2026-07-08 08:57:50 +00:00

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# A-OKVQA
## Overview
A-OKVQA (Augmented OK-VQA) is a benchmark designed to evaluate commonsense reasoning and external world knowledge in visual question answering. It extends beyond basic VQA tasks that rely solely on image content, requiring models to leverage a broad spectrum of commonsense and factual knowledge about the world.
## Task Description
- **Task Type**: Visual Question Answering with Knowledge Reasoning
- **Input**: Image + natural language question requiring external knowledge
- **Output**: Answer (multiple-choice or open-ended)
- **Domains**: Commonsense reasoning, factual knowledge, visual understanding
## Key Features
- Requires commonsense reasoning beyond direct visual observation
- Combines visual understanding with external world knowledge
- Includes both multiple-choice and open-ended question formats
- Questions annotated with rationales explaining the reasoning process
- More challenging than standard VQA benchmarks
## Evaluation Notes
- Default evaluation uses the **validation** split
- Primary metric: **Accuracy** for multiple-choice questions
- Uses Chain-of-Thought (CoT) prompting for better reasoning
- Questions require reasoning beyond what is directly visible in images
## Properties
| Property | Value |
|----------|-------|
| **Benchmark Name** | `a_okvqa` |
| **Dataset ID** | [HuggingFaceM4/A-OKVQA](https://modelscope.cn/datasets/HuggingFaceM4/A-OKVQA/summary) |
| **Paper** | N/A |
| **Tags** | `Knowledge`, `MCQ`, `MultiModal` |
| **Metrics** | `acc` |
| **Default Shots** | 0-shot |
| **Evaluation Split** | `validation` |
## Data Statistics
| Metric | Value |
|--------|-------|
| Total Samples | 1,145 |
| Prompt Length (Mean) | 310.84 chars |
| Prompt Length (Min/Max) | 276 / 405 chars |
**Image Statistics:**
| Metric | Value |
|--------|-------|
| Total Images | 1,145 |
| Images per Sample | min: 1, max: 1, mean: 1 |
| Resolution Range | 305x229 - 640x640 |
| Formats | jpeg |
## Sample Example
**Subset**: `default`
```json
{
"input": [
{
"id": "3d2b0351",
"content": [
{
"text": "Answer the following multiple choice question. The last line of your response should be of the following format: 'ANSWER: [LETTER]' (without quotes) where [LETTER] is one of A,B,C,D. Think step by step before answering.\n\nWhat is in the motorcyclist's mouth?\n\nA) toothpick\nB) food\nC) popsicle stick\nD) cigarette"
},
{
"image": "[BASE64_IMAGE: jpeg, ~53.4KB]"
}
]
}
],
"choices": [
"toothpick",
"food",
"popsicle stick",
"cigarette"
],
"target": "D",
"id": 0,
"group_id": 0,
"metadata": {
"question_id": "22jbM6gDxdaMaunuzgrsBB",
"direct_answers": "['cigarette', 'cigarette', 'cigarette', 'cigarette', 'cigarette', 'cigarette', 'cigarette', 'cigarette', 'cigarette', 'cigarette']",
"difficult_direct_answer": false,
"rationales": [
"He's smoking while riding.",
"The motorcyclist has a lit cigarette in his mouth while he rides on the street.",
"The man is smoking."
]
}
}
```
## Prompt Template
**Prompt Template:**
```text
Answer the following multiple choice question. The last line of your response should be of the following format: 'ANSWER: [LETTER]' (without quotes) where [LETTER] is one of {letters}. Think step by step before answering.
{question}
{choices}
```
## Usage
### Using CLI
```bash
evalscope eval \
--model YOUR_MODEL \
--api-url OPENAI_API_COMPAT_URL \
--api-key EMPTY_TOKEN \
--datasets a_okvqa \
--limit 10 # Remove this line for formal evaluation
```
### Using Python
```python
from evalscope import run_task
from evalscope.config import TaskConfig
task_cfg = TaskConfig(
model='YOUR_MODEL',
api_url='OPENAI_API_COMPAT_URL',
api_key='EMPTY_TOKEN',
datasets=['a_okvqa'],
limit=10, # Remove this line for formal evaluation
)
run_task(task_cfg=task_cfg)
```