Say It My Way: Exploring Control in Conversational Visual Question Answering with Blind Users
Organizations: University of Maryland, College Park, Maryland, USA · University of Texas at Austin, Austin, Texas, USA
Abstract
Prompting and steering techniques are well established in general-purpose generative AI, yet assistive visual question answering (VQA) tools for blind users still follow rigid interaction patterns with limited opportunities for customization. User control can be helpful when system responses are misaligned with their goals and contexts, a gap that becomes especially consequential for blind users that may rely on these systems for access. We invite 11 blind users to customize their interactions with a real-world conversational VQA system. Drawing on 418 interactions, reflections, and post-study interviews, we analyze prompting-based techniques participants adopted, including those introduced in the study and those developed independently in real-world settings. VQA interactions were often lengthy: participants averaged 3 turns, sometimes up to 21, with input text typically tenfold shorter than the responses they heard. Built on state-of-the-art LLMs, the system lacked verbosity controls, was limited in estimating distance in space and time, relied on inaccessible image framing, and offered little to no camera guidance. We discuss how customization techniques such as prompt engineering can help participants work around these limitations. Alongside a new publicly available dataset, we offer insights for interaction design at both query and system levels.
Figures & tables
| PID | Blindness | Age | Gender | Education | Occupation | AI Fam* | Related Assistive Tech |
|---|---|---|---|---|---|---|---|
| P1 | total | 30 | W | associate | full-time parent | 1 | Be My Eyes |
| P2 | legal | 39 | W | high school | customer service representative | 3 | Seeing AI; Be My Eyes; Aira |
| P3 | total | 52 | W | some college | not employed | 3 | Be My Eyes; Seeing AI |
| P4 | total | 38 | W | high school | not employed | 2 | Be My Eyes |
| P5 | legal | 53 | W | master | not employed | 3 | - |
| P6 | legal | 31 | W | some college | assistant technology tutor | 3 | Be My AI; Aira; Meta Glasses |
| Technique | Definition in GenAI | Definition in our use case | Example used |
|---|---|---|---|
| Binary Feedback | Feedback that indicate positive or negative rewards ( Ouyang et al., 2022 ) . | Users provide a simple positive or negative feedback with the response | "Helpful/Not helpful." |
| Zero-shot: Style Prompting | Prompt to specify desired stylistic attributes of GenAI output (e.g., tone and genre) ( Lu et al., 2023 ) . | Users prompt to specify desired style to adjust following responses. | "More/Less detail." |
| Zero-shot: Intention Prompting * | Emotion prompt that incorporates phrases of psychological relevance to humans ( Li et al., 2023 ) . | Users express their goals to guide systems tailor responses based on the task context. | "I want to gain muscle. Is this a good option of food?" |
| CoT Prompting | Offer reasoning behind to guide GenAI systems ( Patel et al., 2022 ; Wei et al., 2022 ) . | Users prompt with reasoning for desirable or undesirable answers. | "I only care about finding the soup box, so do not mention about other items." |
| Image-as-text Prompting | Generate a textual description of image(s), enabling easy inclusion into a text-based prompt ( Hakimov and Schlangen, 2023 ) . | Users prompt with visual characteristics of objects or scenes, allowing systems to complete tasks with additional information. | "Find my keys with a keychain that is green, round, and with raised letters." |
This is very helpful, because the app itself is not sufficiently accessible to me using VoiceOver on my iPhone as a blind user.'' 2) Chain-of-thought and decomposition prompting: participant broke down his goal of assessing vacuuming progress into multiple prompts. First, he asked for factual details such as the area cleaned and the battery level. Then he followed up with an inference question, If that number (the battery level) is low, and based on the purple coloration (cleaned area) of each room on that floor, is it reasonable for me to assume that it is largely or even completely done?'' 3) explicitly mentioned blindness: in the same prompt as binary feedback one.Appendix figures & tables1 asset
Supplementary material from the paper’s appendix.
Appendix
| Question Types | Definition | Example Questions |
|---|---|---|
| Description Questions (40.38% * ) | Questions asked for the description of a picture or the visual characteristics of an object or a scene. | “Is anyone sitting on the bench?” “What color are the pillows on the couch?” “Please just describe in the greatest possible detail the picture [on the screenshot].” |
| Reading Questions (20.33%) | Questions asked for reading text or looking for information based on text. | “I need to know who the sender is.” “What is written on the door?” “May you read me the setup instructions?” |
| Localization Questions (9.62%) | Questions asked for the location or spatial relation of objects. | “Where is the ID card?” “Help me find the remote.” “From where I am, how far is the dumpster and is it to my left or right?” |
| Identification Questions (8.79%) | Questions asked for identifying an object by name or type ( Brady et al., 2013 ) . | “What is it?” “What is in the boxes?” “What’s the Stonyfield’s product? Is it yogurt” |
| Unanswerable Questions (5.49% unanswerable till the end) | Questions that cannot be answered based on the information included in previous images in the interaction. | – |