Quantitative Frequency Analysis Research Articles

Optimization of treatment and prevention of recurrences of bacterial vaginosis in postmenopausal women

The study aimed to improve the effectiveness of treatment and prevention of recurrences of bacterial vaginosis (BV) in postmenopausal women. 87 women with BV aged 50 to 65 who received a course of antibacterial therapy with control clinical and laboratory recovery were examined. In the future, two groups were selected: the first group (42 women) received probiotics in suppositories (live lactobacillus strains L. aktobacillus plantarum 8P-A3 or L. plantarum 38, or L. fermentum 90T-C4, or L. fermentum 39) vaginally 2 times a day for 10 days. Women of the second group (45 patients) received probiotics vaginally once a day for 20 days and a suppository with estriol 0.5 mg vaginally once a day for 2 weeks, and then 2 times a week for 3 months. Evaluation of effectiveness was carried out after 3 and 6 months. A gynecological examination, determination of the pH reaction of vaginal contents, aminotest, microscopy of vaginal smears, bacteriological cultures on nutrient media for the determination of facultatively anaerobic bacteria, Gardnerella vaginalis, quantitative analysis of vaginal microflora, species composition and frequency of lactobacilli were performed. In the women of the first group, the risk of recurrence of the laboratory criteria of BV increases after 3 months: an increase in the pH of the vaginal contents by 1.2 times (p<0.05), the appearance of a positive aminotest in 38.1% of patients, the presence of Gardnerella vaginalis in 26.2% women with a pathological number of 104-105 CFU/ml, regression of the pool of lactobacilli with worsening of the situation and the appearance of clinical manifestations of the disease after 6 months. In the second group, there was a decrease in cases of recovery of laboratory markers after 3 months and clinical and laboratory criteria of BV after 6 months. The study proves the necessity of determining the laboratory criteria for the diagnosis of BV in dynamics 3 months after the main course of antimicrobial therapy in women without a clinical picture of recurrence. The effectiveness of intravaginal use of probiotics and vaginal estriol at a dose of 0.5 mg for the treatment and prevention of BV recurrences in postmenopausal women with a long course has been shown (4 months).

Investigating the visual content of a commercialized academic listening test: Implications for validity

As incorporating visual modes in listening tests is gradually gaining traction in second language (L2) assessment, the inclusion of such visuals brings up questions about the role of visual modes in meaning-making during listening and test validity. In this study, we investigated the visual features of the International English Language Testing System (IELTS) listening test through the application of the social semiotic multimodal framework. Our corpus comprised 300 visuals from 256 academic listening testlets published between 1996 and 2022. Unlike the past studies of social semiotic multimodal analyses that relied on qualitative methods, our study adopted a series of visualization and quantitative statistical analysis of frequency and dispersion measures, using the general linear model to examine the visuals from a social semiotic multimodal perspective. The results revealed significant variation in the visual structures of the testlets. Through applying a post-hoc analysis, we further proposed recommendations for further research on multimodal materials in listening assessment and discussed the implications of the observed variation for the validity of the IELTS listening test. This study may be considered the first attempt to examine L2 listening assessment from a corpus-based social semiotic multimodal perspective, which may inspire more investigations on multimodal listening.

School-Home Crisis Communication During the First Wave of COVID-19

ABSTRACT In early 2020, UNESCO acknowledged that the scale of educational disruption associated with COVID-19 was unparalleled. Schools were forced to react swiftly. However, while remote learning has received considerable attention, less is understood of how educational leaders communicated during the COVID crisis. The study of school leaders’ initial crisis communications in response to government-mandated school closures is thus warranted. Accordingly, this study analyses a cross-section of seventeen Australian schools for the period late February through early April 2020 (i.e. term 1), with a focus on the emergency stage of schools’ crisis response, rather than the later remote learning continuity planning phase. A mixed-method research approach was adopted. Phase one involved quantitative content analysis of e-mail frequency, words per-sentence, readability (as measured by Flesch), and grade-level communication pitched at (as measured by Flesch-Kinkaid). Surprisingly, parents required university education to effectively comprehend the e-mails. Phase two confirmed that schools performed well in the first four of Smith & Riley’s (2012) five-step school crisis response model (getting the facts, implementing contingency plans, being decisive, showing concern), but were less effective at facilitating two-way communication. An additional (sixth) insight emerged in the form of school community.

Digital natives on the rise: A systematic literature review on generation Z's engagement with RAISA technologies in hospitality services

Technological disruptions, health crises, persistent labour issues, and demographic shifts have elevated the importance of RAISA (robots, artificial intelligence, and service automation), and Generation Z for hospitality organisations. This study reviews 81 peer-reviewed articles using bibliometrics, quantitative frequency, and qualitative thematic analysis to examine Generation Z's engagement with RAISA in hospitality services. The findings highlight the increasing prevalence of service robots in hospitality sectors, with other AI and smart technologies remaining underexplored. While prior studies focused on Generation Z consumers' RAISA usage intentions, they overlooked the perspectives of Generation Z employees and hospitality operators. Furthermore, prior studies were mostly quantitative and geographically constrained, and focused on examining existing technology acceptance models, thereby lacking cross-cultural, in-depth, and mixed-methods exploration. Accordingly, this review paper proposes future research directions, and a novel service encounter paradigm. The paper also suggests hospitality operators proactively adopt RAISA technologies and prioritise Generation Z to aid sustainable operations.

That Other Europe: The Conceptualization of Central and Eastern Europe in (Higher) Education Research from 1990 to 2000

This paper endeavours to interrogate the early conceptualization of the notion of Central and Eastern Europe in the field of (higher) education by analysing the academic scholarship in (higher) education research from 1990 to 2000. The results of this analysis elucidate the emergence of Central and Eastern Europe as a research unit in the field of (higher) education. Central and Eastern Europe emerges as a conceptual cluster comprised of Central and Eastern Europe, Eastern Europe and Central Europe. A preliminary quantitative analysis of frequency of use of particular concept and country distribution showed that different terms were used interchangeably and the same countries were referred to as belonging to different regions. Close reading of the articles in the research corpus revealed that the regional cluster was conceptualized as a post-communist space which was unified by its unwillingly shared past or via the role it can play vis-à-vis the rest of Europe, or “the West”.

Analysis of values reflected in "People's Daily Online" from 2020 to 2022

In this study, the object is the official website "People's Daily Online," and the subject is the values represented in the materials published on this site from 2020 to 2022. When examining the values in "People's Daily Online," we identify the following key values from contemporary Chinese values: "patriotism" and "collectivism," which prioritize the interests of the state and the collective; the spirit of "selfless service"; "friendliness" as a combination of "respect, tolerance, accommodation, care, and mutual assistance"; "diligence and frugality" as family values; professional values based on "devotion to work" and aligned with the demands of the times (in this study, we use the term "people pursuing their dreams," proposed by President Xi Jinping, to denote professional values). Ideas that contradict these core values include "selfishness," "malice," "laziness," "greed," etc. The study of values and value conflicts in "People's Daily Online" (2020-2022) involved collecting and classifying materials, identifying keywords using Anaconda, conducting a quantitative analysis of term frequency and co-occurrence, as well as a qualitative analysis of articles to determine their value orientations. The scientific novelty of this study lies in a comprehensive analysis of values reflected in leading Chinese media, using the example of "People's Daily Online" from 2020 to 2022. The research holds significant political and social importance as it contributes to a deeper understanding of the value orientations of the Chinese government and its information dissemination strategies. It reveals the mechanisms through which media shape public opinion and social identity. From an academic perspective, the study enriches media and communication theory, especially in the context of its application outside the North American environment. An international perspective can serve as a guide for other countries, helping them better understand and effectively address the challenges of information dissemination and value competition in the era of globalization. The findings of the study show that "People's Daily Online" actively fulfills the role of a leading media outlet in shaping a favorable ideological atmosphere within a socialist framework.

THÌ and LÀ Constructions in Vietnamese: A Study on Argument Structures

This study aims to shed light on the argument structure of the Vietnamese particles THÌ and LÀ, which function as markers of focused constituents and topic-comment structures, respectively. The research objectives are to identify the syntactic and semantic properties of constructions involving THÌ and LÀ, and to analyze their argument structures within the theoretical frameworks of construction grammar. Specifically, the constructional approach (Goldberg 1995, 2006) and radical construction grammar (Croft 2001) will be employed. The methodology involves collecting a corpus of naturally occurring data from various written sources. The data will undergo qualitative analysis to identify argument structure patterns associated with THÌ and LÀ constructions, as well as quantitative analysis of frequency and distribution. The expected findings will provide insights into the argument structures of these Vietnamese constructions, elucidating how focused constituents and topic-comment structures are marked. The study will evaluate the applicability of the chosen theoretical frameworks in accounting for the observed patterns. The findings have potential applications in natural language processing tasks requiring accurate recognition and interpretation of focused constituents and topic-comment structures, such as information extraction, machine translation, and language generation. Furthermore, the study may inform language teaching and acquisition by shedding light on the usage patterns of THÌ and LÀ in Vietnamese. The analysis is expected to contribute to a deeper understanding of argument structures in Vietnamese and potentially motivate extensions or modifications to the theoretical frameworks.

Lexical Expressions of Motion in Physical Environments a Cognitive Linguistics Perspective

This study aims to delve into the interaction between motion verbs, manners, and paths in the Vietnamese language to look at the lexicalization of motion occurrences. Utilizing Talmy's lexicalization patterns for cognitive linguistics, the study seeks to understand how Vietnamese encodes and conceptualizes motion events in a variety of physical contexts, such as the air, water, and land. A mixed-methods approach is used in this work, integrating qualitative analysis of annotated textual data with quantitative frequency analysis. Vietnamese has a rich system of motion verbs that may be paired with manner and path expressions to produce complex and subtle descriptions of movement, according to the research. The language displays intricate differences when describing the direction, velocity, and kind of vehicle of motion, in addition to various linear, curved, vertical, circular, and multidirectional routes. The complex interplay between language, cognition, and the embodied experience of motion is highlighted by this linguistic variety, which is a reflection of Vietnamese speakers' astute observation and interpretation of the physical world. The work adds to our knowledge of how language organizes and expresses the basic idea of motion and provides insights into the cognitive and cultural bases of language expression.

A Quantitative and Qualitative Exploration of Futuristic Narratives on TVTropes.org

This paper embarks on a methodical exploration of TVTropes.org, a comprehensive crowd-sourced wiki that documents storytelling conventions across various forms of media, with a special focus on representations of artificial intelligence and future scenarios. The study delineates the multifaceted nature of the platform, asserting that its offerings extend beyond mere television tropes, and explores its potent applicability for futurists and scholars. Through the strategic application of web scraping and data analysis, this research quantifies diverse aspects of science fiction media and the embedded tropes therein. The paper underscores the pivotal role of tropes in shaping societal perceptions and influencing discourse, particularly in the realm of futuristic thinking, using instances such as the impact of “The Terminator” franchise on military strategic thinking as a case study. Furthermore, the research engages in a quantitative analysis of trope density and frequency within science fiction works, offering a nuanced understanding and uncovering patterns in storytelling conventions. This study thus offers a foundational framework for understanding, categorizing, and analyzing the influential images of the future that permeate today’s media environment, thereby providing a valuable resource for futurists, researchers, and media scholars in their respective endeavors.

Simulation of ultrasonic scattering from scatterer size distributions using Field II.

Quantitative analysis of radio frequency (RF) signals obtained from ultrasound scanners can yield objective parameters that are gaining clinical relevance as imaging biomarkers. These include the backscatter coefficient (BSC) and the effective scatterer diameter (ESD). Biomarker validation is typically performed in phantoms which do not provide the flexibility of systematic variation of scattering properties. Computer simulations, such as those from the ultrasound simulator Field II, can allow more flexibility. However, Field II does not allow simulation of RF data from a distribution of scatterers with finite size. In this work, a simulation method is presented which builds upon previous work by including Faran theory models representative of distributions of scatterer size. These are systematically applied to RF data simulated in Field II. The method is validated by measuring the root mean square error of the estimated BSC and percent bias of the ESD and comparing to experimental results. The results indicate the method accurately simulates distributions of scatterer sizes and provides scattering similar to that seen in data from clinical scanners. Because Field II is widely used by the ultrasound community, this method can be adopted to aid in validation of quantitative ultrasound imaging biomarkers.

Superficial Dosimetry Study of the Frequency of Bolus Using in Volumetric Modulated Arc Therapy after Modified Radical Mastectomy.

To investigate the effect of various frequencies of bolus use on the superficial dose of volumetric modulated arc therapy after modified radical mastectomy for breast cancer. Based on the computed tomography images of a female anthropomorphic breast phantom, a 0.5 cm silicone-based 3D-printed bolus was created. Nine points evenly distributed on the breast skin were selected for assessing the skin dose, and a volume of subcutaneous lymphatic drainage of the breast (noted as ROI2-3) was delineated for assessing the chest wall dose. The treatment plans with and without bolus (plan_wb and plan_nb) were separately designed using the prescription of 50 Gy in 25 fractions following the standard dose constraints of the adjacent organ at risk. To characterize the accuracy of treatment planning system (TPS) dose calculations, the doses of the nine points were measured five times by thermoluminescence dosimeters (TLDs) and then were compared with the TPS calculated dose. Compared with Plan_nb (144.46 ± 10.32 cGy), the breast skin dose for plan_wb (208.75 ± 4.55 cGy) was significantly increased (t = -18.56, P < 0.001). The deviation of skin dose was smaller for Plan_wb, and the uniformity was significantly improved. The calculated value of TPS was in good agreement with the measured value of TLD, and the maximum deviation was within 5%. Skin and ROI2-3 doses were significantly increased with increasing frequencies of bolus applications. The mean dose of the breast skin and ROI2-3 for 15 and 23 times bolus applications were 45.33 Gy, 50.88 Gy and 50.36 Gy, 52.39 Gy, respectively. 3D printing bolus can improve the radiation dose and the accuracy of the planned dose. Setting Plan_wb to 15 times for T1-3N+ breast cancer patients and 23 times for T4N+ breast cancer patients can meet the clinical need. Quantitative analysis of the bolus application frequency for different tumor stages can provide a reference for clinical practice.

Research on the ideologic and politic education of college students based on big data analysis

Abstract This paper firstly researches the ideological and political education in higher education institutions in the background of the big data era and puts forward the innovation strategy of ideological and political education mode in higher education institutions in the big data era. Secondly, it studies the application of data mining technology in colleges and universities for ideological and political education. Based on data mining technology, the data on ideological and political education is determined by the clustering algorithm, followed by a quantitative examination of the policy text of ideological and political education of colleges and universities by calculating the quantitative statistical analysis of policy text, word frequency, and word cloud analysis. Then, the research subjects were selected, and the initial data were obtained using questionnaires, further pre-processing, and further empirical analysis of ideological and political education based on data mining technology. The consequences show that the proportions contained in the three types of score bands, namely 17.99%, 59.38% and 9.96%, basically match with the sample proportions accounted for by the three types of grades assessed by clustering, namely 30.51%, 62.02% and 8.47%, which confirms that such a model of data mining adopted according to the quantitative table of ideologic and politic education assessment in higher education institution is a very successful model. This study contributes to the innovation of online ideological and political education work in higher education institutions in the context of big data.

High-resolution Brillouin light scattering study on Ti/Au/Co/Ni multilayer

The topic of this paper addresses the Brillouin light scattering (BLS) study of the spin-wave and surface acoustic wave dynamics in the multilayer consisting of Ti/Au/Co/Ni deposited on Si substrate. We make the quantitative analysis of spin-wave frequency under a range of wave vectors to determine the dispersion relation and to study the effect of the magnetic field. These findings were correlated with theoretical models to determine the magnetic system parameters, such as magnetization, Lande g factor, exchange stiffness constant etc. In addition to this, we have conducted finite element method based simulations to understand the nature of surface phonons and to determine the elastic tensor parameters for the Ti/Au/Co/Ni layer from the fitting of simulation results with the experiment data points.

Monitoring of antimicrobial usage among adult bovines in dairy herds of Punjab, India: A quantitative analysis of pattern and frequency.

The present study aimed to evaluate the antimicrobial usage (AMU) pattern in dairy herds of Punjab, India. The on-farm quantification of AMU in adult bovine animals by the manual collection of empty drug containers ("bin method") along with the records of the treatment was carried out in 38 dairy farms involving 1010 adult bovines for 1 year from July 2020 to June 2021. The farm owners were asked to record the antibiotic treatments as well as to deposit empty antibiotic packaging/vials into the provided bins placed at the farms. A total of 14 different antibiotic agents in 265 commercial antibiotic products were administered to the dairy herds during the study. A total of 179 (67.55%) administered products contained antimicrobials of "critical importance" as per the World Health Organization (WHO). Mastitis (54.72%), followed by the treatment of fever (19.62%), reproductive problems (15.47%), and diarrhea (3.40%) accounted for the majority of drugs administered in the herds during the study period. The most commonly used antibiotics were enrofloxacin (89.47% herds; 21.51% products), followed by ceftriaxone (50% herds; 12.83% products), amoxicillin (50% herds; 12.83% products), oxytetracycline (55.26% herds; 11.70% products), and procaine penicillin (47.37% herds; 12.83% products). The highest quantity of AMU [in terms of antimicrobial drug use rate (ADUR)] was observed for ceftiofur, followed by ceftriaxone, procaine benzyl penicillin ceftizoxime, enrofloxacin, cefoperazone, amoxicillin and ampicillin. A total of 125 (47.17%) products contained "highest priority critically important antimicrobials" (HPCIA) and 54 (20.37%) products contained "high priority critically important antimicrobials". In terms of overall number of animal daily doses (nADD), the highest priority critically important antimicrobials (HPCIA) of the WHO such as third-generation cephalosporins and quinolones, respectively accounted for 44.64 and 22.35% of the total antibiotic use in the herds. The bin method offers an alternative to monitoring AMU as a more accessible approach for recording the actual consumption of antimicrobials. The present study, to the best of our knowledge, is the first of its kind to provide an overview of the qualitative and quantitative estimate of AMU among adult bovines from India.

Development of a Novel Quantitative Risk Assessment Tool for UK Road Tunnels

Some of the most critical transportation infrastructures are road tunnels. Underground passageways for motorists are provided through this cost-effective engineering solution, which allows for high traffic volumes. A crucial aspect of the operation of road tunnels is fire safety. Risk assessments have been established to ensure the level of safety in tunnels. As the existing quantitative risk analysis (QRA) models are inapplicable to assess the fire risk in UK road tunnels, this paper presents a novel QRA model, named LBAQRAMo, for UK road tunnels. This model consists of two main sections: quantitative frequency analysis, to estimate the frequency of fire incidents via an event tree; and quantitative consequences analysis, to model the consequences of fire incidents. LBAQRAMo covers the risk to tunnel users. The result of the risk analysis is the expected value of the societal risk of the investigated tunnel, presented via F/N curve. Another major result of this model is the estimation of the number of fatalities for each scenario based on the comparison between required safe egress time (RSET) and available safe egress time (ASET). Risk evaluation was carried out by comparison of the tunnel under study with the UK ALARP limit. The operation of the model is demonstrated by its application to the Gibraltar Airport Tunnel as a case study. Simulation of 34 different possible scenarios show that the tunnel is safe for use. The sensitivity of the model to HGV fire incident frequency and basic pre-movement times was studied as well.

Characterizing Student-Driven Research Investigations Contributed to the GLOBE Program Citizen Science Initiative in a Formal Education Context

The Global Learning and Observations to Benefit the Environment (GLOBE) Program offers citizen science opportunities to participants of all ages, with a focus on youth in formal classroom contexts. This study uses student investigation research reports and posters submitted to the 2018 International Virtual Science Symposium (IVSS) and Student Research Symposium (SRS) as testbeds for characterizing student-driven Earth system citizen science investigations. Secondarily, this study aimed to capture GLOBE’s alignment to existing citizen science outcomes frameworks in the literature, which have primarily focused on adults and non-formal settings. Based on a literature review, the evaluation team identified 89 potential characteristics in 27 categories to typify investigations from both formal education and citizen science perspectives. We coded the artifacts from 207 student projects, conducted quantitative analysis of frequencies, and performed a semantic network analysis. By using this networking approach, we conceptually mapped several clusters of co-occurring characteristics, defining a descriptive framework for GLOBE projects. We identified three tiers of citizen science projects, increasing in the sophistication of participants’ demonstrated science practices. The framework includes additional components that reflect student citizen scientists’ thoughtfulness and connection to context as well as their projects’ reflection of their motivation and self-efficacy. Through these findings, we have identified areas where student citizen scientists would benefit from further support, and suggest here further research to incorporate the experiences of students into the broader understanding of citizen science outcomes.

Is there no "I" in team? Potential bias in key informant interviews when asking individuals to represent a collective perspective.

This paper sought to understand the extent to which, and how individuals use personal or collective language when asked to articulate sense of place from a collective perspective. Understanding a collective sense of place could illuminate place-based connections in natural resource industries, where it is as groups or as institutions that organizations interact with the environment rather than as individuals. While there are well known methods for collecting information about sense of place at the individual level, there is a gap in understanding the best method to collect information at a collective level. We examined the use of key-informant interviews as a method to understand collective sense of place. In Bocas del Toro, Panama, ecotourism and environmentally based organizations are becoming more prolific due to abundant natural resources, making it an interesting case study for understanding sense of place from an organizational perspective. The use of personal and collective language is examined though in-depth semi-structured interviews from 15 environmentally-oriented organizations with a total of 17 interviews. This study specifically examined whether and how key informants, when prompted to speak for their organization, spoke collectively, reflecting a collective perspective versus their own. Methods included both quantitative analysis of personal versus collective language use frequency, and qualitative examinations of how individuals used personal versus collective language. Our results indicated no difference in the frequency with which individuals use personal versus collective language. We found that how individuals situated their perspectives into an organization reflects a complex personal and collective point of view reflecting five themes of personal versus collective language use: 1) sole personal perspective, 2) sole collective perspective, 3) distinction between collective and personal perspective; 4) organization perspective with insertion of “I think”; and 5) personal and collective perspective about organization and greater community. Our research identifies a previously undiscussed potential bias of key informant interviews. These findings have implications for how researchers approach collecting information beyond the individual level.

Quantitative analysis of fundamental frequency in Spanish (L2) and Brazilian Portuguese (L1)

This paper analyzes the intonation of Spanish and Brazilian Portuguese (BP) produced by monolingual speakers of both languages and bilingual BP speakers that lived in Spain on average for 6 years. Bilinguals produced data in both Spanish L2 (BL2) and BP L1 (BL1). Speech materials are sentences in different modalities (declaratives, yes-no and wh-questions) and reading styles (isolated sentences and storytelling). Fundamental frequency (f0) contours were analyzed to assess learning in Spanish L2 and language attrition in the L1 production of bilinguals. Variability in the f0 contours of the four language conditions was gauged by means of three indices (peak rate, peak range and global standard deviation). Dynamic time warping (DTW) distances between pairs of f0 contours were also measured as a way to measure within- and between-language differences in intonation patterns. The main results are: 1) BL2 and BL1 contours are significantly more variable than the monolingual ones both quantitatively and qualitatively; 2) BL2 contours partially converge towards the patterns of Spanish monolinguals, showing that there is learning; 3) there is evidence for language attrition in the form of transfer of Spanish patterns to BP contours produced by bilinguals; 4) Learning and attrition levels are different depending on sentence modality, such that learning is greater in modalities that differ less between BP and Spanish and attrition is greater in modalities that differ the most.

What Is Most Desirable for Nature? An Analysis of Azorean Pupils’ Biodiversity Perspectives When Deciding on Ecological Scenarios

Understanding pupils’ biodiversity perspectives is essential to developing educators’ sensitivity to students’ multi-faceted views of the world, thus increasing teaching effectiveness. In this study, we asked 1528 school pupils in the Azores to choose between alternative schemes in three ecological scenarios and to justify their decisions. The study’s objectives were to understand biodiversity perspectives underlying pupils’ choice of the most desirable schemes for nature and to examine whether gender and school level (middle school/high school) influenced their choices. Quantitative (frequency analysis and Chi-square statistics) and qualitative (thematic analysis) methods were applied for data analysis. The majority of pupils made appropriate choices, arguing from different biodiversity perspectives, which were classified in 10 categories and 24 subcategories. High school pupils did not exhibit significant differences among the main arguments employed, and mostly referred to ecological concepts, while middle school pupils exhibited different choices according to gender, emphasizing richness over the threats posed by introduced species. Biodiversity education should thus be strengthened, especially at the middle school level, where different complex issues would benefit from classroom discussion and systematization. The chosen methodological strategy proved to be effective in assessing pupils’ biodiversity perspectives, which may be useful to deal with other ill-structured problems.

The invisible minority: why do textbook authors avoid people with disabilities in their books?

ABSTRACT Representation of disability in school textbooks may influence pupils’ knowledge and perceptions of people with disabilities. The aim of this study was to investigate representation of people with disabilities in school textbooks. The study employed a mixed-methods approach. Quantitative frequency analysis was used to investigate the extent of representation of disabilities in texts and pictures in 78 Norwegian textbooks for Grades 5–10. Regarding texts, the results showed that people with disabilities were represented in less than half of these textbooks (49%). Concerning pictures, people with disabilities were even less represented, appearing in only 29% of the textbooks. These quantitative findings were supplemented by a qualitative survey of textbook authors, who were asked to explain the marked absence of disability references in their own books and in school textbooks in general. The two most frequent explanations were that textbook authors had either overlooked people with disabilities, or that the Norwegian National Curriculum (Kunnskapsdepartementet 2006. Lærerplanverket for Kunnskapsløftet (LK06) [The Norwegian National Curriculum]. https://www.udir.no/lk20/overordnet-del/) did not explicitly mention this minority. We discuss these explanations as expressions of conscious considerations rather than unconscious omissions.