scholarly journals Kuroda et al. Optimization of Self-Reference Thermometry using Complex Field Estimation, Magn Reson Med 2006;56:835-843

2007 ◽  
Vol 57 (4) ◽  
pp. 812-812
Keyword(s):  
Complex Field ◽  
Field Estimation ◽  
Self Reference

Optimization of self-reference thermometry using complex field estimation

2006 ◽  
Vol 56 (4) ◽  
pp. 835-843 ◽  
Author(s):  
Kagayaki Kuroda ◽  
Daisuke Kokuryo ◽  
Etsuko Kumamoto ◽  
Kyohei Suzuki ◽  
Yuichiro Matsuoka ◽  
...  
Keyword(s):  
Complex Field ◽  
Field Estimation ◽  
Self Reference

Identifying Patterns in Complex Field Data

2017 ◽  
Vol 225 (3) ◽  
pp. 268-284 ◽  
Author(s):  
Andrew J. White ◽  
Dieter Kleinböhl ◽  
Thomas Lang ◽  
Alfons O. Hamm ◽  
Alexander L. Gerlach ◽  
...  
Keyword(s):  
Heart Rate ◽  
Panic Disorder ◽  
Latent Class ◽  
Treatment Protocol ◽  
Situational Factors ◽  
Self Report ◽  
Complex Field ◽  
Cluster Assignment ◽  
Experimental Conditions ◽  
Conventional Analysis

Abstract. Ambulatory assessment methods are well suited to examine how patients with panic disorder and agoraphobia (PD/A) undertake situational exposure. But under complex field conditions of a complex treatment protocol, the variability of data can be so high that conventional analytic approaches based on group averages inadequately describe individual variability. To understand how fear responses change throughout exposure, we aimed to demonstrate the incremental value of sorting HR responses (an index of fear) prior to applying averaging procedures. As part of their panic treatment, 85 patients with PD/A completed a total of 233 bus exposure exercises. Heart rate (HR), global positioning system (GPS) location, and self-report data were collected. Patients were randomized to one of two active treatment conditions (standard exposure or fear-augmented exposure) and completed multiple exposures in four consecutive exposure sessions. We used latent class cluster analysis (CA) to cluster heart rate (HR) responses collected at the start of bus exposure exercises (5 min long, centered on bus boarding). Intra-individual patterns of assignment across exposure repetitions were examined to explore the relative influence of individual and situational factors on HR responses. The association between response types and panic disorder symptoms was determined by examining how clusters were related to self-reported anxiety, concordance between HR and self-report measures, and bodily symptom tolerance. These analyses were contrasted with a conventional analysis based on averages across experimental conditions. HR responses were sorted according to form and level criteria and yielded nine clusters, seven of which were interpretable. Cluster assignment was not stable across sessions or treatment condition. Clusters characterized by a low absolute HR level that slowly decayed corresponded with low self-reported anxiety and greater self-rated tolerance of bodily symptoms. Inconsistent individual factors influenced HR responses less than situational factors. Applying clustering can help to extend the conventional analysis of highly variable data collected in the field. We discuss the merits of this approach and reasons for the non-stereotypical pattern of cluster assignment across exposures.

Self-Reference in Recognition Memory Among Severe Alzheimer's Patients

2000 ◽  
Author(s):  
Jennifer Gross ◽  
Thomas R. Herzog ◽  
Senez Rodriguez-Carbonier ◽  
Mary Harmon ◽  
Natalie Kay ◽  
...  
Keyword(s):  
Recognition Memory ◽  
Self Reference

Magnetic field estimation

1956 ◽  
Vol 26 (104) ◽  
pp. 240
Author(s):  
G.D. Stairmand
Keyword(s):  
Magnetic Field ◽  
Field Estimation
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