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31.
Alcohol abuse disrupts core executive functions, including working memory (WM)--the ability to maintain and manipulate goal-relevant information. When executive functions like WM are weakened, drinking behavior gets out of control and is guided more strongly by automatic impulses. This study investigated whether training WM restores control over drinking behavior. Forty-eight problem drinkers performed WM training tasks or control tasks during 25 sessions over at least 25 days. Before and after training, we measured WM and drinking behavior. Training WM improved WM and reduced alcohol intake for more than 1 month after the training. Further, the indirect effect of training on alcohol use through improved WM was moderated by participants' levels of automatic impulses: Increased WM reduced alcohol consumption in participants with relatively strong automatic preferences for alcohol. These findings are consistent with the theoretical framework and demonstrate that training WM may be an effective strategy to reduce alcohol use by increasing control over automatic impulses to drink alcohol. 相似文献
32.
Jarno Jansen Carolina de Weerth J. Marianne Riksen-Walraven 《Developmental Review》2008,28(4):503-521
A positive effect of breastfeeding on the mother–infant relationship is often assumed in the scientific literature, but this has not been systematically reviewed. This review aims to clarify the role of breastfeeding in the mother–infant relationship, which is conceptualized as the maternal bond toward the infant and infant attachment toward the mother. Our findings indicate that theoretical mechanisms through which breastfeeding may enhance the maternal bond or infant attachment (i.e., endocrine and sensory factors involved in breastfeeding) can be found in both humans and animal models. However, the few empirical studies investigating this association have not found convincing support for a relation between breastfeeding and the quality of the mother–infant relationship. We therefore conclude that assumptions on a positive role of breastfeeding on the mother–infant relationship are not supported by empirical evidence, and recommendation of breastfeeding should solely be based on its well-documented positive effects on infant and maternal health. 相似文献
33.
We investigated the development of code specific representations of different kinds of information in long term memory. Forty
second graders, 40 sixth graders and 40 adults learned the associations between 12 pictures and one position each in a 4 × 3
grid of squares, 12 pictures and 1 of 12 monosyllabic words each or 12 pictures and 1 of 12 faces. After a 3 min distractor
task, a picture was presented in the retrieval phase, and the associated position, word or face had to be selected. Performance
in the verbal condition improved as a function of age, while performance in the spatial condition turned out to be independent
of age, and the performance in the facial condition showed a difference between both child groups and the adults. The results
revealed a developmental difference of code specific representation of different kinds of information. 相似文献
34.
In contrast to Shultz and Takane [Shultz, T.R., & Takane, Y. (2007). Rule following and rule use in the balance-scale task. Cognition, in press, doi:10.1016/j.cognition.2006.12.004.] we do not accept that the traditional Rule Assessment Method (RAM) of scoring responses on the balance scale task has advantages over latent class analysis (LCA): RAM is similar to a very restricted form of LCA. The apparent shortcomings of LCA are also less severe than they suggest. Via new simulations we show that LCA detects small classes reliably. We also counter their concerns regarding the torque difference effect and we underline the problems connectionist models have with correctly responding to balance items. Despite these differences in opinion we agree with Shultz and Takane on the possible avenues for future research. 相似文献
35.
36.
In the standard Iowa Gambling Task (IGT), participants have to choose repeatedly from four options. Each option is characterized by a constant gain, and by the frequency and amount of a probabilistic loss. Crone and van der Molen (2004) reported that school-aged children and even adolescents show marked deficits in IGT performance. In this study, we have re-analyzed the data with a multivariate normal mixture analysis to show that these developmental changes can be explained by a shift from unidimensional to multidimensional proportional reasoning (Siegler, 1981; Jansen & van der Maas, 2002). More specifically, the results show a gradual shift with increasing age from (a) guessing with a slight tendency to consider frequency of loss to (b) focusing on frequency of loss, to (c) considering both frequency and amount of probabilistic loss. In the latter case, participants only considered options with low-frequency loss and then chose the option with the lowest amount of loss. Performance improved in a reversed task, in which punishment was placed up front and gain was delivered unexpectedly. In this reversed task, young children are guessing with already a slight tendency to consider both the frequency and amount of gain; this strategy becomes more pronounced with age. We argue that these findings have important implications for the interpretation of IGT performance, as well as for methods to analyze this performance. 相似文献
37.
Eddie M. W. Tong George D. Bishop Hwee Chong Enkelmann Yong Peng Why Siew Maan Diong Majeed Khader Jansen Ang 《Journal of personality》2009,77(4):1103-1136
ABSTRACT In light of the lack of studies examining the cognitive components of affective chronometry, this research examined the appraisals associated with emotion habituation, using anger as the emotion of focus. Anger and its appraisals were assessed repeatedly over a day in the participants' naturalistic contexts. The trajectory of decline in anger over time after its first appearance was found to be a function of chronic coping styles. More importantly, the trajectories of anger-related appraisals generally corresponded to that of anger and were also moderated by coping styles in ways consistent with the moderating effects of coping styles on anger. Implications of these results for affective chronometry research and for appraisal research are discussed. 相似文献
38.
For various domains in proportional reasoning cognitive development is characterized as a progression through a series of
increasingly complex rules. A multiplicative relationship between two task features, such as weight and distance information
of blocks placed at both sides of the fulcrum of a balance scale, appears difficult to discover. During development, children
change their beliefs about the balance scale several times: from a focus on the weight dimension (Rule I) to occasionally
considering the distance dimension (Rule II), guessing (Rule III), and applying multiplication (Rule IV; Siegler, 1981). Because
of the detailed empirical findings the balance scale task has become a benchmark task for computational models of proportional
reasoning.
In this article, we present a large empirical study (N = 420) of which the findings provide a challenge for computational models. The effect of feedback and the effect of individually
adapted training items on rule transition were tested for children using Rule I or Rule II. Presenting adapted training items
initiates belief revision for Rule I but not for Rule II. The experience of making mistakes (by providing feedback) induces
a change for both Rule I and Rule II. However, a delayed posttest shows that these changes are preserved after 2 weeks only
for children using Rule I. We conclude that the transition from Rule I to Rule II differs from the transition from Rule II
to a more complex rule. Concerning these empirical findings, we will review performance of computational models and the implications
for a future belief revision model.
It is one Thing, to show a Man that he is in an Error, and another, to put him in possession of Truth. John Locke相似文献
39.
Consideration will be given to a model developed by Rasch that assumes scores observed on some types of attainment tests can
be regarded as realizations of a Poisson process. The parameter of the Poisson distribution is assumed to be a product of
two other parameters, one pertaining to the ability of the subject and a second pertaining to the difficulty of the test.
Rasch's model is expanded by assuming a prior distribution, with fixed but unknown parameters, for the subject parameters.
The test parameters are considered fixed. Secondly, it will be shown how additional between- and within-subjects factors can
be incorporated. Methods for testing the fit and estimating the parameters of the model will be discussed, and illustrated
by empirical examples. 相似文献
40.
Karl L. R. Jansen 《Journal of Near-Death Studies》1997,16(1):5-26
Near-death experiences (NDEs) can be reproduced by ketamine via blockade of receptors in the brain for the neurotransmitter glutamate, the N-methyl-D-aspartate (NMDA) receptors. Conditions that precipitate NDEs, such as hypoxia, ischemia, hypoglycemia, and temporal lobe epilepsy, have been shown to release a flood of glutamate, overactivating NMDA receptors and resulting in neurotoxicity. Ketamine prevents this neurotoxicity. There are substances in the brain that bind to the same receptor site as ketamine. Conditions that trigger a glutamate flood may also trigger a flood of neuroprotective agents that bind to NMDA receptors to protect cells, leading to an altered state of consciousness like that produced by ketamine. 相似文献