chatbots编辑历史

# Chatbot

A chatbot is a software application designed to simulate human conversation through text or voice interactions, using natural language processing (NLP) and, increasingly, machine learning. First emerging in the 1960s with simple rule-based systems like ELIZA, chatbots have evolved into sophisticated AI-driven agents used for customer service, virtual assistance, entertainment, and education. Modern chatbots range from task-oriented assistants to open-domain conversational agents, often integrated into messaging platforms, websites, and smart devices.

## 1 Historical development

### 1.1 Early rule‑based systems (1960s–1990s)

#### 1.1.1 ELIZA and the Turing test
The first known chatbot was ELIZA, developed by Joseph Weizenbaum at MIT in 1966. ELIZA simulated a Rogerian psychotherapist by pattern‑matching user inputs and returning scripted responses, often rephrasing statements as questions. Although simple, ELIZA convinced some users that it understood them, illustrating the concept of the Turing test—the ability of a machine to exhibit intelligent behaviour indistinguishable from a human.

#### 1.1.2 PARRY and ALICE
In 1972, psychiatrist Kenneth Colby created PARRY, a chatbot that simulated a person with paranoid schizophrenia. PARRY used more sophisticated rule‑based reasoning than ELIZA and was even tested against human patients in psychiatric interviews. In 1995, Richard Wallace released ALICE (Artificial Linguistic Internet Computer Entity), which used a pattern‑matching markup language called AIML. ALICE won the Loebner Prize multiple times and became a widely studied early chatbot.

### 1.2 Transition to machine learning (2000s–2010s)

#### 1.2.1 Statistical NLP and retrieval‑based models
The early 2000s saw the rise of statistical natural language processing. Researchers moved from hand‑crafted rules to data‑driven approaches, using corpora to train classifiers for intent recognition. Retrieval‑based models appeared, selecti