The Matilda Effect: When Women-Scientists are Written Out

As appropriate to the month when we mark International Women’s Day, our pieces have revolved around women, their achievements and barriers to their growth. This week, we look at an uncomfortable historical pattern: how many of the contributions made by women have been ignored, minimized, or credited to men. This phenomenon has a name — the Matilda Effect.

The term was coined in 1993 by historian of science Margaret W. Rossiter, who used it to describe the systematic denial of recognition to women-scientists whose work was often attributed to male colleagues. Rossiter named it after the 19th-century American activist Matilda Joslyn Gage, who had earlier observed how women’s intellectual achievements were routinely erased from public record.

In simple terms, the Matilda Effect refers to the tendency for women’s scientific or scholarly contributions to be overlooked while men receive the credit.

Why the Matilda Effect Matters

Recognition is not just about credit; it shapes opportunity.

Academic promotions, research funding, leadership roles, and history are all tied to who gets acknowledged. When women’s contributions are under-recognized, it creates a cycle in which fewer women are visible as role models for the next generation.

Young girls interested in science, technology, engineering, and mathematics often search for people who look like them in positions of intellectual authority. When those figures are missing from textbooks and public discourse, aspirations can quietly narrow.

The Matilda Effect therefore operates not only as a historical injustice but also as a structural barrier to gender equity in knowledge systems.

History’s Striking Examples

Consider Rosalind Franklin’s whose X-ray crystallography images were critical to understanding the structure of DNA and enabled the breakthrough model proposed by James Watson and Francis Crick. Yet when the Nobel Prize was awarded in 1962, Franklin — who had already passed away — received little recognition for her role.

Another well-known case is of Lise Meitner, the Austrian physicist who played a key role in explaining nuclear fission. The Nobel Prize for the discovery went solely to her collaborator Otto Hahn.

India’s own intellectual history reflects similar patterns.

Take Janaki Ammal, the pioneering botanist and cytogeneticist whose work significantly advanced plant breeding and biodiversity studies in India. Despite her groundbreaking research, she remained far less publicly known than many of her male contemporaries.

Or Anna Mani, the pioneering physicist and meteorologist whose work laid the foundation for modern meteorological instrumentation in India. She played a crucial role in standardizing weather measurement systems and advancing research in solar radiation and wind energy, contributing significantly to India’s renewable energy potential. Despite the far-reaching impact of her work, she remained relatively under-recognized outside scientific and policy circles.

(MM blogs on these two amazing ladies are linked below)

Similarly, Asima Chatterjee, one of India’s foremost organic chemists, made pioneering contributions to the chemistry of natural products and anti-malarial drugs. Although widely respected within scientific circles, her name rarely appears in popular narratives of Indian science.

Signs of Change

Things are hopefully changing. An example is Tessy Thomas, often called India’s “Missile Woman.” As a senior scientist at the Defence Research and Development Organisation, she played a key role in the development of the long-range ballistic missile Agni‑V. Her journey from a small town in Kerala to leading strategic defence projects has made her an inspiration for many young women considering careers in engineering and defence research.

Another widely admired figure is Gagandeep Kang, a leading medical scientist known for her work on infectious diseases and vaccines. As the first Indian woman elected Fellow of the Royal Society in the field of biomedical science, she has become a powerful role model for girls interested in medical research and public health.

In the world of space science, Ritu Karidhal and Muthayya Vanitha gained national recognition for their leadership roles in India’s lunar mission Chandrayaan‑2 at the Indian Space Research Organisation. Their visibility during the mission helped reshape public perceptions about who leads complex scientific and technological projects.

Similarly, Nandini Harinath, another senior scientist at ISRO, became widely known after the success of the Mars Orbiter Mission, where she was part of the core navigation and mission design team.

Dr. Gagandeep Kang

What distinguishes these scientists is not only their technical expertise but also their public presence. Through lectures, interviews, and outreach programs, they actively encourage young girls to consider careers in STEM — science, technology, engineering, and mathematics.

Recognition is the first step. Structural barriers — from access to research funding to representation in leadership — still need attention.

Here is to women-scientists having their day and say in scientific research!

–Meena

Picture: Indian Academy of Sciences

​See Magnoila Lady Janaki Ammal https://millennialmatriarch464992105.wordpress.com/wp-admin/post.php?post=2994&action=edit

and Weather Woman Anna Mani at https://millennialmatriarch464992105.wordpress.com/wp-admin/post.php?post=3235&action=edit

Magnolia Lady Janaki Ammal

Whenever I write a piece about plants, one of the things that interests me is how the plant got its botanical name. In many cases the nomenclature includes the name of the scientist which was associated with the discovery or study of the plant. Most of the names are western. It was a pleasant surprise to learn about a plant that is named after an Indian botanist, and that too a lady! This plant is a variety of the magnolia and is named Magnolia kobus Janaki Ammal.

The story of Janaki Ammal herself is fascinating and inspiring. And her contribution to plant sciences covers a wide and impressive range of achievements.

Edavaleth Kakkat Janaki Ammal was born on 4 November 1897, in Tellicherry (now Thalassery) in Kerala. Her father, Dewan Bahadur EK Krishnan, was a sub-judge at Tellicherry in what was then the Madras Presidency. He had a large family consisting of 19 children from two wives, and Janaki grew up amidst numerous siblings, in a home environment which had a well-stocked library, that included scientific and literary journals, and a well-tended garden. Her father had a keen interest in natural sciences and kept abreast with developments in the sciences. He also wrote two books on the birds of the North Malabar region. From an early age Janaki herself had an avid interest in the natural environment, and a scientific temperament.

It is this that decided her further academic studies after she finished school in Tellicherry. At a time when women (including her sisters) were married off at a young age, Janaki chose to move away from home in pursuit of higher education. She obtained a Bachelor’s degree from Queen Mary’s College, Madras, and an honours degree in botany from the Presidency College. After graduating, she taught for three years at the Women’s Christian College in Madras. It was then that she was awarded the prestigious Barbour Scholarship for Asian women to study in the United States. She travelled to America to join the University of Michigan as a Barbour Scholar in 1924 and earned her Masters of Science degree in 1925. She continued her work which focussed on plant cytology and breeding of hybrid plants to earn her doctorate in 1931. She was the first Indian woman to receive this degree in botany in the US.

Returning with a doctorate from the US, Janaki returned to teaching as a professor of Botany at the Maharaja’s College of Science in Trivandrum, from 1932-1934. She then joined as a geneticist at the Sugarcane Breeding Institute in Coimbatore. At the time, India was importing sugarcane. Although India also produced a lot of sugarcane, it was not as sweet as the imported one. The Sugarcane Breeding Station at Coimbatore had been set up to carry out research to improve the quality of sugarcane grown in India. The work of two scientists there, CA Barber and TS Venkataraman, especially in cross-breeding different varieties was so successful that in just five years the production of sugarcane doubled in India.

Ammal joined these scientists at the research institute in 1934, and started her research in sugarcane. Her cytogenetic research of sugarcane, and her experiments with cross-breeding and hybrids led to a better understanding of sugarcane breeds, in turn leading to better cross-breeds of sweeter variety. It also helped analyse the geographical distribution of sugarcane across India. Janaki faced many professional and personal challenges as a highly educated unmarried female scientist in a male-dominated institute where, despite the “science”, a patriarchal and traditional mind set prevailed with respect to gender and caste. 

In 1935, she was selected as one of the first Research Fellows of the Indian Academy of Sciences set up by the Nobel laureate CV Raman.

In 1940 Janaki went to England and joined the John Innes Horticultural Institution in London as an assistant cytologist. England had just declared war on Germany; Janaki worked through the bombings and blackouts, often, it is reported, diving under her bed at night as London was bombed, and going to her lab in the morning to clear the broken glass and debris from the previous night’s bombing, while she continued to focus on her research.

Janaki worked closely with the geneticist Cyril Dean Darlington for five years. The two collaborated to write the Chromosome Atlas of Cultivated Plants, which is a key text for plant scientists even today. Unlike other botanical atlases that focused on botanical classification, this atlas recorded the chromosome number of about 100,000 plants, providing knowledge about breeding and evolutionary patterns of botanical groups.

In 1946, she joined the Royal Horticultural Society in Wisley in a paid position as a cytologist. Janaki became the Society’s first salaried woman staff member. There, she studied the botanical uses of colchicine, a medication that can double a plant’s chromosome number and result in larger and quicker-growing plants. One of the results of her investigations was a magnolia shrub with flowers of bright white petals and purple stamens. This was named Magnolia kobus Janaki Ammal in her honour, and continues to bloom in Wisely even today.

Janaki returned to India in the early 1950s at the request of the then Prime Minister Jawaharlal Nehru. Her brief was to “improve the botanical base of Indian agriculture”.

She was appointed supervisor in charge of directing the Central Botanical Laboratory in Lucknow. In this capacity, she would reorganize the Botanical Survey of India (BSI), originally established in 1890 to collect and survey India’s flora, under the supervision of Britain’s Kew Gardens.

It was during this period that Janaki found herself looking beyond pure research and realising that in the race for increasing food grain production, the country was losing vast tracts of forests and valuable indigenous plant species. She was also distressed that despite Independence the system of plant collections and research remained colonial in mind set and practice. She was also keen to revitalize and indigenize botanical surveys.  After spending decades applying her research skills to improving the commercial use of plants, she began using her influence to preserve indigenous plants under threat. She began to speak of the value of indigenous cultures and the important role of women in preserving and cultivating local plants, which were being threatened by mass production of cereals. 

Janaki was among the pioneers that foresaw and warned of the threats to the fragile ecosystems in the race for ‘development’. She continued to speak out about this till the end of her life. At the age of 80 she vociferously opposed the proposed hydroelectric plant in Silent Valley in Kerala that would have threatened the unique biodiversity of a pristine evergreen tropical forest. Her voice as an eminent national scientist was respected, and was contributory to the scrapping of the proposal.

Janaki Ammal continued her distinguished public career in many important government postions: She headed the Central Botanical Laboratory at Allahabad. She worked as an officer on special duty at the regional research laboratory in Jammu and Kashmir and had a brief spell at the Bhabha Atomic Research Centre at Trombay. In November 1970 Janaki decided to settle down in Madras where she worked as an Emeritus Scientist at the Centre for Advanced Study in Botany, University of Madras. Her research work continued unabated, with special attention on medicinal plants and ethnobotany. She continued her research at the Centre’s Field Laboratory at Maduravoyal near Madras and kept on publishing her work until her demise in February 1984.

A lifetime of pioneering work by a woman well ahead of her times. But whenever she was asked about her life, all she had to say was “my work is what will survive”. An unassuming woman who lived a simple Gandhian life, married to her work, and her first and life-long love for plants. A brilliant mind who made her own choices and forged her own path in her pursuit of knowledge. A trial blazer who “sweetened the nation and saved a valley”—Janaki Ammal.

–Mamata