ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    THE LONGITUDINAL ANALYSIS OF HOUSING CAREERS (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of regional science 25 (1985), S. 0 
    Details
    ISSN: 1467-9787
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-9787.1985.tb00295.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    The contribution to population in ellipticals of blue stragglers: A test of their origin (1989)
    Springer
    Astrophysics and space science 156 (1989), S. 169-171 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An observational test of the binary hypothesis for the origin of the blue straggler (BS) stars has been performed y searching for radial velocity variables among 27 BS in five galactic clusters. The significance of the BS phenomenon for the interpretation of evolutionary synthesis models and the spectra of elliptical galaxies is briefly discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00646361
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Analyzing twin resemblance in multisymptom data: Genetic applications of a latent class model for symptoms of conduct disorder in juvenile boys (1993)
    Springer
    Behavior genetics 23 (1993), S. 5-19 
    Details
    ISSN: 1573-3297
    Keywords: Adolescence ; age ; categorical data ; conduct disorder ; development ; etiological heterogeneity ; genotype × environment interaction ; latent class models ; major gene ; segregation analysis ; twins
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Psychology
    Notes: Abstract A model based on the latent class model is developed for the effects of genes and environment on multivariate categorical data in twins. The model captures many essential features of dimensional and categorical conceptions of complex behavioral phenotypes and can include, as special cases, a variety of major locus models including those that allow for etiological heterogeneity, differential sensitivity of latent classes to measured covariates, and genotype × environment interaction (G×E). Many features of the model are illustrated by an application to ratings on eight items relating to conduct disorder selected from the Rutter Parent Questionnaire (RPQ). Mothers rated their 8-to 16-year-old male twin offspring [174 monozygotic (MZ) and 164 dizygotic (DZ) pairs]. The impact of age on the frequency of reported symptoms was relatively slight. Preliminary latent class analysis suggests that four classes are required to explain the reported behavioral profiles of the individual twins. A more detailed analysis of the pairwise response profiles reveals a significant association between twins for membership of latent classes and that the association is greater in MZ than DZ twins, suggesting that genetic factors played a significant role in class membership. Further analysis shows that the frequencies of MZ pairs discordant for membership of some latent classes are close to zero, while others are definitely not zero. One possible explanation of this finding is that the items reflect underlying etiological heterogeneity, with some response profiles reflecting genetic categories and others revealing a latent environmental risk factor. We explore two “four-class” models for etiological heterogeneity which make different assumptions about the way in which genes and environment interact to produce complex disease phenotypes. The first model allows for genetic heterogeneity that is expressed only in individuals exposed to a high-risk (“predisposing”) environment. The second model allows the environment to differentiate two forms of the disorder in individuals of high genetic risk. The first model fits better than the second, but neither fits as well as the general model for four latent classes associated in twins. The results suggest that a single-locus/two-allele model cannot fit the data on these eight items even when we allow for etiological heterogeneity. The pattern of endorsement probabilities associated with each of the four classes precludes a simple “unidimensional” model for the latent process underlying variation in symptom profile in this population. The extension of the approach to larger pedigrees and to linkage analysis is briefly considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01067550
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    A simple method for censored age-of-onset data subject to recall bias: Mothers' reports of age of puberty in male twins (1994)
    Springer
    Behavior genetics 24 (1994), S. 457-468 
    Details
    ISSN: 1573-3297
    Keywords: Age of onset ; survival analysis ; puberty ; retrospective recall ; recall bias
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Psychology
    Notes: Abstract Genetic analysis of variation in age of onset of development milestones or psychopathological behaviors has been little researched, owing largely to the computational difficulty of dealing with “censored” observations. Censored observations arise when the only information on individuals is that they have reached a particular age but without onset having occurred. This paper shows how models can be simply fitted to such data using programs that can perform genetic analysis of categorical data by maximum likelihood. The method is illustrated using the program Mx with data on maternal report of the onset of puberty in twin sons from the Virginia Twin Study of Adolescent Behavioral Development. Frequently, data on age of onset is collected by retrospective recall. This can pose a variety of measurement problems. Suggestions are made for models that account for some of these problems or are robust to their presence. Substantial evidence for “telescoping” of onset dates is found for the puberty data. If left unaccounted for, these effects can artifactually inflate estimates of common environment effects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01076181
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Multiple raters of disruptive child behavior: Using a genetic strategy to examine shared views and bias (1995)
    Springer
    Behavior genetics 25 (1995), S. 311-326 
    Details
    ISSN: 1573-3297
    Keywords: Twins ; rater bias ; child behavior problems ; parental ratings ; conduct disorder ; heritability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Psychology
    Notes: Abstract Most research on child behavior incorporates information from different individuals. While agreement between informants is generally only modest, there is little understanding of the processes underlying disagreement. In twin studies, differential agreement among raters for MZ and DZ twins is of particular concern. The processes underlying differences among mother, father, and child ratings of oppositional and conduct disorder symptoms are explored. Evidence in favor of a shared parental view of behavior is presented. Parental ratings give higher intrapair correlations, which could be due to either parents rating their twins more similarly or twins contrasting themselves. Rater bias and situational specificity are among the possible explanations of differential ratings. The effects of incorporating multiple raters of behavior on estimates of genetic and environmental effects are explored. These suggest that genetic influences are greater for the shared (multiple-rater) phenotype than for individual ratings; reduction in measurement error is only a partial explanation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02197280
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    An Evaluation of Different Approaches for Behavior Genetic Analyses with Psychiatric Symptom Scores (2000)
    Springer
    Behavior genetics 30 (2000), S. 1-18 
    Details
    ISSN: 1573-3297
    Keywords: Behavior genetics ; twins ; psychopathology ; censoring ; multiple raters: symptom scores ; simulation study
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Psychology
    Notes: Abstract We used a simulation study to evaluate six approaches for behavior genetic analyses of psychiatric symptom scores. For the selection of the correct model, the best results were obtained with approaches using transformed scores in combination with a procedure involving p-values. With normalizing transformations, the χ2 test statistic gave a reasonable impression of the overall fit of the model but was less accurate when used as a difference test. The asymptotic distribution free estimation methods yielded χ2s that were much too large. All data analysis techniques yielded substantially biased parameter estimates. The most biased results were obtained with normalizing transformations. The least biased results were obtained with tobit correlations, but because of its large standard errors the most precise estimates were obtained with polychoric correlations and optimal scale scores. An empirical study showed that a recognition of the role of methodological factors was helpful to understand part of the differences between assessment instruments, raters, and data analysis techniques that were found in the real data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1002095608946
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Genetic and Environmental Influences on Child Reports of Manifest Anxiety and Symptoms of Separation Anxiety and Overanxious Disorders: A Community-Based Twin Study (1997)
    Springer
    Behavior genetics 27 (1997), S. 15-28 
    Details
    ISSN: 1573-3297
    Keywords: Manifest anxiety ; separation anxiety ; overanxious disorder ; child reports ; genetic influences ; environmental influences ; twin study
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Psychology
    Notes: Abstract Genetic and environmental influences in the determination of individual differences in self-reported symptoms of separation anxiety (SAD), overanxious disorder (OAD), and manifest anxiety (MANX) were evaluated in children and adolescents for three age groups (8–10, 11–13, and 14–16). Symptom counts for SAD and OAD were assessed for 1412 twin pairs using the children's version of the Child and Adolescent Psychiatric Assessment, and MANX scores were based on child report from the Revised Children's Manifest Anxiety Scales. Despite significant age and gender differences in thresholds of liability for child reports of symptoms of SAD and OAD, additive genetic and environmental effects could be set equal across age and gender for these variables. For MANX, however, the best-fitting model was a common effects sex-limitation model with estimates of heritabiliry varying dependent upon age and gender. Parameter estimates from the ACE models of OAD and SAD showed that additive genetic variation was a necessary component in the explanation of individual differences in child-reported symptoms of OAD (h 2 = .37) across gender, but does not appear to be a major contributor to the explanation of individual differences in symptoms of SAD reported by children. Shared environmental effects (c 2 = .40) were found to play a moderate role for SAD but could be dropped from the model for OAD and from all of the age groups for MANX, although the parameter approached significance among 11 yr to 13-year-old males.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1025607107566
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Genetic “Clocks” and “Soft” Events: A Twin Model for Pubertal Development and Other Recalled Sequences of Developmental Milestones, Transitions, or Ages at Onset (1998)
    Springer
    Behavior genetics 28 (1998), S. 243-253 
    Details
    ISSN: 1573-3297
    Keywords: Developmental milestone ; soft event ; mixed generalized linear model ; multilevel model ; multiplicative latent variables ; multiplicative random effects ; recall ; puberty
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Psychology
    Notes: Abstract We propose and explore a twin model to examine the basis for synchrony that often characterizes different facets of normal development. In so doing we also present an approach to the analysis of “soft” events; events for which available reports of dates or ages of occurrence are unreliable or inconsistent. Discrepancies among reports are accounted for by a statistical measurement model. This combines current status error reflecting uncertain definition of onset and two mechanisms for the phenomenon of “telescoping,” namely, systematic compression of the time scale and heteroscedastic random measurement error. Statistically, the model can be viewed as a mixed generalized linear model with random effects within both mean and variance functions or, alternatively, as involving multiplicative random effects. We apply the model to multiple maternal reports on menarche and onset of breast development in twin daughters. Fitted to data from the Virginia Twin Study Of Adolescent and Behavioral Development by the use of penalized/predictive quasi-likelihood, the model provided much improved estimates of the true age-at-onset distribution as compared to those from a naive analysis. Results suggested that the observed variance was made up almost entirely of genetic variance and measurement error variance due to telescoping and current status errors and that the timing of breast development and menarche are largely under the control of a common set of genes. Results also indicated that maternal recollections of the onset of breast development were both more poorly defined and subject to greater recall errors than maternal recollections of menarche.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1021615228995
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Genetic and Environmental Causes of Covariation in Interview Assessments of Disruptive Behavior in Child and Adolescent Twins (2000)
    Springer
    Behavior genetics 30 (2000), S. 321-334 
    Details
    ISSN: 1573-3297
    Keywords: Conduct disorder ; oppositional-defiant disorder ; attention-deficit hyperactivity disorder ; disruptive behavior ; twins ; comorbidity ; heterogeneity ; sibling contrast
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Psychology
    Notes: Abstract Multirater, face-to-face, interview data relating to conduct disorder (CD), oppositional-defiant disorder (ODD), and inattentive, impulsive, and hyperactive components of attention-deficit hyperactivity disorder (ADHD) in a population-based sample of 1376 pairs of 8- to 16-year-old MZ and DZ twins are analyzed to examine (1) the genetic and environmental causes of correlation among ratings of ODD and CD symptoms and (2) the pattern of genetic and environmental correlation among the three components of ADHD. Parental ratings of ADHD showed marked sibling contrast effects, specific within raters but partly common across components. After these effects were removed, there was a modest genetic correlation between maternal and paternal ratings, but genetic effects were virtually uncorrelated across boys and girls. Genetic correlations among inattention, impulsivity, and hyperactivity were all large but fell well short of unity. There was little evidence that counts of symptoms of CD and ODD were genetically independent but the genetic correlations among ratings of twins, mothers, and fathers were all relatively modest. ODD and CD showed much higher genetic correlations across sexes than did the measures of ADHD. There was no evidence of rater contrast effects or of shared family environment influences in the twin resemblance for ODD and CD.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026553518272
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    facet.materialart.
    Unknown
    A joint trip timing store-type choice model for grocery shopping, including inventory effects and nonparametric control for omitted variables (1987)
    Elsevier
    Details
    Publication Date: 1987-07-01
    Print ISSN: 0191-2607
    Electronic ISSN: 1878-3813
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Published by Elsevier
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...