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1. Age limits on Middle Pleistocene glacial sediments from OSL dating, north Norfolk, UK

Author

Pawley, S.M., Bailey, R.J., Rose, J., Moorlock, Brian, Hamblin, R., Booth, Stephen, Lee, Jonathan, Pawley, S.M., Bailey, R.J., Rose, J., Moorlock, Brian, Hamblin, R., Booth, Stephen, and Lee, Jonathan

Abstract

The lowland region of north Norfolk contains some of the best preserved evidence for glacial deposition during the Middle Pleistocene in northwest Europe. Despite the importance of these deposits, there is limited chronological control and it is debated whether they belong to a single glaciation, equated to the Anglian Glaciation (Marine Isotope Stage 12), or represent deposition over a number of Middle Pleistocene cold stages. In order to develop an improved chronology for glaciation in this region, we obtained 18 samples for optical stimulated luminescence (OSL) dating from glacial outwash facies. Samples of coarse-grained quartz sand were measured using the SAR (single aliquot regenerative-dose) protocol. The low radioactive isotope concentrations in sediments of this region enable the traditionally accepted age limit of luminescence dating to be extended. The form of the dose response curves, pre-heat plateaux tests, and dose recovery experiments also indicate that laboratory doses can be reliably measured in these samples. Age overestimation due to partial bleaching is thought to be insignificant. The OSL ages suggest that the glacial sediments studied were deposited during MIS 12 rather than in different post MIS 12 stages.

Published
2008

3. Development and Psychometric Evaluation of the Children's Yale-Brown Obsessive-Compulsive Scale Second Edition.

Author

Storch EA, McGuire JF, Wu MS, Hamblin R, McIngvale E, Cepeda SL, Schneider SC, Rufino KA, Rasmussen SA, Price LH, and Goodman WK

Subjects
Adolescent, Child, Humans, Psychometrics instrumentation, Psychometrics methods, Reproducibility of Results, Obsessive-Compulsive Disorder diagnosis, Psychiatric Status Rating Scales standards, Psychometrics standards
Abstract

Objective: To develop and examine the psychometric properties of the Children's Yale-Brown Obsessive-Compulsive Scale Second Edition (CY-BOCS-II) in children and adolescents with obsessive-compulsive disorder (OCD)., Method: Youth with OCD (N = 102; age range 7-17 years), who were seeking treatment from 1 of 2 specialty OCD treatment centers, participated in the study. The CY-BOCS-II was administered at an initial assessment, and measures of OCD symptom severity, anxiety and depressive symptoms, behavioral and emotional problems, and global functioning were administered. Inter-rater and test-retest reliabilities were assessed on a subsample of participants (n = 50 and n = 31, respectively) approximately 1 week after intial assessment., Results: The CY-BOCS-II demonstrated moderate-to-strong internal consistency (α = 0.75-0.88) and excellent inter-rater (intraclass correlation coefficient = 0.86-0.92) and test-retest (intraclass correlation coefficient = 0.95-0.98) reliabilities across all scales. Construct validity was supported by strong correlations with clinician-rated measures of OCD symptom severity and moderate correlations with measures of anxiety symptoms. Exploratory factor analysis showed a 2-factor structure, which was generally inconsistent with its adult counterpart, the Yale-Brown Obsessive-Compulsive Scale Second Edition., Conclusion: Initial findings support the CY-BOCS-II as a reliable and valid measure of obsessive-compulsive symptoms in youth., (Copyright © 2018 American Academy of Child and Adolescent Psychiatry. Published by Elsevier Inc. All rights reserved.)

Published
2019
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