scholarly journals A-43 Factorial Relationships Among Copy and Memory Trials of the Benton Visual Retention Test

2019 ◽  
Vol 34 (6) ◽  
pp. 902-902
Author(s):  
M Gukasyan ◽  
c Bhowmick ◽  
J Moses
Keyword(s):  
Principal Component Analysis ◽  
Cognitive Processes ◽  
Retention Test ◽  
Principal Component ◽  
Size Distortion ◽  
Exclusion Criteria ◽  
Error Type ◽  
Medical Diagnoses ◽  
Error Factor ◽  
Benton Visual Retention Test

Abstract Objective We investigated the factorial relationships among categorical error groups on the Benton Visual Retention Test (BVRT) copy and memory trials. Methods A sample of 523 ambulatory American Veteran patients who presented for clinical evaluation with a wide variety of mixed neuropsychiatric diagnoses and general medical diagnoses were studied. There were no demographic or diagnostic exclusion criteria. Results Frequency summary scores for the six types of BVRT errors (omission, misplacement, size, distortion, perseveration, and rotation errors) were factored jointly by means of principal component analysis. Omission, misplacement, and size errors grouped factorially across copy and memory domains by error type. Results showed the factorial relationships are primarily defined by the type of error. Omission, size, and misplacement errors were grouped together regardless of whether they occurred on copy or memory trials. Rotation, distortion, and perseveration errors were factorially grouped on both the copy and memory trials, but the groupings of these similar error groups formed independent factors for the copy and memory trials. The copy error factor explained the most variance and the memory error factor o explained the least variance. Conclusions Omission, size, and misplacement errors on the BVRT copy and memory trials appear to be due to similar encoding process errors. Distortion, rotation, and perseveration errors on the BVRT copy and memory trials are related to each other within each trial type but different cognitive processes account for errors of this kind on the copy and memory trials.

scholarly journals A-44 Categorical Errors on the Benton Visual Retention Test are Systemically Related to Specific Factorial Components of Intelligence

2019 ◽  
Vol 34 (6) ◽  
pp. 903-903
Author(s):  
M Gukasyan ◽  
J Moses ◽  
K Greenman
Keyword(s):  
Principal Component ◽  
Memory Errors ◽  
Medical Problems ◽  
Error Type ◽  
Cognitive Domains ◽  
Nonverbal Memory ◽  
Benton Visual Retention Test ◽  
Systematic Relationships ◽  
Relationship Of ◽  
The Relationship

Abstract Objective We investigated the factorial relationship of the six categories of memory errors of the BVRT to the four factorial variables of the WAIS to determine the relationship between cognitive and nonverbal memory variables. Methods A sample of 134 diagnostically mixed ambulatory American Veteran patients with a wide variety of mixed neuropsychiatric diagnoses and with or without general medical problems who had completed the WAIS-3, and the BVRT were examined. There were no demographic or diagnostic exclusion criteria. Results The 6 types of BVRT memory errors (omissions, distortions, perseverations, rotations, misplacements, and size errors) were factored using principal component analysis. The four WAIS 3 and six BVRT components were jointly factored to examine for systematic relationships between memory and cognitive domains. The analysis identified specific factorial relationships of BVRT error type to each of the four factorial components of the WAIS. POI was related to rotation errors, VCI was related to size errors, PSI specifically related to omissions and WMI to distortions. Misplacement and perseveration errors were related to each other but not to factorial constructs of the WAIS. Conclusions There are specific and robust relationships among BVRT errors and dimensional cognitive variables.

A-45 Systematic Relationships of the Benton Visual Retention Test to Intelligence, Language and Demographics

2019 ◽  
Vol 34 (6) ◽  
pp. 904-904
Author(s):  
M Gukasyan ◽  
J Moses
Keyword(s):  
Educational Level ◽  
Demographic Variables ◽  
Exclusion Criteria ◽  
Factor Solution ◽  
Nonverbal Memory ◽  
Medical Diagnoses ◽  
Benton Visual Retention Test ◽  
Group A ◽  
Systematic Relationships ◽  
New Variables

Abstract Objective We investigated the factorial relationships of WAIS 3, BVRT, Visual Naming and demographic variables to better understand factorial relationships among those variables. Methods A sample of 126 ambulatory American Veteran patients who presented for clinical evaluation with a wide variety of mixed neuropsychiatric diagnoses and general medical diagnoses were studied. There were no demographic or diagnostic exclusion criteria. Results Our first analysis demonstrated robust independent relationships of age to a late occurring BVRT item group and education to an early occurring BVRT item group. A two factor solution for the items of the multilingual aphasia exam visual naming subtest from previous research showed systematic and robust relationships of one visual naming factor to VCI and the other visual naming factor to PSI only. Factor scales were computed to represent the orthogonal factors for the new variables in each of these analyses. Factor scales from the first two analyses were factored together to produce a four-part solution that explained 86% of the variance. POI was related to the late BVRT item group and age. The early BVRT item grouping was related to educational level, VCI, PSI and both visual naming components. WMI was independent of demographic, linguistic and BVRT variables. Conclusions There are factorial relationships between factorial components of nonverbal memory, intelligence, naming and demographic variables.

Scanning x-ray fluorescence microscopy and principal component analysis

1992 ◽  
Vol 50 (2) ◽  
pp. 1752-1753
Author(s):  
Brian Cross
Keyword(s):  
Principal Component Analysis ◽  
Fluorescence Microscopy ◽  
Spatial Resolution ◽  
High Speed ◽  
Image Acquisition ◽  
Principal Component ◽  
Fluorescence Microscope ◽  
Acquisition Rate ◽  
X Ray ◽  
Speed Up

A relatively new entry, in the field of microscopy, is the Scanning X-Ray Fluorescence Microscope (SXRFM). Using this type of instrument (e.g. Kevex Omicron X-ray Microprobe), one can obtain multiple elemental x-ray images, from the analysis of materials which show heterogeneity. The SXRFM obtains images by collimating an x-ray beam (e.g. 100 μm diameter), and then scanning the sample with a high-speed x-y stage. To speed up the image acquisition, data is acquired "on-the-fly" by slew-scanning the stage along the x-axis, like a TV or SEM scan. To reduce the overhead from "fly-back," the images can be acquired by bi-directional scanning of the x-axis. This results in very little overhead with the re-positioning of the sample stage. The image acquisition rate is dominated by the x-ray acquisition rate. Therefore, the total x-ray image acquisition rate, using the SXRFM, is very comparable to an SEM. Although the x-ray spatial resolution of the SXRFM is worse than an SEM (say 100 vs. 2 μm), there are several other advantages.

A German version of the Intermittent Claudication Questionnaire (ICQ): cultural adaptation and validation

VASA ◽  
2012 ◽  
Vol 41 (5) ◽  
pp. 333-342 ◽  
Author(s):  
Kirchberger ◽  
Finger ◽  
Müller-Bühl
Keyword(s):  
Principal Component Analysis ◽  
Intermittent Claudication ◽  
Completion Time ◽  
Short Form ◽  
Principal Component ◽  
Component Analysis ◽  
German Version ◽  
Average Completion Time ◽  
Sf 36 ◽  
Related Quality

Background: The Intermittent Claudication Questionnaire (ICQ) is a short questionnaire for the assessment of health-related quality of life (HRQOL) in patients with intermittent claudication (IC). The objective of this study was to translate the ICQ into German and to investigate the psychometric properties of the German ICQ version in patients with IC. Patients and methods: The original English version was translated using a forward-backward method. The resulting German version was reviewed by the author of the original version and an experienced clinician. Finally, it was tested for clarity with 5 German patients with IC. A sample of 81 patients were administered the German ICQ. The sample consisted of 58.0 % male patients with a median age of 71 years and a median IC duration of 36 months. Test of feasibility included completeness of questionnaires, completion time, and ratings of clarity, length and relevance. Reliability was assessed through a retest in 13 patients at 14 days, and analysis of Cronbach’s alpha for internal consistency. Construct validity was investigated using principal component analysis. Concurrent validity was assessed by correlating the ICQ scores with the Short Form 36 Health Survey (SF-36) as well as clinical measures. Results: The ICQ was completely filled in by 73 subjects (90.1 %) with an average completion time of 6.3 minutes. Cronbach’s alpha coefficient reached 0.75. Intra-class correlation for test-retest reliability was r = 0.88. Principal component analysis resulted in a 3 factor solution. The first factor explained 51.5 of the total variation and all items had loadings of at least 0.65 on it. The ICQ was significantly associated with the SF-36 and treadmill-walking distances whereas no association was found for resting ABPI. Conclusions: The German version of the ICQ demonstrated good feasibility, satisfactory reliability and good validity. Responsiveness should be investigated in further validation studies.

Short Form of the Benton Visual-Retention Test

2010 ◽  
Author(s):  
Margaret M. Lyon ◽  
Alyssa Marchetti ◽  
Steven Anderson ◽  
Natalie Denburg
Keyword(s):  
Retention Test ◽  
Short Form ◽  
Benton Visual Retention Test
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