Person-Related Protective and Vulnerability Factors of Psychopathology Symptoms in Non-Clinical Adolescents

Psychopathology in youths is thought to originate from a dynamic interplay of a variety of protective and vulnerability factors. In this study, a large multi-ethnic sample of non-clinical adolescents (N = 376) completed questionnaires for measuring a wide range of person-related protective and vulnerability factors as well as psychopathology symptoms, in order to explore (a) the relations among various protective and vulnerability factors, and (b) the unique contributions of these protective and vulnerability factors to different types of psychological problems. Results indicated that the overlap among protective and vulnerability factors was quite modest. Further, it was found that factors clustered in theoretically meaningful components reflecting protection, vulnerability, and more specific aspects of coping and social support. Finally, data indicated that each type of psychopathology symptoms was associated with a typical set of protective and vulnerability factors. Although these results should be interpreted with caution because of the cross-sectional nature of the study, they may nevertheless guide future research exploring multifactorial models of psychopathology in youths

Psychological, social and somatic characteristics of women who clinically present as menorrhagic

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Self-perception profile of adolescent girls at a single-sex and a mixed-sex school

The aim of this study was to investigate the association between attendance at either a single- or a mixed-sex school and scores on the Self-Perception Profile for Children (Harter, 1985). Subjects included 143 Northern Irish adolescent girls from a single-sex secondary school in Belfast and 24 adolescent girls from a mixed-sex secondary school matched for location and religious affiliation. Results indicated that girls from the single-sex school were less happy than girls at the mixed-sex school with respect to their physical appearance, but more satisfied with their behavioral conduct. In addition, physical appearance was the best predictor of global self-worth for girls at the mixed-sex school, whereas behavioral conduct was the best predictor of global self-worth for girls at the single-sex school

Genotyping Strategies of Selection Candidates in Sheep Breeding Programs

Genotyping strategies for both ram and ewe selection candidates were investigated to maximise the benefit of genomic selection while minimising genotyping costs. Through stochastic simulation we investigated both early and late-stage genomic selection of rams using a selection index that contained an early in life measurement (post-weaning weight) and a hard to measure trait (intra-muscular fat) that was not measured on selection candidates. We also simulated genotyping strategies for female selection candidates in breeding programs using natural mating, multiple ovulation and embryo transfer (MOET) or juvenile in vitro fertilisation and embryo transfer (JIVET). Our results showed that genomic selection of rams lifted genetic gain by 40%. Genomic testing the top 20% of ram selection candidates achieved 80% of the maximum benefit using late-stage genomic selection, while testing 47% of the top ranked rams implementing early-stage genomic selection was required to achieve 80% of the benefit. Genetic gain lifted by a maximum of 15-65% for genomic testing in (only) ewe selection candidates. To achieve 80% of the maximum benefit of genomic selection, 65%, 35% and 45% of ewe selection candidates required genomic testing each year for natural, MOET and JIVET breeding programs, respectively. Genotyping ram selection candidates provided the best value for money