| 11. |
- Bjärehed, Jonas, et al.
(författare)
-
Nonsuicidal self-injury in a community sample of adolescents: Subgroups, stability, and associations with psychological difficulties
- 2012
-
Ingår i: Journal of Research on Adolescence. - : Wiley. - 1532-7795 .- 1050-8392. ; 22:4, s. 678-693
-
Tidskriftsartikel (refereegranskat)abstract
- Patterns of nonsuicidal self-injury (NSSI) and their association with other psychological difficulties were studied in a community sample of young Swedish adolescents, by a 2-wave longitudinal design with a 1-year interval. Hierarchical cluster analysis at T1 identified eight NSSI subgroups in each gender, of which five were clearly replicated at T2. Among these were a subgroup with generalized high-frequent NSSI, which was associated with both internalizing and externalizing problems, and a subgroup of girls who engaged primarily in cutting and showed mainly internalizing problems. Generally, NSSI clusters among girls were more stable over time and associated with more psychological problems. The results indicate that different patterns of NSSI have different developmental and clinical implications.
|
|
| 12. |
- Dahl, Viktor, 1979-, et al.
(författare)
-
Peer networks and the development of illegal political behavior among adolescents
- 2014
-
Ingår i: Journal of research on adolescence. - Hoboken : Wiley-Blackwell. - 1050-8392 .- 1532-7795. ; 24:2, s. 399-409
-
Tidskriftsartikel (refereegranskat)abstract
- This study examined to what extent peer influence explains the development of illegal political behavior controlling for peer selection, legal political peer influence, and gender effects. Late adolescents who filled out questionnaires at two annual measurements were used in a longitudinal social network approach (N = 1006; Mage = 16.62). Results showed that peers’ involvement in illegal political behavior predicted adolescents’ increases in illegal political behavior. Adolescents did not select other peers with similar illegal political behavior. Nevertheless, adolescents selected peers with similar legal political behavior. Findings were discussed in light of a stage process where adolescents initially chose peers with similar legal political behavior. Subsequently, peers influence adolescents on both legal and illegal political behavior.
|
|
| 13. |
- Kerr, Margaret, et al.
(författare)
-
A reinterpretation of parental monitoring in longitudinal perspective
- 2010
-
Ingår i: Journal of research on adolescence. - Malden, uSA : Wiley-Blackwell. - 1050-8392 .- 1532-7795. ; 20:1, s. 39-64
-
Tidskriftsartikel (refereegranskat)abstract
- A commonly used measure of parental monitoring is parents’ knowledge of adolescents’ daily activities. This measure has been criticized on the grounds that parents get more knowledge about teenagers’ daily activities through willing youth disclosure than through their own active monitoring efforts, but this claim was based on cross-sectional data. In the present study, we re-examine this claim with longitudinal data over two years from 938 7th and 8th graders and their parents. Youth disclosure was a significant longitudinal predictor of parental knowledge in single-rater and cross-rater models. Neither measure of parents’ monitoring efforts—control or solicitation—was a significant predictor. In analyses involving delinquency, parental monitoring efforts did not predict changes in delinquency over time, but youth disclosure did. We conclude that because knowledge measures do not seem to represent parental monitoring efforts, the conclusions from studies using these measures should be reinterpreted.
|
|
| 14. |
- Skalli, Omar, et al.
(författare)
-
Astrocytoma grade IV (gLioblastoma multiforme) displays 3 subtypes with unique expression profiles of intermediate filament proteins
- 2013
-
Ingår i: Human Pathology. - : Elsevier BV. - 0046-8177. ; 44:10, s. 2081-2088
-
Tidskriftsartikel (refereegranskat)abstract
- Astrocytoma grade IV (glioblastoma multiforme) is the most common and most malignant tumor of the central nervous system and is currently noncurable. Here, we have examined a population-based cohort of 47 patients with grade IV astrocytoma, who underwent tumor surgery at Sahlgrenska University Hospital in Sweden and who survived after surgery for less than 200 days (short survivors, 28 patients) and more than 500 days (long survivors, 19 patients). For each tumor, we ascertained information on patient age, sex, tumor location, oncological treatment, and survival after surgery. The analysis of the tumor volume and the extent of tumor resection (incomplete versus complete resection of the macroscopic tumor) was made retrospectively from the preoperative radiological investigations and, when available, also from postoperative radiology. We performed semiquantitative immunohistochemical evaluation of the presence of intermediate filament (nanofilament) proteins glial fibrillary acidic protein, vimentin, nestin, and synemin in tumor cells. The intermediate filament system helps cells and tissues to cope with various types of stress, and thus, it might affect the malignant potential of grade IV astrocytoma. We propose a subclassification of astrocytomas grade IV with respect to the expression of the intermediate filament proteins glial fibrillary acidic protein, vimentin, nestin, and synemin, namely, type A, B, and C. Our results suggest that the expression of the intermediate filament proteins glial fibrillary acidic protein, vimentin, nestin, and synemin is coregulated in grade IV astrocytomas. The expression patterns of the intermediate filament proteins in astrocytoma type A, B, and C might have biological and clinical significance. (C) 2013 Elsevier Inc. All rights reserved.
|
|
| 15. |
- Tilton-Weaver, Lauree, 1960-, et al.
(författare)
-
What's in a name? : distinguishing between routine disclosure and self-disclosure
- 2014
-
Ingår i: Journal of research on adolescence. - : Wiley. - 1050-8392 .- 1532-7795. ; 24:4, s. 551-563
-
Tidskriftsartikel (refereegranskat)abstract
- A lack of specificity between two types of disclosure has emerged in research on adolescents’ relationship and communication with their parents. Researchers are obscuring the distinctions between self-disclosure and routine disclosure (i.e., disclosure of their whereabouts and activities to parents). In this article, we describe where the problems have arisen and then outline the conceptual differences between the two. Illustrations of how the two types of disclosure overlap or co-occur are provided to demonstrate how fruitful areas for future research can emerge from attending to the distinctions between these two constructs.
|
|
| 16. |
- Veenstra, René, et al.
(författare)
-
Network–Behavior Dynamics
- 2013
-
Ingår i: Journal of research on adolescence. - Hoboken, USA : Wiley-Blackwell. - 1050-8392 .- 1532-7795. ; 23, s. 399-412
-
Forskningsöversikt (refereegranskat)abstract
- Researchers have become increasingly interested in disentangling selection and influence processes. This literature review provides context for the special issue on network–behavior dynamics. It brings together important conceptual, methodological, and empirical contributions focusing on longitudinal social network modeling. First, an overview of mechanisms underlying selection and influence is given. After a description of the shortcomings of previous studies in this area, the stochastic actor-based model is sketched; this is used in this special issue to examine network–behavior dynamics. The preconditions for such analyses are discussed, as are common model specification issues. Next, recent empirical advances in research on adolescence are discussed, focusing on new insights into moderating effects, initiation of behaviors, time heterogeneity, mediation effects, and negative ties.
|
|
