.
The role of habituation and attentional orienting in the disruption of short-term memory performance
A series of experiments explored habituation and dishabituation to repeated auditory distractors. Participants memorised lists
of visually presented items in silence or while ignoring continuously presented auditory distractors. No habituation could
be observed, in that the size of the auditory distractor effect did not decrease during the experiment. However, there was
evidence for attentional orienting when novel auditory material was presented after a long period of repetitive stimulation,
in that a change of distractors was associated with a temporary decrease in recall performance. The results are most consistent
with theoretical accounts that claim that the auditory distractor effect is caused primarily by automatic interference, but
that still allow attention to play a limited role in the short-term maintenance of information. 相似文献
228.
Axel Buchner 《The Quarterly Journal of Experimental Psychology Section A: Human Experimental Psychology》1996,49(3):765-779
Two experiments that tested whether semantic similarity between visually presented targets and auditorily presented distractors has an effect on serial recall of the visual targets are reported. In Experiment 1, we found no difference in the recall of two-digit numbers when distractors were either numbers or words and non-words that were designed to be phonologically similar to the targets. In Experiment 2 the 'semantic distance' between targets and distractors had no effect on serial recall. Taken together, these experiments conceptually replicate and extend earlier results, and they establish constraints for models of the effect of unattended acoustic information on serial recall. 相似文献
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230.