This paper presents a dynamic tree-based item response (IRTree) model as a novel extension of the autoregressive generalized linear mixed effect model (dynamic GLMM). We illustrate the unique utility of the dynamic IRTree model in its capability of modeling differentiated processes indicated by intensive polytomous time-series eye-tracking data. The dynamic IRTree was inspired by but is distinct from the dynamic GLMM which was previously presented by Cho, Brown-Schmidt, and Lee (Psychometrika 83(3):751–771, 2018). Unlike the dynamic IRTree, the dynamic GLMM is suitable for modeling intensive binary time-series eye-tracking data to identify visual attention to a single interest area over all other possible fixation locations. The dynamic IRTree model is a general modeling framework which can be used to model change processes (trend and autocorrelation) and which allows for decomposing data into various sources of heterogeneity. The dynamic IRTree model was illustrated using an experimental study that employed the visual-world eye-tracking technique. The results of a simulation study showed that parameter recovery of the model was satisfactory and that ignoring trend and autoregressive effects resulted in biased estimates of experimental condition effects in the same conditions found in the empirical study.
The purpose of this study was to determine whether common geriatric conditions, family function, and nutritional problems have independent associations with functional dependence beyond the effect of cognitive impairment in patients with Alzheimer's disease. It was found that some common geriatric conditions affecting patients with Alzheimer's disease appear to have multiple and differential relationships with specific instrumental activities of daily living (IADLs) dependency. These results have implications for medical care. Preventing one condition may not be sufficient to prevent further IADL dependences because the conditions are independently related to individual outcome variables. Thus, multiple conditions may need to be managed concurrently if further functional dependence is to be expected. 相似文献
Lesion studies show that the intermediate medial hyperstriatum ventrale (IMHV), a forebrain visual association area in chicks, is involved in learning and memory for one-trial passive avoidance and imprinting. We examined the effects of IMHV lesions in a one-trial, nongustatory, sickness-conditioned learning task. This task is similar to passive avoidance and imprinting because all three tasks require the chick to remember visual cues in order to respond correctly. However, sickness-conditioned learning differs from imprinting and passive avoidance because it uses sickness as the aversive stimulus and there is a longer conditioned stimulus-unconditioned stimulus interval (30-min delay compared to seconds). Bilateral IMHV lesions given 24 h before training impaired the ability of the chicks to avoid a bead associated with sickness produced by lithium chloride injection, as did pretraining unilateral left or right IMHV lesions. Post-training IMHV lesions given 1 h after training did not impair avoidance of the test bead in the sickness-conditioned learning task. However, lesioned chicks showed generalized avoidance of all test beads. The pretraining lesion results are similar to those found in imprinting and passive avoidance learning; however, the effects of unilateral IMHV lesions differed. Post-training lesion effects are similar to those found in passive avoidance learning. We propose that both left and right IMHV are necessary for sickness-conditioned learning and that post-training IMHV lesions impair the ability of the chick to learn or remember the association between the color of the bead and the aversive consequences of LiCl injection. 相似文献
Latino consumers in the United States reached a collective buying power of nearly $1.72 trillion in 2020 with over 22% between the ages of 18 and 37, and 80% of the population on the internet. Although Latino Millennials represent a significant consumer group in the United States, scarce literature has examined their online shopping orientations. Furthermore, despite having indications that Millennials are not a homogenous consumer group, and differ in their shopping preferences, studies fell short in examining the online shopping orientations of the Millennial subgroup. Thus, the purpose of this study was to examine the shopping orientations of Latino consumers by segmenting the Millennial generation into three groups: younger Millennial (18–23), middle Millennial (24–30), and older Millennial (31–37). The study administered a web-based questionnaire survey to a convenience sample of 378 participants. A one-way multivariate analysis of variance (MANOVA) was conducted, and findings revealed that shopping orientations of Latino consumers differ significantly based on Millennial generational cohorts (MGCs) and ethnicity. Among Latino MGCs, younger Millennials were more brand-and fashion-conscious, impulsive, and confused by over choice. Furthermore, Latino Millennials were more brand conscious than Caucasian Millennials. Therefore, companies and marketers that target Latino Millennial consumers should create shopping experiences that meet the needs of the different generational cohorts. 相似文献
Building on signaling theory, the current research proposes an empirical framework to help firms understand the degree to which cross-category purchases affect the revenue generated for each category and how within-category purchases influence the cross-category spillover effects. The framework is applied to novel individual-level, cross-sectional, and time-series transaction details from a leading lifestyle conglomerate in the Middle East. The empirical results provide strong support for the presence of revenue spillover across multiple categories of brand extensions, with the spillover being more pronounced in categories in which customers have infrequently purchased and thus had less within-category experience. These results add to the ongoing stream of research on brand extensions by offering evidence that both within- and cross-category learning play a significant role in revenue generation from brand extensions for multi-product or service firms. 相似文献
This study investigated variables related to the perceived multicultural counseling competence (MCC) of South Korean counselors. The relationship between perceived MCC and demographic information was explored, and effects of openness to experience, general counseling competence, and multicultural counseling education/practice on perceived MCC were examined. Results revealed no relationship with demographic information and perceived MCC and significant effects of general counseling competence and multucultural counseling education/practice on perceived MCC. Implications for multicultural counseling training and future research are discussed. 相似文献
This literature review highlights the benefits of participating in a doctoral writing group, with specific emphasis on how these learning communities foster reflective practice skills development. In particular, this review proposes that the process of continuous peer feedback and discussion benefits students by helping them verbalise their internal reflective thinking, fostering reflective practice skills development through various authentic learning experiences. Consequently, this review highlights the importance of establishing and supporting doctoral writing groups to further develop doctoral students’ personal epistemology, growth and professional practice. 相似文献
A Stroop task with separate color bar and color word stimuli was combined with an inhibition-of-return procedure to examine
whether visual attention modulates color word processing. In Experiment 1, the color bar was presented at the cued location
and the color word at the uncued location, or vice versa, with a 100- or 1,050-msec stimulus onset asynchrony (SOA) between
cue and Stroop stimuli. In Experiment 2, on Stroop trials, the color bar was presented at a central fixated location and the
color word at a cued or uncued location above or below the color bar. In both experiments, with a 100-msec SOA, the Stroop
effect was numerically larger when the color word was displayed at the cued location than when it was displayed at the uncued
location, but with the 1,050-msec SOA, this relation between Stroop effect magnitude and location was reversed. These results
provide evidence that processing of the color word in the Stroop task is modulated by the location to which visual attention
is directed. 相似文献
Three experiments tested whether the Stroop color-naming effect is a consequence of word recognition's being automatic or of the color word's capturing visual attention. In Experiment 1, a color bar was presented at fixation as the color carrier, with color and neutral words presented in locations above or below the color bar; Experiment 2 was similar, except that the color carrier could occur in one of the peripheral locations and the color word at fixation. The Stroop effect increased as display duration increased, and the Stroop dilution effect (a reduced Stroop effect when a neutral word is also present) was an approximately constant proportion of the Stroop effect at all display durations, regardless of whether the color bar or color word was at fixation. In Experiment 3, the interval between the onsets of the to-be-named color and the color word was manipulated. The Stroop effect decreased with increasing delay of the color word onset, but the absolute amount of Stroop dilution produced by the neutral word increased. This study's results imply that an attention shift from the color carrier to the color word is an important factor modulating the size of the Stroop effect. 相似文献
Oroxylin A is a flavonoid and was originally isolated from the root of Scutellaria baicalensis Georgi., one of the most important medicinal herbs in traditional Chinese medicine. The aim of this study was to investigate the ameliorating effects of oroxylin A on memory impairment using the passive avoidance test, the Y-maze test, and the Morris water maze test in mice. Drug-induced amnesia was induced by administering scopolamine (1 mg/kg, i.p.) or diazepam (1 mg/kg, i.p.). Oroxylin A (5 mg/kg) significantly reversed cognitive impairments in mice by passive avoidance and the Y-maze testing (P<.05). Oroxylin A also improved escape latencies in training trials and increased swimming times and distances within the target zone of the Morris water maze (P<.05). Moreover, the ameliorating effects of oroxylin A were antagonized by both muscimol and diazepam (0.25 mg/kg, i.p., respectively), which are GABA(A) receptor agonists. Furthermore, oroxylin A (100 microM) was found to inhibit GABA-induced inward Cl(-) current in a single cortical neuron. These results suggest that oroxylin A may be useful for the treatment of cognitive impairments induced by cholinergic dysfunction via the GABAergic nervous system. 相似文献