{"id":7895,"date":"2022-03-28T20:44:59","date_gmt":"2022-03-28T19:44:59","guid":{"rendered":"https:\/\/brendadegroot.com\/research\/"},"modified":"2026-07-24T13:59:25","modified_gmt":"2026-07-24T12:59:25","slug":"research","status":"publish","type":"page","link":"https:\/\/brendadegroot.com\/nl\/research\/","title":{"rendered":"Research"},"content":{"rendered":"

[et_pb_section fb_built=”1″ _builder_version=”4.16″ _module_preset=”default” background_color=”#FFFFFF” custom_padding=”0px||0px||false|false” global_colors_info=”{}”][et_pb_row _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_divider show_divider=”off” _builder_version=”4.16″ _module_preset=”5fc946a9-41f7-4b05-b37c-59989464a5c5″ global_colors_info=”{}”][\/et_pb_divider][dipl_double_color_heading heading_main_part=”Research” heading_post_part=”_” display_in_stack=”on” _builder_version=”4.16″ _module_preset=”default” global_heading_settings_text_align=”center” post_header_text_color=”gcid-ee033ed2-5511-4f53-b3f7-5d42689e0cbf” post_header_font_size=”63px” post_header_line_height=”0em” custom_padding=”||||false|false” custom_padding_tablet=”|||0px|false|false” custom_padding_phone=”” custom_padding_last_edited=”on|desktop” global_heading_settings_text_align_tablet=”center” global_heading_settings_text_align_phone=”” global_heading_settings_text_align_last_edited=”on|desktop” border_color_bottom=”#FFFFFF” global_colors_info=”{%22gcid-f92bc16f-1394-45a1-915e-aa843d3d1b3e%22:%91%93,%22gcid-ee033ed2-5511-4f53-b3f7-5d42689e0cbf%22:%91%22post_header_text_color%22%93}”][\/dipl_double_color_heading][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”3_5,2_5″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”3_5″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.20.4″ _module_preset=”default” text_font=”Merriweather Light||||||||” header_text_align=”left” header_2_text_align=”left” header_text_align_tablet=”left” header_text_align_phone=”left” header_text_align_last_edited=”on|desktop” header_2_text_align_tablet=”left” header_2_text_align_phone=”left” header_2_text_align_last_edited=”on|phone” text_orientation_tablet=”left” text_orientation_phone=”” text_orientation_last_edited=”on|phone” global_colors_info=”{}”]<\/p>\n

Social Interactions of Crested Langurs (Trachypithecus <\/em>spp.)\u00a0<\/em><\/h3>\n

Keywords: Infant handling, allomothering, primate communication, social interaction<\/strong><\/p>\n

I currently study Delacour\u2019s langurs nd Hatinh langurs: (critically) endangered leaf-eating monkeys that inhabit the limestone forests of northern Vietnam. They belong to the colobines<\/a>, a diverse group of primates whose social behavior and cognition remains comparatively understudied relative to cercopithecines (macaques, baboons, guenons) and apes. One striking feature of these langurs is their bright orange infants, which attract considerable social attention from other group members. My research focuses on the interactions that emerge around and with these infants, including caregiving, infant handling, communication, and social coordination between individuals. By closely observing these everyday interactions, I aim to contribute to a broader understanding of social behavior and communication in primates, as well as the diversity of social life among the lesser-studied colobines.<\/p>\n

Advisor: Dr. Ikki Matsuda<\/a><\/p>\n

\n

[\/et_pb_text][\/et_pb_column][et_pb_column type=”2_5″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”https:\/\/brendadegroot.com\/wp-content\/uploads\/2026\/05\/DSC07597a-scaled.jpg” alt=”Delacour’s langur (Trachypithecus delacouri) with orange infant.” title_text=”Delacour’s langur with infant” _builder_version=”4.20.4″ _module_preset=”default” global_colors_info=”{}”][\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”2_3,1_3″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”2_3″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.20.4″ _module_preset=”default” text_font=”Merriweather Light||||||||” header_text_align=”left” header_2_text_align=”left” header_text_align_tablet=”left” header_text_align_phone=”left” header_text_align_last_edited=”on|desktop” header_2_text_align_tablet=”left” header_2_text_align_phone=”left” header_2_text_align_last_edited=”on|phone” text_orientation_tablet=”left” text_orientation_phone=”” text_orientation_last_edited=”on|phone” global_colors_info=”{}”]<\/p>\n

The Moral Standing of Animals<\/h3>\n

The psychology of speciesism<\/strong><\/p>\n

How much moral concern do we have for different animals? And to what extend does their sentience, cognitive capacity and likability explain their respecitve places on the circle of moral concern<\/em>? This study explores people’s evaluations of moral standing of a large range of animal species, and the cognitive and affective determinants that contribute to this evaluation.<\/p>\n

Collaborators: Jacy Reese Anthis<\/a>, Dr. Tom Wilderjans<\/a>, Dr. Matti Wilks<\/a>, Dr. Mariska Kret<\/a><\/p>\n

[\/et_pb_text][\/et_pb_column][et_pb_column type=”1_3″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”https:\/\/brendadegroot.com\/wp-content\/uploads\/2026\/07\/Example-data-visualization-e1784897928660.jpg” _builder_version=”4.20.4″ _module_preset=”default” hover_enabled=”0″ global_colors_info=”{}” title_text=”Example data visualization” sticky_enabled=”0″][\/et_pb_image][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ _builder_version=”4.16″ _module_preset=”default” background_color=”#FFFFFF” global_colors_info=”{}”][et_pb_row _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_divider disabled_on=”on|on|off” _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][\/et_pb_divider][dipl_double_color_heading heading_main_part=”Publications” heading_post_part=”_” display_in_stack=”on” _builder_version=”4.20.4″ _module_preset=”default” global_heading_settings_text_align=”left” post_header_text_color=”gcid-ee033ed2-5511-4f53-b3f7-5d42689e0cbf” post_header_font_size=”63px” post_header_line_height=”0em” custom_padding=”||||false|false” custom_padding_tablet=”|||0px|false|false” custom_padding_phone=”” custom_padding_last_edited=”on|desktop” global_heading_settings_text_align_tablet=”center” global_heading_settings_text_align_phone=”” global_heading_settings_text_align_last_edited=”on|desktop” border_color_bottom=”#FFFFFF” global_colors_info=”{%22gcid-f92bc16f-1394-45a1-915e-aa843d3d1b3e%22:%91%93,%22gcid-ee033ed2-5511-4f53-b3f7-5d42689e0cbf%22:%91%22post_header_text_color%22%93}”][\/dipl_double_color_heading][et_pb_text _builder_version=”4.20.4″ _module_preset=”default” text_font=”Merriweather Light||||||||” text_font_size=”15px” text_orientation_tablet=”left” text_orientation_phone=”” text_orientation_last_edited=”on|phone” global_colors_info=”{}”]<\/p>\n

Journal articles<\/h3>\n

Straffon, L. M., de Groot, B<\/span>.<\/strong>, Gorr, N. D., Tsou, Y. T., & Kret, M. E. (2024). Developing drawing skill: Exploring the role of parental support and cultural learning. Cognitive Development, 70<\/em>, 101444.<\/p>\n

De Groot, B.<\/span>, Gorr, N.D., Kret, M.E., Rieffe, C., Tsou, Y.T., & Mendoza Straffon, L. (2023). Development and preliminary validation of a questionnaire to measure parental support for drawing. Journal of Thinking Skills and Creativity,<\/em> 101228. https:\/\/doi.org\/10.1016\/j.tsc.2022.101228<\/a><\/p>\n

De Groot, B<\/span>., and Cheyne, S.M. (2016). Does mirror-enrichment improve primate well-being? Animal Welfare 25<\/em>(2), 163 – 170. https:\/\/www.ufaw.org.uk\/downloads\/de-groot.pdf<\/a><\/p>\n

De Groot, B<\/span>., and Nekaris, K.A.I. (2016). Ecology of the Germain\u2019s Langur (Trachypithecus germaini<\/em>) in a pre-release\u00a0environment and the implications for its conservation. Asian Primates Journal 6<\/em>(1), 2 – 14. https:\/\/tinyurl.com\/tgermaini<\/a><\/span><\/p>\n

<\/span><\/p>\n

Presentations<\/h3>\n

De Groot, B. (2026, January 16). Allomothering in Delacour\u2019s langurs and Hatinh langurs at the Endangered Primate Rescue Center<\/em> [Invited talk]. CPNP Conference, 16 January, Cuc Phuong National Park, Vietnam.<\/span><\/p>\n

De Groot, B. (2025, October 14). On the need and value of ethnography for understanding animals<\/em> [Invited talk]. CIFAR workshop Multispecies Societies and Social Norms in Animals. 11\u201320 October, Valparai, India.<\/span><\/p>\n

De Groot, B. Anthis, J.R., Wilks, M., Kret, M.E. (2025, May 22). Psychology for multispecies justice<\/em> [Oral presentation]. The Politics of Not Eating Animals Conference. 22\u201323 May, Amsterdam, The Netherlands.<\/p>\n

De Groot, B. (2023, July 20). Theory of Sentience: A concept for ascribing sentience to other beings<\/em>. Diverse Intelligences Summit 2023. St. Andrews, Scotland.<\/p>\n

De Groot, B. (2023, May 26). The animal revolution: Towards a post-anthropocentric paradigm shift in science and beyond<\/em>. Social Sciences Honours Conference, Leiden University, The Netherlands.<\/span><\/p>\n

De Groot, B. (2022, August 1). Animal ethnography: A cross-disciplinary approach for understanding animals<\/em>. Diverse Intelligences Summit 2022, St. Andrews, Scotland.<\/span><\/p>\n

 <\/p>\n

Posters<\/h3>\n

De Groot, B. (2025, December 6-7). Patterns and dynamics of infant transfers in Hatinh langurs (Trachypithecus hatinhensis<\/em>) and Delacour\u2019s langurs (T. delacouri<\/em>). Biodiversity and Wildlife 2025 Symposium, Kasetsart University, Bangkok, Thailand.<\/span><\/p>\n

De Groot, B. (2025, November 17-18). Patterns and dynamics of infant transfers in Hatinh langurs (Trachypithecus hatinhensis<\/em>) and Delacour\u2019s langurs (T. delacouri<\/em>). International Primatology and Wildlife Science Symposium (2025), Kyoto University, Kyoto, Japan.\u00a0<\/span><\/p>\n

De Groot, B., Anthis, J.R., Wilks, M., Kret, M.E. (2023, June 22-24). Mapping the moral standing of animals. PHAIR Society Animal Advocacy Conference, Canterbury, UK.<\/span><\/p>\n

De Groot, B., Gorr, N.D., Kret, M.E., Rieffe, C., Tsou, Y., & Mendoza-Straffon L. (2021, September 10). <\/span>Preliminary development and validation of a questionnaire to measure parental support for drawing<\/em>. [Poster presentation]. EADP Summer Tour, Poland (online)<\/span>. https:\/\/www.eadp.info<\/a><\/span><\/span>\u00a0<\/span>View poster<\/a><\/p>\n

De Groot, B. and Nekaris, K. A. I. (2018, November 28-30). <\/span>Humble mysteries: Studying the unknown lives of leaf-eating monkeys<\/em>. [Poster presentation]. NVG 26th annual meeting, Egmond aan Zee, The Netherlands.\u00a0<\/span>https:\/\/www.gedragsbiologie.nl\/meetings\/<\/a><\/span><\/span>\u00a0<\/span>View poster<\/a><\/p>\n

De Groot, B. and Ploeger, A. (2015, April 16-17).\u00a0<\/span>Primate empathy: Review of the evidence in two taxa.<\/em>\u00a0[Poster presentation]. Evolutionary Psychology & Primatology in the Low Countries, Conference organised by CBEN, Amsterdam, The Netherlands.\u00a0<\/span>http:\/\/www.cognitionbehaviorevolution.nl<\/a><\/span><\/span><\/p>\n

<\/span><\/span><\/p>\n

Other<\/h3>\n

De Groot, B. (2019). Conserving livelihoods and the Chamba Sacred Langur. Zoo’s Print, 34<\/em>(8), 8 – 9. View issue<\/a><\/p>\n

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Research grants<\/h3>\n

Kyoto University Graduate School of Science – Ginpu Fund (2026)
International Primatological Society \u2014 Small Research Grant (2026)
<\/span>Stichting het Kronendak \u2014 PhD Thesis Grant (2026)
<\/span>UCLA Asia Pacific Center – Hiroshi Wagatsuma Memorial Fund (2024)
<\/span>Australasian Animal Studies Association \u2014 AASA activity Fund (2024)
<\/span>Mohamed Bin Zayed Species Conservation Fund \u2014 Conservation grant <\/span>(2015)
<\/span>Mohamed Bin Zayed Species Conservation Fund \u2014 Conservation grant (2014)
<\/span>Primate Society of Great Britain \u2014 Conservation Grant Award (2014)
<\/span>Born Free Foundation \u2014 Small Grant (2014)<\/span><\/h3>\n

<\/span><\/p>\n

<\/span><\/p>\n

Scholarships & Fellowships<\/h3>\n

Monbukagakusho (MEXT) Scholarship \u2014 Doctoral Scholarship, Kyoto University (2025\u20132028)
<\/span>UCLA Asia Pacific Center \u2014 Hiroshi Wagatsuma Memorial Fellowship for study on Japanese primatology (2024)
<\/span>Prins Bernhard Cultuurfonds \u2014 PhD Scholarship (2023\u20132024)
<\/span>Dr Hendrik Muller\u2019s Vaderlandsch Fonds \u2014 PhD Scholarship (2023\u20132024)
<\/span>UCLA Department of Anthropology \u2014 Predoctoral Fellowship, UCLA (2023)
<\/span>Diverse Intelligences Summer Institute \u2014 Alumni fellowship (2022)
<\/span>Diverse Intelligences Summer Institute Fellowship \u2014 Fellowship (2021)<\/span><\/h3>\n

<\/h3>\n

Awards<\/h3>\n

Outstanding Poster Award \u2014 Biodiversity and Wildlife Symposium, Kasetsart University (2025)
<\/span>Excellent Poster Award \u2014 The 20th Primatology and Wildlife Science Symposium, Kyoto University (2025)<\/span><\/h3>\n

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Matsuda lab<\/span><\/a> (Dr. Ikki Matsuda)
<\/span>LINGlab<\/span><\/a> (Dr. Erica Cartmill)
<\/span>Cognitive Psychology and Affective Neuroscience (CoPAN) lab<\/span><\/a> (Dr. Mariska Kret)
<\/span>Animal Philosophy Study Group of the Netherlands (“Werkgroep Dierfilosofie”)<\/a>
GTA Animal Cognition group<\/a>
A.P.P.L.E<\/a>
<\/span><\/span><\/p>\n

Memberships<\/h4>\n

International Primatological Society<\/a>
American Society of Primatologists<\/span><\/a>
Gesellschaft f\u00fcr Primatologie<\/a>
Primate Society of Japan<\/a>
Australasian Animal Studies Association <\/span><\/a><\/b><\/p>\n

<\/h4>\n

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