skip to main content
US FlagAn official website of the United States government
dot gov icon
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
https lock icon
Secure .gov websites use HTTPS
A lock ( lock ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.


Title: New Methods and the Study of Vulnerable Groups: Using Machine Learning to Identify Immigrant-Oriented Nonprofit Organizations
Many migrants are vulnerable due to noncitizenship, linguistic or cultural barriers, and inadequate safety-net infrastructures. Immigrant-oriented nonprofits can play an important role in improving immigrant well-being. However, progress on systematically evaluating the impact of nonprofits has been hampered by the difficulty in efficiently and accurately identifying immigrant-oriented nonprofits in large administrative data sets. We tackle this challenge by employing natural language processing (NLP) and machine learning (ML) techniques. Seven NLP algorithms are applied and trained in supervised ML models. The bidirectional encoder representations from transformers (BERT) technique offers the best performance, with an impressive accuracy of .89. Indeed, the model outperformed two nonmachine methods used in existing research, namely, identification of organizations via National Taxonomy of Exempt Entities codes or keyword searches of nonprofit names. We thus demonstrate the viability of computer-based identification of hard-to-identify nonprofits using organizational name data, a technique that may be applicable to other research requiring categorization based on short labels. We also highlight limitations and areas for improvement.  more » « less
Award ID(s):
2017044
PAR ID:
10323288
Author(s) / Creator(s):
;
Date Published:
Journal Name:
Socius: Sociological Research for a Dynamic World
Volume:
8
ISSN:
2378-0231
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
More Like this
  1. Nonprofits provide a range of human and social services in the United States, producing what some call the delegated welfare state. The authors aim to quantify inequities in nonprofit service provision by focusing on two types of vulnerabilities: spatial and socio-demographic. Specifically, the authors develop a service accessibility index to identify mismatch between population demand and locational supply of nonprofits. The authors apply the index to an original data set of more than 1,500 immigrant-serving legal and health organization in California, Nevada, and Arizona. The authors find that immigrants living in rural areas are underserved, especially in access to justice, compared with those in metropolitan areas but that residents of smaller cities have better access, especially to health services, than those in larger cities. The service accessibility index not only brings such inequities into relief but raises critical questions about the determinants and consequences of service-access variability, for vulnerable immigrants and others dependent on the nonprofit safety net. 
    more » « less
  2. Objective To determine if natural language processing (NLP) and machine learning (ML) techniques accurately identify interview-based psychological stress and meaning/purpose data in child/adolescent cancer survivors. Materials and Methods Interviews were conducted with 51 survivors (aged 8-17.9 years; ≥5-years post-therapy) from St Jude Children’s Research Hospital. Two content experts coded 244 and 513 semantic units, focusing on attributes of psychological stress (anger, controllability/manageability, fear/anxiety) and attributes of meaning/purpose (goal, optimism, purpose). Content experts extracted specific attributes from the interviews, which were designated as the gold standard. Two NLP/ML methods, Word2Vec with Extreme Gradient Boosting (XGBoost), and Bidirectional Encoder Representations from Transformers Large (BERTLarge), were validated using accuracy, areas under the receiver operating characteristic curves (AUROCC), and under the precision-recall curves (AUPRC). Results BERTLarge demonstrated higher accuracy, AUROCC, and AUPRC in identifying all attributes of psychological stress and meaning/purpose versus Word2Vec/XGBoost. BERTLarge significantly outperformed Word2Vec/XGBoost in characterizing all attributes (P <.05) except for the purpose attribute of meaning/purpose. Discussion These findings suggest that AI tools can help healthcare providers efficiently assess emotional well-being of childhood cancer survivors, supporting future clinical interventions. Conclusions NLP/ML effectively identifies interview-based data for child/adolescent cancer survivors. 
    more » « less
  3. Modern machine learning (ML) systems demand substantial training data, often resorting to external sources. Nevertheless, this practice renders them vulnerable to backdoor poisoning attacks. Prior backdoor defense strategies have primarily focused on the identification of backdoored models or poisoned data characteristics, typically operating under the assumption of access to clean data. In this work, we delve into a relatively underexplored challenge: the automatic identification of backdoor data within a poisoned dataset, all under realistic conditions, i.e., without the need for additional clean data or without manually defining a threshold for backdoor detection. We draw an inspiration from the scaled prediction consistency (SPC) technique, which exploits the prediction invariance of poisoned data to an input scaling factor. Based on this, we pose the backdoor data identification problem as a hierarchical data splitting optimization problem, leveraging a novel SPC-based loss function as the primary optimization objective. Our innovation unfolds in several key aspects. First, we revisit the vanilla SPC method, unveiling its limitations in addressing the proposed backdoor identification problem. Subsequently, we develop a bi-level optimization-based approach to precisely identify backdoor data by minimizing the advanced SPC loss. Finally, we demonstrate the efficacy of our proposal against a spectrum of backdoor attacks, encompassing basic label-corrupted attacks as well as more sophisticated clean-label attacks, evaluated across various benchmark datasets. Experiment results show that our approach often surpasses the performance of current baselines in identifying backdoor data points, resulting in about 4%-36% improvement in average AUROC. 
    more » « less
  4. This research paper systematically identifies the perceptions of learning machine learning (ML) topics. To keep up with the ever-increasing need for professionals with ML expertise, for-profit and non-profit organizations conduct a wide range of ML-related courses at undergraduate and graduate levels. Despite the availability of ML-related education materials, there is lack of understanding how students perceive ML-related topics and the dissemination of ML-related topics. A systematic categorization of students' perceptions of these courses can aid educators in understanding the challenges that students face, and use that understanding for better dissemination of ML-related topics in courses. The goal of this paper is to help educators teach machine learning (ML) topics by providing an experience report of students' perceptions related to learning ML. We accomplish our research goal by conducting an empirical study where we deploy a survey with 83 students across five academic institutions. These students are recruited from a mixture of undergraduate and graduate courses. We apply a qualitative analysis technique called open coding to identify challenges that students encounter while studying ML-related topics. Using the same qualitative analysis technique we identify quality aspects do students prioritize ML-related topics. From our survey, we identify 11 challenges that students face when learning about ML topics, amongst which data quality is the most frequent, followed by hardware-related challenges. We observe the majority of the students prefer hands-on projects over theoretical lectures. Furthermore, we find the surveyed students to consider ethics, security, privacy, correctness, and performance as essential considerations while developing ML-based systems. Based on our findings, we recommend educators who teach ML-related courses to (i) incorporate hands-on projects to teach ML-related topics, (ii) dedicate course materials related to data quality, (iii) use lightweight virtualization tools to showcase computationally intensive topics, such as deep neural networks, and (iv) empirical evaluation of how large language models can be used in ML-related education. 
    more » « less
  5. Natural language processing (NLP) has gained widespread adoption in the development of real-world applications. However, the black-box nature of neural networks in NLP applications poses a challenge when evaluating their performance, let alone ensuring it. Recent research has proposed testing techniques to enhance the trustworthiness of NLP-based applications. However, most existing works use a single, aggregated metric (i.e., accuracy) which is difficult for users to assess NLP model performance on fine-grained aspects, such as LCs. To address this limitation, we present ALiCT, an automated testing technique for validating NLP applications based on their LCs. ALiCT takes user-specified LCs as inputs and produces diverse test suite with test oracles for each of given LC. We evaluate ALiCT on two widely adopted NLP tasks, sentiment analysis and hate speech detection, in terms of diversity, effectiveness, and consistency. Using Self-BLEU and syntactic diversity metrics, our findings reveal that ALiCT generates test cases that are 190% and 2213% more diverse in semantics and syntax, respectively, compared to those produced by state-of-the-art techniques. In addition, ALiCT is capable of producing a larger number of NLP model failures in 22 out of 25 LCs over the two NLP applications. 
    more » « less