Social anxiety and peer relations among adolescents: testing a psychobiological model

The START cell cycle transition in the budding yeast Saccharomyces cerevisiae is catalyzed by the Cdc28 cyclin-dependent kinase associated with Cln-type cyclins. Since ectopic expression of the B-type cyclin CLB5 can efficiently rescue the inviability that results from CLN depletion, we tested the specificity of the CLN and CLB classes of cyclins for promoting START-associated events. Several aspects of the regulation of the mating factor response were compared for cells in which START activity was provided by either Cln-cyclins or Clb5. Unlike Cln1 and Cln2, high level expression of Clb5 was unable to repress the activity of the mating factor response pathway at START. Downregulation of Far1 protein at START is normal in cln- GAL1::CLB5 cells. Even though the Clb5-Cdc28 kinase activity in cln- GAL1::CLB5 cells is not downregulated in response to mating factor, cells arrest in the first cycle after addition of mating factor with a similar sensitivity as wild-type cells. However, whereas wild-type cells treated with mating factor arrest specifically in G1 phase as unbudded cells with unreplicated DNA (pre-START), most cln- GAL1::CLB5 cells arrest as budded post-START cells with replicated DNA. Our findings demonstrate the ability of post-START cells to arrest in response to mating factor and provide novel evidence for mechanisms that contribute to restrict mating factor-induced arrest in wild-type cells to the G1 phase of the cell cycle.     

The Teenage Inventory of Social Skills: Development, reliability, and validity.

Describes the development and the evaluation of reliability and convergent and discriminant validity of a newly designed self-report questionnaire for the assessment of adolescent social competence: the Teenage Inventory of Social Skills (TISS). Two-week test–retest reliabilities for positive and negative behavior scales were .90 and .72; internal consistencies were .88. Convergent validity was assessed by comparing TISS scales with self-monitoring data, ratings by peers, and sociometric data. Discriminant validity was examined by investigating correlations between scores on the TISS and social desirability, SES, and another paper-and-pencil self-report instrument (Conflict Behavior Questionnaire) thought not to be necessarily related to adolescent social behavior. Results provided adequate evidence for both the convergent and discriminant validity of the TISS scales. (PsycINFO Database Record (c) 2010 APA, all rights reserved)