CAN SIMPLE PEDAGOGICAL AGENT PROMOTE LEARNING? TEST THE IMAGE PRINCIPLE THROUGH CAREFUL DESIGN

2021 ◽  
Author(s):  
Tzu-Hsiang Peng ◽  
Tzu-Hua Wang
Keyword(s):  
Pedagogical Agent ◽  
Learning Test ◽  
Careful Design

A Stable Field Emission Electron Source

1977 ◽  
Vol 35 ◽  
pp. 58-59
Author(s):  
W.R. Bottoms ◽  
G.B. Haydon
Keyword(s):  
Field Emission ◽  
Signal To Noise Ratio ◽  
High Brightness ◽  
Electron Sources ◽  
Brightness Field ◽  
Current Densities ◽  
Properties Of Materials ◽  
Stable Field ◽  
Stable Current ◽  
Careful Design

There is great interest in improving the brightness of electron sources and therefore the ability of electron optical instrumentation to probe the properties of materials. Extensive work by Dr. Crew and others has provided extremely high brightness sources for certain kinds of analytical problems but which pose serious difficulties in other problems. These sources cannot survive in conventional system vacuums. If one wishes to gather information from the other signal channels activated by electron beam bombardment it is necessary to provide sufficient current to allow an acceptable signal-to-noise ratio. It is possible through careful design to provide a high brightness field emission source which has the capability of providing high currents as well as high current densities to a specimen. In this paper we describe an electrode to provide long-lived stable current in field emission sources.The source geometry was based upon the results of extensive computer modeling. The design attempted to maximize the total current available at a specimen.

Error Analysis in Neuropsychological Assessment of Verbal Memory and Learning

1995 ◽  
Vol 11 (1) ◽  
pp. 21-28 ◽  
Author(s):  
Dietmar Heubrock
Keyword(s):  
Error Analysis ◽  
Verbal Memory ◽  
Verbal Learning ◽  
Learning Disorders ◽  
Memory And Learning ◽  
Auditory Verbal Learning Test ◽  
Additional Information ◽  
Auditory Verbal Learning ◽  
Accurate Picture ◽  
Learning Test

Performance on a German version of the Rey Auditory-Verbal Learning Test (AVLT) was investigated for 64 juvenile patients who were subdivided in 6 clinical groups. In addition to standard evaluation of AVLT protocols which is usually confined to items recalled correctly, an error analysis was performed. Differentiating between total errors (TE), repetition errors (RE), and misnamings (ME), substantial differences between clinical groups could be demonstrated. It is argued that error analysis of verbal memory and learning enriches the understanding of neuropsychological syndromes, and provides additional information for diagnostic and clinical use. Thus, it is possible to gain a more accurate picture so that patients can be appropriately retrained, and research into the functional causes of memory and learning disorders can be intensified.

Pengaruh Model PjBL Terhadap Hasil Belajar Murid pada Mata Pelajaran Akidah Akhlak di Madrasah Ibtidaiyah

2020 ◽  
Vol 8 (01) ◽  
pp. 110-126
Author(s):  
Nashran Azizan ◽  
Rahmadani Tanjung
Keyword(s):  
Research Result ◽  
Control Group ◽  
Research Model ◽  
Control Group Design ◽  
Islamic School ◽  
Group Design ◽  
Quasi Experimental ◽  
Moral Lesson ◽  
Learning Test ◽  
Academic Year

This aimed to know the influence of PjBL model toward learning results of moral lessons in knowing the prophet and apostle in IV grade of Islamic School Padangsidimpuan Angkola Julu in academic year 2019/2020 by using PjBL and Direct Instruction model. The research model used Quasi-Experimental Design with None Quivalent Control-Group Design. The used instrument is the learning result test. Data analysis used t-Test. Research result showed (1) there is the influence of PjBL model toward student's learning test on moral lesson of knowing prophet and apostle material.

scholarly journals Differentiating Functional Cognitive Disorder from Early Neurodegeneration: A Clinic-Based Study

2021 ◽  
Vol 11 (6) ◽  
pp. 800
Author(s):  
Harriet A. Ball ◽  
Marta Swirski ◽  
Margaret Newson ◽  
Elizabeth J. Coulthard ◽  
Catherine M. Pennington
Keyword(s):  
Cognitive Abilities ◽  
Minnesota Multiphasic Personality Inventory ◽  
Verbal Learning ◽  
Cognitive Disorder ◽  
Control Group ◽  
Performance Validity ◽  
Immediate Recall ◽  
Trail Making ◽  
Learning Test ◽  
Validity Tests

Functional cognitive disorder (FCD) is a relatively common cause of cognitive symptoms, characterised by inconsistency between symptoms and observed or self-reported cognitive functioning. We aimed to improve the clinical characterisation of FCD, in particular its differentiation from early neurodegeneration. Two patient cohorts were recruited from a UK-based tertiary cognitive clinic, diagnosed following clinical assessment, investigation and expert multidisciplinary team review: FCD, (n = 21), and neurodegenerative Mild Cognitive Impairment (nMCI, n = 17). We separately recruited a healthy control group (n = 25). All participants completed an assessment battery including: Hopkins Verbal Learning Test-Revised (HVLT-R), Trail Making Test Part B (TMT-B); Depression Anxiety and Stress Scale (DASS) and Minnesota Multiphasic Personality Inventory (MMPI-2RF). In comparison to healthy controls, the FCD and nMCI groups were equally impaired on trail making, immediate recall, and recognition tasks; had equally elevated mood symptoms; showed similar aberration on a range of personality measures; and had similar difficulties on inbuilt performance validity tests. However, participants with FCD performed significantly better than nMCI on HVLT-R delayed free recall and retention (regression coefficient −10.34, p = 0.01). Mood, personality and certain cognitive abilities were similarly altered across nMCI and FCD groups. However, those with FCD displayed spared delayed recall and retention, in comparison to impaired immediate recall and recognition. This pattern, which is distinct from that seen in prodromal neurodegeneration, is a marker of internal inconsistency. Differentiating FCD from nMCI is challenging, and the identification of positive neuropsychometric features of FCD is an important contribution to this emerging area of cognitive neurology.

Inflammatory Markers May Inform the Effects of Electroconvulsive Therapy on Cognition in Patients with Depression

2021 ◽  
pp. 1-9
Author(s):  
Jan-Baptist Belge ◽  
Linda Van Diermen ◽  
Bernard Sabbe ◽  
Manuel Morrens ◽  
Violette Coppens ◽  
...  
Keyword(s):  
Episodic Memory ◽  
Cognitive Functioning ◽  
Electroconvulsive Therapy ◽  
Inflammatory Markers ◽  
Verbal Learning ◽  
Potential Biomarker ◽  
Tnf Α ◽  
Autobiographic Memory ◽  
Learning Test ◽  
Verbal Episodic Memory

<b><i>Introduction:</i></b> The neurobiological mechanisms underlying the acute cognitive effects of electroconvulsive therapy (ECT) remain poorly understood. Prior research has shown that proinflammatory cytokines such as IL-6, TNF-α, IL1-β, and IL-10 may interfere with cognitive functioning. Interestingly, immunomodulation is one of the proposed modes of action of ECT. This study investigates whether changes of peripheral levels of IL-6, TNF-α, IL1-β, and IL-10 are related to changes in cognitive functioning following ECT. <b><i>Methods:</i></b> In the week before and 1 week after an acute course of ECT, 62 patients suffering from depression underwent a neuropsychological evaluation to assess their processing speed using the Symbol Digit Substitution Test (SDST), verbal episodic memory using the Hopkins Verbal Learning Test-Revised (HVLT-R), and their retrospective autobiographic memory using the Autobiographical Memory Interview (AMI) with the peripheral inflammatory markers being measured at the same 2 time points. <b><i>Results:</i></b> Patients improved drastically following ECT, while their main performance on both the HVLT-R and AMI declined and their SDST scores remained stable. The levels of IL-6 and IL1-β had both decreased, where the decrease in IL-6 was related to the decrease in HVLT-R scores. Higher baseline IL-10 levels were associated with a more limited decrease of the HVLT-R scores. <b><i>Conclusion:</i></b> Our findings tentatively suggest that the effects of ECT on verbal episodic memory may be related to the treatment’s immunomodulatory properties, most notably due to decreased IL-6 levels. Moreover, baseline IL-10 appears to be a potential biomarker to predict the effects of ECT on verbal episodic memory. Whilst compelling, the results of this study should be interpreted with caution as, due to its exploratory nature, no correction for multiple comparisons was made. Further, a replication in larger cohorts is warranted.

scholarly journals Differential Cognitive Performance in Females and Males with Regular Cannabis Use

2021 ◽  
Vol 27 (6) ◽  
pp. 570-580
Author(s):  
Ashley M. Schnakenberg Martin ◽  
Deepak Cyril D’Souza ◽  
Sharlene D. Newman ◽  
William P. Hetrick ◽  
Brian F. O’Donnell
Keyword(s):  
Digit Span ◽  
Verbal Learning ◽  
Verbal Working Memory ◽  
Cannabis Use ◽  
Neurocognitive Deficits ◽  
Psychomotor Speed ◽  
High Concentration ◽  
Cognitive Measures ◽  
Biological Sex ◽  
Learning Test

AbstractObjectives:Preclinical and clinical studies suggest that males and females may be differentially affected by cannabis use. This study evaluated the interaction of cannabis use and biological sex on cognition, and the association between observed cognitive deficits and features of cannabis use.Methods:Cognitive measures were assessed in those with regular, ongoing, cannabis use (N = 40; 22 female) and non-using peers (N = 40; 23 female). Intelligence, psychomotor speed, and verbal working memory were measured with the Wechsler Abbreviated Scale of Intelligence, Digit Symbol Test, and Digit Span and Hopkins Verbal Learning Test, respectively. Associations between cognitive measures and cannabis use features (e.g., lifetime cannabis use, age of initiation, time since last use of cannabis, recent high-concentration tetrahydrocannabinoid exposure) were also evaluated.Results:No main effects of group were observed across measures. Significant interactions between group and biological sex were observed on measures of intelligence, psychomotor speed, and verbal learning, with greatest group differences observed between males with and without regular cannabis use. Psychomotor performance was negatively correlated with lifetime cannabis exposure. Female and male cannabis use groups did not differ in features of cannabis use.Conclusions:Findings suggest that biological sex influences the relationship between cannabis and cognition, with males potentially being more vulnerable to the neurocognitive deficits related to cannabis use.

scholarly journals Association of Anxiety Awareness with Risk Factors of Cognitive Decline in MCI

2021 ◽  
Vol 11 (2) ◽  
pp. 135
Author(s):  
Ariela Gigi ◽  
Merav Papirovitz
Keyword(s):  
Cognitive Decline ◽  
State Anxiety ◽  
Verbal Learning ◽  
Memory Loss ◽  
Control Group ◽  
General Tendency ◽  
General Anxiety ◽  
Auditory Verbal Learning ◽  
Skin Conductivity ◽  
Learning Test

Studies demonstrate that anxiety is a risk factor for cognitive decline. However, there are also study findings regarding anxiety incidence among people with mild cognitive impairment (MCI), which mostly examined general anxiety evaluated by subjective questionnaires. This study aimed to compare subjective and objective anxiety (using autonomic measures) and anxiety as a general tendency and anxiety as a reaction to memory examination. Participants were 50 adults aged 59–82 years who were divided into two groups: MCI group and control group, according to their objective cognitive performance in the Rey Auditory Verbal Learning Test. Objective changes in the anxiety response were measured by skin conductivity in all tests and questionnaires. To evaluate subjective anxiety as a reaction to memory loss, a questionnaire on “state-anxiety” was used immediately after completing memory tests. Our main finding was that although both healthy and memory-impaired participants exhibited elevations in physiological arousal during the memory test, only healthy participants reported an enhanced state anxiety (p = 0.025). Our results suggest that people with MCI have impaired awareness of their emotional state.

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