Christian Vollmer

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Chronotype but not sleep length is related to salivary testosterone in young adult men

Christian Vollmer, Christoph Randler, C. Randler, 2012, Psychoneuroendocrinology.

The influence of chronotype and intelligence on academic achievement in primary school is mediated by conscientiousness, midpoint of sleep and motivation

C. Randler, Christian Vollmer, T. Arbabi, 2015, Chronobiology international.

Attitudes Towards the Elderly Among German Adolescents

C. Randler, Christian Vollmer, D. Wilhelm, 2014 .

Computer Game Addiction in Adolescents and Its Relationship to Chronotype and Personality

Mehmet Barış Horzum, C. Randler, Christian Vollmer, 2014 .

Internet Addiction and Its Relationship to Chronotype and Personality in a Turkish University Student Sample

Christian Vollmer, Mehmet Barış Horzum, Christoph Randler, 2013, Social Science Computer Review.

Relationship Between Depressive Symptoms and Sleep Duration/Chronotype in Women

C. Randler, Christian Vollmer, L. Stadler, 2012 .

Morningness and life satisfaction: Further evidence from Spain

C. Randler, Christian Vollmer, K. Jankowski, 2013, Chronobiology international.

Invertebrate disgust reduction in and out of school and its effects on state intrinsic motivation

C. Randler, Christian Vollmer, Peter Wüst-Ackermann, 2018, Palgrave Communications.

The influence of personality and chronotype on distance learning willingness and anxiety among vocational high school students in Turkey

Christian Vollmer, Mehmet Barış Horzum, Christoph Randler, 2014 .

Effects of a science center outreach lab on school students' achievement - Are student lab visits needed when they teach what students can learn at school?

B. Nagengast, U. Trautwein, Barbara Flunger, 2015 .

Women would like their Partners to be more Synchronized with them in their Sleep-Wake Rhythm

C. Randler, Christian Vollmer, K. Jankowski, 2014, The Spanish Journal of Psychology.

Sleep duration and chronotype in adults in Côte d'Ivoire: influence of gender, religion and age

C. Randler, Christian Vollmer, Claudia Borchers, 2015 .

Asymmetries in commitment in an avian communication network

C. Randler, Christian Vollmer, 2013, Naturwissenschaften.

“I Wanted a Profession That Makes a Difference”—An Online Survey of First-Year Students’ Study Choice Motives and Sustainability-Related Attributes

Christian Vollmer, Anna Oberrauch, Ivan Nikitin, 2021, Sustainability.

Animal Welfare Attitudes: Effects of Gender and Diet in University Samples from 22 Countries

C. Randler, A. Adan, V. Natale, 2021, Animals : an open access journal from MDPI.

Emotional and Motivational Outcomes of Lab Work in the Secondary Intermediate Track: The Contribution of a Science Center Outreach Lab.

Christian Vollmer, Heike Itzek-Greulich, 2017 .

Age and gender differences in morningness–eveningness in Turkish adolescents and young adults

Mehmet Barış Horzum, C. Randler, Christian Vollmer, 2014 .

Evening adolescents: the role of family relationships and pubertal development.

C. Randler, Christian Vollmer, K. Jankowski, 2014, Journal of adolescence.

Morningness is associated with better gradings and higher attention in class

Christian Vollmer, Christoph Randler, C. Randler, 2013 .

Morningness–eveningness and the environment hypothesis – A cross-cultural comparison of Turkish and German adolescents

Mehmet Barış Horzum, C. Randler, Christian Vollmer, 2015, Chronobiology international.

Effects of longitude, latitude and social factors on chronotype in Turkish students

Mehmet Barış Horzum, C. Randler, Christian Vollmer, 2015 .

Reliability and validation of a short scale to measure situational emotions in science education

C. Randler, P. Mayring, M. Gläser-Zikuda, 2011 .

Outdoor Light at Night (LAN) Is Correlated With Eveningness in Adolescents

C. Randler, Christian Vollmer, U. Michel, 2012, Chronobiology international.

COVID-19-lockdown delayed sleep timing in Tyrolean teachers

Christian Vollmer, K. Jankowski, 2022, Chronobiology international.

Breakpoints of time in bed, midpoint of sleep, and social jetlag from infancy to early adulthood.

C. Randler, Christian Vollmer, Heike Itzek-Greulich, 2019, Sleep medicine.

Association Among School‐related, Parental and Self‐related Problems and Morningness–Eveningness in Adolescents

C. Randler, Steffen Schaal, Christian Vollmer, 2011 .

The Vivarium: Maximizing Learning with Living Invertebrates—An Out-of-School Intervention Is more Effective than an Equivalent Lesson at School

C. Randler, Christian Vollmer, Peter Wüst-Ackermann, 2018, Insects.

Effects of Expressive Writing Effects on Disgust and Anxiety in a Subsequent Dissection

C. Randler, Christian Vollmer, Peter Wüst-Ackermann, 2014, Research in Science Education.

The Relationship between Disgust, State-Anxiety and Motivation during a Dissection Task.

C. Randler, Christian Vollmer, Peter Wüst-Ackermann, 2012 .

Development And Evaluation of A Sleep Education Program in Middle School Pupils Based on Self-Determination Theory

Christian Vollmer, Christoph Randler, C. Randler, 2014 .

The interaction of chronotype and time of day in a science course: Adolescent evening types learn more and are more motivated in the afternoon ☆

C. Randler, Christian Vollmer, Heike Itzek-Greulich, 2016 .

Invertebrate disgust reduction in and out of school and its effects on state intrinsic motivation

C. Randler, Christian Vollmer, Peter Wüst-Ackermann, 2018, Palgrave Communications.

Further Evidence for the Influence of Photoperiod at Birth on Chronotype in a Sample of German Adolescents

C. Randler, Christian Vollmer, L. D. Milia, 2012, Chronobiology international.

Eveningness is related to men’s mating success

C. Randler, Davide Piffer, Nadine Ebenhöh, 2012 .

Circadian preferences and personality values: Morning types prefer social values, evening types pref

C. Randler, Christian Vollmer, 2012 .

Aggression in Young Adults — A Matter of Short Sleep and Social Jetlag?

C. Randler, Christian Vollmer, 2013, Psychological reports.

Morningness-eveningness correlates with sleep time, quality, and hygiene in secondary school students: a multilevel analysis.

C. Randler, Christian Vollmer, K. Jankowski, 2017, Sleep medicine.

Morningness–eveningness and sociosexuality: Evening females are less restricted than morning ones

C. Randler, Christian Vollmer, K. Jankowski, 2014 .

Effects of Expressive Writing Effects on Disgust and Anxiety in a Subsequent Dissection

C. Randler, Christian Vollmer, Peter Wüst-Ackermann, 2015 .

Chronotype, Time of Day, and Performance on Intelligence Tests in the School Setting

Christian Vollmer, K. Jankowski, J. Díaz-Morales, 2023, Journal of Intelligence.

The role of chronotype, gender, test anxiety, and conscientiousness in academic achievement of high school students

C. Randler, Christian Vollmer, A. Rahafar, 2016, Chronobiology international.

Prediction of School Achievement by Conscientiousness , Test Anxiety , Gender , and Intelligence : The Unique Role of Chronotype

W. Rosenstiel, Christian Vollmer, Narges Mohammadi, 2017 .

Differences in sun time within the same time zone affect sleep–wake and social rhythms, but not morningness preference: Findings from a Polish–German comparison study

C. Randler, Christian Vollmer, K. Jankowski, 2014 .

Weak Associations of Morningness-Eveningness and Stability with Skin Temperature and Cortisol Levels

C. Randler, K. Scheiter, Christian Vollmer, 2019, Journal of circadian rhythms.

Prediction of school achievement through a multi-factorial approach – The unique role of chronotype

C. Randler, Christian Vollmer, A. Rahafar, 2017 .

Morningness–eveningness and amplitude – development and validation of an improved composite scale to measure circadian preference and stability (MESSi)

C. Randler, Christian Vollmer, J. Díaz-Morales, 2016, Chronobiology international.

Epidemiological Evidence for the Bimodal Chronotype Using the Composite Scale of Morningness

C. Randler, Christian Vollmer, 2012, Chronobiology international.

Composite Respect for Animals Scale

C. Randler, Christian Vollmer, Janine Binngießer, 2018, Society & Animals.

Women would like their Partners to be more Synchronized with them in their Sleep-Wake Rhythm

C. Randler, Christian Vollmer, K. Jankowski, 2014, The Spanish Journal of Psychology.

Learning Achievement and Motivation in an Out-of-School Setting—Visiting Amphibians and Reptiles in a Zoo Is More Effective than a Lesson at School

C. Randler, Christian Vollmer, Peter Wüst-Ackermann, 2017 .