D. Vanderlaan

发表

W. I. Wong, D. Vanderlaan, 2020 .

Children's intergroup gender bias and self-perceived same- and other-gender similarity.

D. Vanderlaan, D. Peragine, Bhajan Gill, 2020, The British journal of developmental psychology.

Evidence for an altered sex ratio in clinic-referred adolescents with gender dysphoria.

R. Blanchard, Victoria Lishak, B. Kreukels, 2015, The journal of sexual medicine.

Birth weight and two possible types of maternal effects on male sexual orientation: a clinical study of children and adolescents referred to a Gender Identity Service.

R. Blanchard, D. Vanderlaan, K. Zucker, 2015, Developmental psychobiology.

Courtship behaviour in Japanese macaques during heterosexual and homosexual consortships

D. Vanderlaan, P. Vasey, D. Rains, 2008, Behavioural Processes.

Cognitive processing of sexual cues in asexual individuals and heterosexual women with desire/arousal difficulties

A. Kingstone, D. Vanderlaan, D. Peragine, 2021, PloS one.

Recalled Childhood Separation Anxiety Differs by Anal Sex Role among Gay Men

D. Vanderlaan, D. Monks, A. Swift-Gallant, 2021, Journal of sex research.

Behavioral and Emotional Problems in Gender-Nonconforming Children: A Canadian Community-Based Study.

D. Vanderlaan, Anna I. R. van der Miesen, A. Miesen, 2018, Journal of the American Academy of Child and Adolescent Psychiatry.

Psychosocial and Psychological Vulnerability in Adolescents with Gender Dysphoria: A “Proof of Principle” Study

D. Vanderlaan, K. Zucker, Hayley Wood, 2017, Journal of sex & marital therapy.

A Multi-Modal MRI Analysis of Cortical Structure in Relation to Gender Dysphoria, Sexual Orientation, and Age in Adolescents

Gabriel A. Devenyi, M. Chakravarty, N. Lobaugh, 2021, Journal of clinical medicine.

An anthropometric study of sexual orientation and gender identity in Thailand

D. Vanderlaan, D. Peragine, Madison Aitken, 2021, Scientific Reports.

Self-harm and suicidality in gender-nonconforming children: A Canadian community-based parent-report study.

D. Vanderlaan, Laura N MacMullin, Madison Aitken, 2020 .

BIRTH ORDER AND ANDROPHILIC MALE-TO-FEMALE TRANSSEXUALISM IN BRAZIL

R. Blanchard, D. Vanderlaan, Raffael Massuda, 2016, Journal of Biosocial Science.

Male homosexuality and maternal immune responsivity to the Y-linked protein NLGN4Y

R. Blanchard, D. Vanderlaan, Adam J. MacNeil, 2017, Proceedings of the National Academy of Sciences.

The Risks and Benefits of Being "Early to Bed": Toward a Broader Understanding of Age at Sexual Debut and Sexual Health in Adulthood.

E. Impett, D. Vanderlaan, D. Peragine, 2022, The journal of sexual medicine.

A method yielding comparable estimates of the fraternal birth order and female fecundity effects in male homosexuality

R. Blanchard, D. Vanderlaan, K. Zucker, 2020, Proceedings of the Royal Society B.

Inter-Network Brain Functional Connectivity in Adolescents Assigned Female at Birth Who Experience Gender Dysphoria

N. Lobaugh, M. Lombardo, M. Lai, 2022, Frontiers in Endocrinology.

Familial Patterning and Prevalence of Male Androphilia in Samoa

D. Vanderlaan, Scott W. Semenyna, P. Vasey, 2017, Journal of sex research.

The Prevalence of Only-Child Status Among Children and Adolescents Referred to a Gender Identity Service Versus a Clinical Comparison Group

R. Blanchard, D. Vanderlaan, K. Zucker, 2017, Journal of sex & marital therapy.

Gender Nonconformity and Birth Order in Relation to Anal Sex Role Among Gay Men

D. Vanderlaan, D. Monks, A. Swift-Gallant, 2017, Archives of Sexual Behavior.

Birth Order and Sibling Sex Ratio of Children and Adolescents Referred to a Gender Identity Service

R. Blanchard, D. Vanderlaan, K. Zucker, 2014, PloS one.

Male Sexual Orientation in Independent Samoa: Evidence for Fraternal Birth Order and Maternal Fecundity Effects

D. Vanderlaan, P. Vasey, 2011, Archives of sexual behavior.

Birth order and male androphilia in Samoan fa'afafine

D. Vanderlaan, P. Vasey, 2007, Proceedings of the Royal Society B: Biological Sciences.

The Prevalence of Fa’afafine Relatives Among Samoan Gynephilic Men and Fa’afafine

D. Vanderlaan, P. Vasey, Lanna J Petterson, 2013, Archives of sexual behavior.

Offspring Production among the Extended Relatives of Samoan Men and Fa'afafine

D. Vanderlaan, P. Vasey, Lanna J Petterson, 2012, PloS one.

Comparative Reproductive Output of Androphilic and Gynephilic Males in Samoa

Jessica L. Parker, D. Vanderlaan, P. Vasey, 2014, Archives of sexual behavior.

Carving the Biodevelopment of Same-Sex Sexual Orientation at Its Joints

D. Vanderlaan, D. Peragine, Malvina N Skorska, 2022, Archives of Sexual Behavior.

Separation anxiety among birth-assigned male children in a specialty gender identity service

D. Vanderlaan, K. Zucker, Hayley Wood, 2017, European Child & Adolescent Psychiatry.

Gay Male Only-Children: Evidence for Low Birth Weight and High Maternal Miscarriage Rates

R. Blanchard, D. Vanderlaan, K. Zucker, 2016, Archives of Sexual Behavior.

The Effects of Race, Gender, and Gender-Typed Behavior on Children’s Friendship Appraisals

W. I. Wong, D. Vanderlaan, Miao K. Qian, 2020, Archives of Sexual Behavior.

Femininity and Kin-Directed Altruism in Androphilic Men: A Test of an Evolutionary Developmental Model

D. Vanderlaan, P. Vasey, Lanna J. Petterson, 2015, Archives of Sexual Behavior.

Sexual Orientation in Men and Avuncularity in Japan: Implications for the Kin Selection Hypothesis

D. Vanderlaan, P. Vasey, 2011, Archives of Sexual Behavior.

Elevated Kin-Directed Altruism Emerges in Childhood and Is Linked to Feminine Gender Expression in Samoan Fa’afafine: A Retrospective Study

D. Vanderlaan, P. Vasey, Lanna J. Petterson, 2016, Archives of Sexual Behavior.

A Comparison of the Reproductive Output Among the Relatives of Samoan Androphilic Fa’afafine and Gynephilic Men

D. Vanderlaan, Scott W. Semenyna, P. Vasey, 2016, Archives of Sexual Behavior.

Sex, Sexual Orientation, Gender Atypicality, and Indicators of Depression and Anxiety in Childhood and Adulthood

D. Vanderlaan, P. Vasey, Lanna J. Petterson, 2016, Archives of Sexual Behavior.

Comparative Reproductive Output of Androphilic and Gynephilic Males in Samoa

Jessica L. Parker, D. Vanderlaan, P. Vasey, 2013, Archives of Sexual Behavior.

Birth Order and Avuncular Tendencies in Samoan Men and Fa’afafine

D. Vanderlaan, P. Vasey, 2012, Archives of Sexual Behavior.

Evidence of Cognitive Biases for Maximizing Indirect Fitness in Samoan Fa’afafine

D. Vanderlaan, P. Vasey, 2014, Archives of Sexual Behavior.

Is Transgendered Male Androphilia Familial in Non-Western Populations? The Case of a Samoan Village

J. R. Vokey, D. Vanderlaan, P. Vasey, 2013, Archives of sexual behavior.

Behavioral and Emotional Problems on the Teacher’s Report Form: A Cross-National, Cross-Clinic Comparative Analysis of Gender Dysphoric Children and Adolescents

B. Kreukels, P. Cohen-Kettenis, D. Vanderlaan, 2013, Journal of Abnormal Child Psychology.

The “female fertility–social stratification–hypergyny” hypothesis of male homosexual preference: factual, conceptual and methodological errors in Barthes et al. [Commentary]

R. Hames, D. Vanderlaan, J. Leca, 2014 .

Kin Selection and the Evolution of Male Androphilia

D. Vanderlaan, P. Vasey, 2009, Archives of sexual behavior.

Gay Male Only-Children: Evidence for Low Birth Weight and High Maternal Miscarriage Rates

R. Blanchard, D. Vanderlaan, K. Zucker, 2017, Archives of sexual behavior.

GayMaleOnly-Children:EvidenceforLowBirthWeightandHigh Maternal Miscarriage Rates

R. Blanchard, D. Vanderlaan, K. Zucker, 2016 .

Evidence of Cognitive Biases for Maximizing Indirect Fitness in Samoan Fa’afafine

D. Vanderlaan, P. Vasey, 2014, Archives of Sexual Behavior.

No Evidence for Treating Friends’ Children Like Kin in Canadian Androphilic Men

D. Vanderlaan, P. Vasey, Miranda L. Abild, 2013, Journal of sex research.

The Prevalence of Fa’afafine Relatives Among Samoan Gynephilic Men and Fa’afafine

D. Vanderlaan, P. Vasey, Deanna L. Forrester, 2012, Archives of Sexual Behavior.

Birth order and recalled childhood gender nonconformity in Samoan men and fa'afafine

D. Vanderlaan, Scott W. Semenyna, P. Vasey, 2017, Developmental psychobiology.

Handedness is a biomarker of variation in anal sex role behavior and Recalled Childhood Gender Nonconformity among gay men

D. Vanderlaan, D. Monks, A. Swift-Gallant, 2017, PloS one.

Evolutionary Developmental Perspectives on Male Androphilia in Humans

D. Vanderlaan, P. Vasey, 2015 .

Transgendered Male Androphilia in the Human Ancestral Environment

D. Vanderlaan, P. Vasey, 2015 .

Male Androphilia in the Ancestral Environment

D. Vanderlaan, P. Vasey, Zhiyuan Ren, 2013, Human Nature.

Male Androphilia in the Ancestral Environment

D. Vanderlaan, P. Vasey, Zhiyuan Ren, 2013, Human Nature.

Direct Reproduction and Sexual Orientation and Gender Diversity in Thailand

D. Vanderlaan, Malvina N. Skorska, L. Coome, 2020, Archives of Sexual Behavior.

Facial Attractiveness of Sisters of Thai Gay Men and Sao Praphet Song

D. Vanderlaan, D. Peragine, Malvina N. Skorska, 2020, Journal of sex research.

Evidence for distinct biodevelopmental influences on male sexual orientation

D. Vanderlaan, Madison Aitken, D. Monks, 2019, Proceedings of the National Academy of Sciences.

Monetary exchanges with nieces and nephews: a comparison of Samoan men, women, and fa'afafine

D. Vanderlaan, P. Vasey, 2010 .

Kin selection and male androphilia in Samoan fa'afafine

D. Vanderlaan, P. Vasey, David S. Pocock, 2007 .

Commentary on Kishida and Rahman (2015), Including a Meta-analysis of Relevant Studies on Fraternal Birth Order and Sexual Orientation in Men

R. Blanchard, D. Vanderlaan, 2015, Archives of Sexual Behavior.

A Learning Experience? Enjoyment at Sexual Debut and the Gender Gap in Sexual Desire among Emerging Adults

D. Vanderlaan, D. Peragine, J. Maxwell, 2022, Journal of sex research.

Traits of autism spectrum disorder in school-aged children with gender dysphoria: A comparison to clinical controls.

J. Brian, M. Lai, D. Vanderlaan, 2019 .

Evolving research on the evolution of male androphilia

D. Vanderlaan, P. Vasey, 2014 .

The self in gender dysphoria: a developmental perspective

A. Beck, S. Bhar, M. Mikulincer, 2016 .

Targets and Tactics of Play Fighting: Competitive versus Cooperative Styles of Play in Japanese and Tonkean Macaques

S. Pellis, V. Pellis, B. Thierry, 2010 .

Pubertal Onset and Anal Sex Role Among Gay Men

D. Vanderlaan, Malvina N. Skorska, D. Monks, 2019, Psychology of Sexual Orientation and Gender Diversity.

Handedness and Birth Order Among Heterosexual Men, Gay Men, and Sao Praphet Song in Northern Thailand

D. Vanderlaan, S. Chariyalertsak, Malvina N. Skorska, 2020, Archives of Sexual Behavior.

Gender Nonconformity and Birth Order in Relation to Anal Sex Role Among Gay Men

D. Vanderlaan, D. Monks, A. Swift-Gallant, 2017, Archives of Sexual Behavior.

The development and evolution of male androphilia in Samoan fa'afafine

D. Vanderlaan, 2011 .

Examining the Relation Between Gender Nonconformity and Psychological Well-Being in Children: The Roles of Peers and Parents

D. Vanderlaan, D. Peragine, Laura N MacMullin, 2020, Archives of Sexual Behavior.

A Comparison of the Reproductive Output Among the Relatives of Samoan Androphilic Fa’afafine and Gynephilic Men

D. Vanderlaan, Scott W. Semenyna, P. Vasey, 2017, Archives of sexual behavior.

Behavior Problems and Psychiatric Diagnoses in Girls with Gender Identity Disorder: A Follow-Up Study

D. Vanderlaan, K. Zucker, S. Bradley, 2017, Journal of sex & marital therapy.

Evolutionary Perspectives on Male Androphilia in Humans

D. Vanderlaan, P. Vasey, 2014 .

Inter‐Mount Social Interactions During Heterosexual and Homosexual Consortships in Japanese Macaques

D. Vanderlaan, P. Vasey, D. Rains, 2008 .

Self-esteem, symptom severity, and treatment response in adolescents with internalizing problems.

D. Vanderlaan, Madison Aitken, Hazel Ngo, 2020, Journal of affective disorders.

Does Geographic Proximity Influence The Expression of Avuncular Tendencies in Canadian Androphilic Males

D. Vanderlaan, P. Vasey, Miranda L. Abild, 2014 .

Relationship status and elevated avuncularity in Samoan fa’afafine

D. Vanderlaan, P. Vasey, 2012 .

Sexual Orientation in Men and Avuncularity in Japan: Implications for the Kin Selection Hypothesis

D. Vanderlaan, P. Vasey, 2012, Archives of sexual behavior.

Separation Anxiety in Feminine Boys: Pathological or Prosocial?

D. Vanderlaan, P. Vasey, Nancy H. Bartlett, 2010 .

An Adaptive Cognitive Dissociation Between Willingness to Help Kin and Nonkin in Samoan Fa’afafine

D. Vanderlaan, P. Vasey, 2010, Psychological science.

Materteral and Avuncular Tendencies in Samoa

D. Vanderlaan, P. Vasey, 2009 .

Mental rotation task performance in relation to sexual and gender diversity in Thailand

D. Vanderlaan, D. Peragine, S. Chariyalertsak, 2021, Psychoneuroendocrinology.

(Trans)Gender Role Expectations and Child Care in Samoa

D. Vanderlaan, P. Vasey, Lanna J. Petterson, 2015, Journal of sex research.

Avuncular Tendencies and the Evolution of Male Androphilia in Samoan Fa’afafine

D. Vanderlaan, P. Vasey, 2010, Archives of sexual behavior.

The Third Sex—Kathoey: Thailand’s Ladyboys

D. Vanderlaan, P. Vasey, 2008 .

Evolution and Human B Kin selection and male androphilia in Samoan fa ’ afafine B

D. Vanderlaan, P. Vasey, David S. Pocock, 2007 .

Behavioral and Emotional Problems on the Teacher’s Report Form: A Cross-National, Cross-Clinic Comparative Analysis of Gender Dysphoric Children and Adolescents

B. Kreukels, P. Cohen-Kettenis, D. Vanderlaan, 2014, Journal of abnormal child psychology.

Childhood social gender transition and psychosocial well-being: A comparison to cisgender gender-variant children.

W. I. Wong, D. Vanderlaan, Laura N MacMullin, 2019, Clinical Practice in Pediatric Psychology.

Poor peer relations predict parent- and self-reported behavioral and emotional problems of adolescents with gender dysphoria: a cross-national, cross-clinic comparative analysis

A. D. de Vries, P. Cohen-Kettenis, D. Vanderlaan, 2015, European Child & Adolescent Psychiatry.

Models of Psychopathology in Children and Adolescents with Gender Dysphoria

D. Vanderlaan, K. Zucker, Hayley Wood, 2014 .

Suicidality in clinic-referred transgender adolescents

B. Kreukels, P. Cohen-Kettenis, D. Vanderlaan, 2020, European Child & Adolescent Psychiatry.

Autism Spectrum Disorder Risk Factors and Autistic Traits in Gender Dysphoric Children

D. Vanderlaan, J. Leef, K. Zucker, 2015, Journal of autism and developmental disorders.

Autism Spectrum Disorder Risk Factors and Autistic Traits in Gender Dysphoric Children

D. Vanderlaan, J. Leef, K. Zucker, 2014, Journal of Autism and Developmental Disorders.

Separation anxiety and gender variance in a community sample of children

D. Vanderlaan, D. Peragine, A. Miesen, 2019, European Child & Adolescent Psychiatry.

Recalled Separation Anxiety and Gender Atypicality in Childhood: A Study of Canadian Heterosexual and Homosexual Men and Women

D. Vanderlaan, P. Vasey, Nancy H. Bartlett, 2011, Archives of sexual behavior.

Traits of Separation Anxiety in Childhood: A Retrospective Study of Samoan Men, Women, and Fa’afafine

D. Vanderlaan, P. Vasey, Nancy H. Bartlett, 2011, Archives of sexual behavior.

Childhood Gender Variance and the Autism Spectrum: Evidence of an Association Using a Child Behavior Checklist 10-Item Autism Screener

D. Vanderlaan, A. N. Nabbijohn, A. V. D. van der Miesen, 2022, Journal of sex & marital therapy.

Gender Variance and the Autism Spectrum: An Examination of Children Ages 6–12 Years

A. Popma, A. D. de Vries, M. Lai, 2018, Journal of Autism and Developmental Disorders.

Corrections to Øien, Cicchetti, and Nordahl-Hansen’s (2018) “Gender Dysphoria, Sexuality and Autism Spectrum Disorder: A Systematic Map Review”

D. Vanderlaan, K. Zucker, 2018, Journal of autism and developmental disorders.

Do Children With Gender Dysphoria Have Intense/Obsessional Interests?

D. Vanderlaan, J. Leef, K. Zucker, 2015, Journal of sex research.

Intense/obsessional interests in children with gender dysphoria: a cross-validation study using the Teacher’s Report Form

D. Vanderlaan, K. Zucker, S. Bradley, 2017, Child and Adolescent Psychiatry and Mental Health.

Gender Variance and the Autism Spectrum: An Examination of Children Ages 6–12 Years

A. Popma, A. D. de Vries, M. Lai, 2018, Journal of Autism and Developmental Disorders.

Behavioral and emotional problems as a function of peer relationships in adolescents with gender dysphoria: A comparison with clinical and nonclinical controls.

S. Lollis, D. Vanderlaan, K. Zucker, 2016 .

Self-Harm and Suicidality in Children Referred for Gender Dysphoria.

D. Vanderlaan, S. Stojanovski, K. Zucker, 2016, Journal of the American Academy of Child and Adolescent Psychiatry.

Increasing Referrals for Gender Dysphoria.

D. Vanderlaan, K. Zucker, Madison Aitken, 2016, The Journal of adolescent health : official publication of the Society for Adolescent Medicine.

Commentary on Kishida and Rahman (2015), Including a Meta-analysis of Relevant Studies on Fraternal Birth Order and Sexual Orientation in Men

R. Blanchard, D. Vanderlaan, Doug P. VanderLaan, 2015, Archives of sexual behavior.

Sex, Sexual Orientation, Gender Atypicality, and Indicators of Depression and Anxiety in Childhood and Adulthood

D. Vanderlaan, P. Vasey, Lanna J. Petterson, 2017, Archives of sexual behavior.

Patterns of Sexual Coercion in Heterosexual and Non-Heterosexual Men and Women

D. Vanderlaan, P. Vasey, Doug P. VanderLaan, 2009, Archives of sexual behavior.

Mate Retention Behavior of Men and Women in Heterosexual and Homosexual Relationships

D. Vanderlaan, P. Vasey, 2008, Archives of sexual behavior.

Elevated Kin-Directed Altruism Emerges in Childhood and Is Linked to Feminine Gender Expression in Samoan Fa’afafine: A Retrospective Study

D. Vanderlaan, P. Vasey, Lanna J. Petterson, 2017, Archives of sexual behavior.

Femininity and Kin-Directed Altruism in Androphilic Men: A Test of an Evolutionary Developmental Model

D. Vanderlaan, P. Vasey, Lanna J. Petterson, 2016, Archives of sexual behavior.

Birth Order and Avuncular Tendencies in Samoan Men and Fa’afafine

D. Vanderlaan, P. Vasey, 2012, Archives of Sexual Behavior.

Female homosexual behavior and inter-sexual mate competition in Japanese macaques: Possible implications for sexual selection theory

D. Vanderlaan, Paul L. Vasey, J. Leca, 2014, Neuroscience & Biobehavioral Reviews.

The relation between women's body esteem and friendships with gay men.

D. Vanderlaan, P. Vasey, H. Patterson, 2009, Body image.

An Evolutionary Theory and Celebration of Male Sexual Arousal by Females: The Foundations of Male Heterosexuality

D. Vanderlaan, 2011 .

Elucidating the origins of heterosexual sex differences in mating psychology by examining the behaviour of homosexual men and women

D. Vanderlaan, 2007 .

Elevated childhood separation anxiety: An early developmental expression of heightened concern for kin in homosexual men?

D. Vanderlaan, P. Vasey, Lanna J. Petterson, 2015 .

The Effects of Race, Gender, and Gender-Typed Behavior on Children’s Friendship Appraisals

W. I. Wong, D. Vanderlaan, Genyue Fu, 2020, Archives of Sexual Behavior.

Children's Appraisals of Gender Nonconformity: Developmental Pattern and Intervention.

K. W. Kwan, W. I. Wong, D. Vanderlaan, 2020, Child development.

An examination of the biodevelopment of gender expression in children ages 6-to 12-years

D. Vanderlaan, D. Peragine, Malvina N. Skorska, 2018, The Canadian Journal of Human Sexuality.

Testing an intergroup relations intervention strategy to improve children's appraisals of gender-nonconforming peers

K. W. Kwan, W. I. Wong, D. Vanderlaan, 2020, The Canadian Journal of Human Sexuality.

Inter-sexual mate competition in three cultures

D. Vanderlaan, Scott W. Semenyna, P. Vasey, 2020, PloS one.

The Relationship Between Indicators of Depression and Anxiety and Sexual Orientation in Canadian Women

T. J. Persson, D. Vanderlaan, P. Vasey, 2017, Archives of sexual behavior.

The Relationship Between Indicators of Depression and Anxiety and Sexual Orientation in Canadian Women

T. J. Persson, D. Vanderlaan, P. Vasey, 2017, Archives of Sexual Behavior.

A Test of the Kin Selection Hypothesis for Female Gynephilia in Thailand

D. Vanderlaan, Francisco R. Gómez Jiménez, Daisy Z. Hu, 2023, Archives of Sexual Behavior.

A Problematic Test of the Kin Selection Hypothesis Among the Urak-Lawoi of Ko Lipe, Thailand: Commentary on Camperio Ciani, Battaglia, and Liotta (2015)

R. Hames, D. Vanderlaan, P. Vasey, 2016, Journal of sex research.

Is Transgendered Male Androphilia Familial in Non-Western Populations? The Case of a Samoan Village

J. R. Vokey, D. Vanderlaan, P. Vasey, 2012, Archives of Sexual Behavior.

Birth weight and two possible types of maternal effects on male sexual orientation: a clinical study of children and adolescents referred to a Gender Identity Service.

R. Blanchard, D. Vanderlaan, K. Zucker, 2015, Developmental psychobiology.

Children's bias in appraisals of gender-variant peers.

W. I. Wong, D. Vanderlaan, A. N. Nabbijohn, 2020, Journal of experimental child psychology.

The Monkeys of Stormy Mountain: Is female homosexual behaviour in Japanese macaques truly sexual?

D. Vanderlaan, P. Vasey, 2012 .

Sex, Sexual Orientation, Gender Atypicality, and Indicators of Depression and Anxiety in Childhood and Adulthood

D. Vanderlaan, P. Vasey, Lanna J. Petterson, 2016, Archives of Sexual Behavior.

Cortical Structure Differences in Relation to Age, Sexual Attractions, and Gender Dysphoria in Adolescents: An Examination of Mean Diffusivity and T1 Relaxation Time

Gabriel A. Devenyi, D. Vanderlaan, K. Zucker, 2023, Brain sciences.

Born Gay: The Psychobiology of Sex Orientation

D. Vanderlaan, P. Vasey, 2008 .