Matching Items (4)
Description
Learning to accomplish complex tasks may require a tight coupling among different levels of cognitive functions or components, like perception, acting, planning, and self-explaining. One may need a coupling between perception and acting components to make decisions automatically especially in emergent situations. One may need collaboration between perception and planning components to go with optimal plans in the long run while also drives task-oriented perception. One may also need self-explaining components to monitor and improve the overall learning. In my research, I explore how different cognitive functions or components at different levels, modeled by Deep Neural Networks, can learn and adapt simultaneously. The first question that I address is: Can an intelligent agent leverage recognized plans or human demonstrations to improve its perception that may allow better acting? To answer this question, I explore novel ways to learn to couple perception-acting or perception-planning. As a cornerstone, I will explore how to learn shallow domain models for planning. Apart from these, more advanced cognitive learning agents may also be reflective of what they have experienced so far, either from themselves or from observing others. Likewise, humans may also frequently monitor their learning and draw lessons from failures and others' successes. To this end, I explore the possibility of motivating cognitive agents to learn how to self-explain experiences, accomplishments, and failures, to gain useful insights. By internally making sense of the past experiences, an agent could have its learning of other cognitive functions guided and improved.
ContributorsZha, Yantian (Author) / Kambhampati, Subbarao SK (Thesis advisor) / Li, Baoxin BL (Committee member) / Srivastava, Siddharth SS (Committee member) / Wang, Jianjun JW (Committee member) / Arizona State University (Publisher)
Created2022
Description
The field of computer vision has achieved tremendous progress over recent years with innovations in deep learning and neural networks. The advances have unprecedentedly enabled an intelligent agent to understand the world from its visual observations, such as recognizing an object, detecting the object's position, and estimating the distance to the object. It then comes to a question of how such visual understanding can be used to support the agent's decisions over its actions to perform a task. This dissertation aims to study this question in which several methods are presented to address the challenges in learning a desirable action policy from the agent's visual inputs for the agent to perform a task well. Specifically, this dissertation starts with learning an action policy from high dimensional visual observations by improving the sample efficiency. The improved sample efficiency is achieved through a denser reward function defined upon the visual understanding of the task, and an efficient exploration strategy equipped with a hierarchical policy. It further studies the generalizable action policy learning problem. The generalizability is achieved for both a fully observable task with local environment dynamic captured by visual representations, and a partially observable task with global environment dynamic captured by a novel graph representation. Finally, this dissertation explores learning from human-provided priors, such as natural language instructions and demonstration videos for better generalization ability.
ContributorsYe, Xin (Author) / Yang, Yezhou YY (Thesis advisor) / Ren, Yi YR (Committee member) / Pavlic, Theodore TP (Committee member) / Fan, Deliang DF (Committee member) / Srivastava, Siddharth SS (Committee member) / Arizona State University (Publisher)
Created2021
Description
The rapid increase in the volume and complexity of data lead to accelerated Artificial Intelligence (AI) applications, primarily as intelligent machines, in everyday life. Providing explanations is considered an imperative ability for an AI agent in a human-robot teaming framework, which provides the rationale behind an AI agent's decision-making. Therefore, the validity of the AI models is constrained based on their ability to explain their decision-making rationale. On the other hand, AI agents cannot perceive the social situation that human experts may recognize using their background knowledge, specifically in cybersecurity and the military. Social behavior depends on situation awareness, and it relies on interpretability, transparency, and fairness when we envision efficient Human-AI collaboration. Consequently, the human remains an essential element for planning, especially when the problem's constraints are difficult to express for an agent in a dynamic setting.
This dissertation will first develop different model-based explanation generation approaches to predict where the human teammate would misunderstand the plan and, therefore, generate an explanation accordingly. The robot's generated explanation or interactive explicable behavior maintains the human teammate's cognitive workload and increases the overall team situation awareness throughout human-robot interaction. Further, it will focus on a rule-based model to preserve the collaborative engagement of the team by exploring essential aspects of the facilitator agent design. In addition to recognizing wherein the plan might be discrepancies, focusing on the decision-making process provides insight into the reason behind the conflict between the human expectation and the robot's behavior. Employing a rule-based framework will shift the focus from assisting an individual (human) teammate to helping the team interactively while maintaining collaboration. Hence, concentrating on teaming provides the opportunity to recognize some cognitive biases that skew the teammate's expectations and affect interaction behavior.
This dissertation investigates how to maintain collaboration engagement or cognitive readiness for collaborative planning tasks. Moreover, this dissertation aims to lay out a planning framework focusing on the human teammate's cognitive abilities to understand the machine-provided explanations while collaborating on a planning task. Consequently, this dissertation explored the design for AI facilitator, helping a team tasked with a challenging task to plan collaboratively, mitigating the teaming biases, and communicate effectively. This dissertation investigates the effect of some cognitive biases on the task outcome and shapes the utility function. The facilitator's role is to facilitate goal alignment, the consensus of planning strategies, utility management, effective communication, and mitigate biases.
ContributorsZakershahrak, Mehrdad (Author) / Cooke, Nancy NC (Thesis advisor) / Zhang, Yu YZ (Thesis advisor) / Ben Amor, Hani HB (Committee member) / Srivastava, Siddharth SS (Committee member) / Hsiao, Sharon SH (Committee member) / Arizona State University (Publisher)
Created2021
Description
The growing presence of AI-driven systems in everyday life calls for the development of efficient methods to facilitate interactions between humans and AI agents. At the heart of these interactions lies the notion of trust, a key element shaping human behavior and decision-making. It is essential to foster a suitable level of trust to ensure the success of human-AI collaborations, while recognizing that excessive or misplaced trust can lead to unfavorable consequences. Human-AI partnerships face distinct hurdles, particularly potential misunderstandings about AI capabilities. This emphasizes the need for AI agents to better understand and adjust human expectations and trust. The thesis explores the dynamics of trust in human-robot interactions, acknowledging that the term encompasses human-AI interactions, and emphasizes the importance of understanding trust in these relationships. This thesis first presents a mental model-based framework that contextualizes trust in human-AI interactions, capturing multi-faceted dimensions often overlooked in computational trust studies. Then, I use this framework as a basis for developing decision-making frameworks that incorporate trust in both single and longitudinal human-AI interactions. Finally, this mental model-based framework enables the inference and estimation of trust when direct measures are not feasible.
ContributorsZahedi, Zahra (Author) / Kambhampati, Subbarao SK (Thesis advisor) / Chiou, Erin EC (Committee member) / Srivastava, Siddharth SS (Committee member) / Zhang, Yu YZ (Committee member) / Arizona State University (Publisher)
Created2023