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- Chuang, S.S., et al.
(författare)
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Internal Reliability, Temporal Stability, and Correlates of Individual Differences in Paternal Involvement: A 15-year Longitudinal Study in Sweden
- 2004
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Ingår i: Conceptualizing and Measuring Father Involvement. - Erlbaum : Mahwah: Lawrence Erlbaum. - 0805843590
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- The Swedish study began in 1981-2, with 6 waves of data collection. The participants were 144 Swedish families and their first-born children (70 girls) who averaged 16 months of age. This chapter focuses on the first 6 phases, when the children averaged 1, 2, 3, 7, 8 and 15 years of age. The issues that will be presented are on the stabilities of the various dimensions of father involvement over time and the possible factors that may influence their levels of involvement.
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| 2. |
- Chuang, S. S., et al.
(författare)
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Paternal leave and paternal involvement in Sweden
- 2003
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Ingår i: The biennial meeting of Society for Research in Child Development, Tampa, FL, April 24-27, 2003.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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| 3. |
- Chuang, S.S., et al.
(författare)
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Swedish adolescents’ relational and assertive self-concepts across social contexts and relationships.
- 2004
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Ingår i: Poster presented to the American Psychological Society Annual Convention, Chicago, May 28, 2004..
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Konferensbidrag (refereegranskat)abstract
- Participants were 118 15-year –old Swedish adolescents who rated themselves on assertive and relational traits across various types of roles and relationships (e.g., as a boy/girl, with peers, parents). Analysis revealed that the adolescents’ relational and assertive ratings were context-dependent. Girls’ relational and assertive scores were independent of each other whereas boys’ relational and assertive scores were negatively related for some types of relationships. These findings underscore that traits have greater variability across social contexts than by gender.
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| 8. |
- Abi-Dargham, A, et al.
(författare)
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Measurement of striatal and extrastriatal dopamine D1 receptor binding potential with [11C]NNC 112 in humans: validation and reproducibility
- 2000
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Ingår i: Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism. - : SAGE Publications. - 0271-678X. ; 20:2, s. 225-243
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Tidskriftsartikel (refereegranskat)abstract
- To evaluate the postulated role of extrastriatal D1 receptors in human cognition and psychopathology requires an accurate and reliable method for quantification of these receptors in the living human brain. [11C]NNC 112 is a promising novel radiotracer for positron emission tomography imaging of the D1 receptor. The goal of this study was to develop and evaluate methods to derive D1 receptor parameters in striatal and extrastriatal regions of the human brain with [11C]NNC 112. Six healthy volunteers were studied twice. Two methods of analysis (kinetic and graphical) were applied to 12 regions (neocortical, limbic, and subcortical regions) to derive four outcome measures: total distribution volume, distribution volume ratio, binding potential (BP), and specific-to-nonspecific equilibrium partition coefficient ( k3/ k4). Both kinetic and graphic analyses provided BP and k3/ k4 values in good agreement with the known distribution of D1 receptors (striatum > limbic regions = neocortical regions > thalamus). The identifiability of outcome measures derived by kinetic analysis was excellent. Time-stability analysis indicated that 90 minutes of data collection generated stable outcome measures. Derivation of BP and k3/ k4 by kinetic analysis was highly reliable, with intraclass correlation coefficients (ICCs) of 0.90 ± 0.06 (mean ± SD of 12 regions) and 0.84 ± 0.11, respectively. The reliability of these parameters derived by graphical analysis was lower, with ICCs of 0.72 ± 0.17 and 0.58 ± 0.21, respectively. Noise analysis revealed a noise-dependent bias in the graphical but not the kinetic analysis. In conclusion, kinetic analysis of [11C]NNC 112 uptake provides an appropriate method with which to derive D1 receptor parameters in regions with both high (striatal) and low (extrastriatal) D1 receptor density.
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| 10. |
- Fjelstad, Jens, 1971-, et al.
(författare)
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Logarithmic conformal field theories via logarithmic deformations
- 2002
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Ingår i: Nuclear Physics B. - : Elsevier. - 0550-3213 .- 1873-1562. ; 633:3, s. 379-413
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Tidskriftsartikel (refereegranskat)abstract
- We construct logarithmic conformal field theories starting from an ordinary conformal field theory -- with a chiral algebra C and the corresponding space of states V -- via a two-step construction: i) deforming the chiral algebra representation on V\tensor End K[[z,1/z]], where K is an auxiliary finite-dimensional vector space, and ii) extending C by operators corresponding to the endomorphisms End K. For K=C^2, with End K being the two-dimensional Clifford algebra, our construction results in extending C by an operator that can be thought of as \partial^{-1}E, where \oint E is a fermionic screening. This covers the (2,p) Virasoro minimal models as well as the sl(2) WZW theory.
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