TOEFL Speaking Task 3 Sample: Explain how the example from the professor's lecture illustrates the concept of an information cascade.

1.子项得分 Delivery: 3 Language Use: 2.5 Topic Development: 3

2.预估分数 Estimated Score: 22

3.表达 从表达方面来看，发言者的语言流利度和语速较为稳定，但偶尔有停顿。建议发言者在练习口语时注意提高发音准确性，避免因发音不准确而导致的拼写错误。同时，注意在适当的地方停顿，以增强语言表达的连贯性。

4.话题发展 The response does a decent job of explaining the concept of information cascade using the professor's example. However, there are some inaccuracies in the retelling of the example, such as stating that the French restaurant was empty but tasty, and the Italian restaurant was not tasty but crowded. The speaker should focus on providing a more accurate summary of the example and clearly connecting it to the concept of information cascade. Additionally, it would be helpful to emphasize that the professor's decision to choose the French restaurant based on its crowd is an example of an information cascade, as he ignored the guidebook's recommendation and followed what others were doing.

6.语言使用

Original Answer: The reading talks about the term of information cascade, which refers to people making decisions by observing what other people do even though they know it is not true. For example, when he came to an unfamiliar city, he took the guidebook. It recommended two local restaurants nearby. One is a French restaurant with a non-high rate. Another one is the Italian restaurant with a high rate. The French restaurant is across the street, so he came to the French restaurant. He found they are empty but tasty, while the other one is not tasty but with a lot of people. He found that the guidebook is not true.

Corrected Answer: The reading discusses the concept of information cascade, which refers to people making decisions based on observing others' actions, even when it contradicts their own knowledge. In the professor's example, when he arrived in an unfamiliar city, he consulted a guidebook that recommended two nearby local restaurants. One was a French restaurant with a low rating, and the other was an Italian restaurant with a high rating. The French restaurant was across the street, so he decided to try it out. He discovered that it was crowded but served mediocre food, while the Italian restaurant was less crowded but presumably had better food. This experience demonstrated that the information cascade influenced people's decisions, including his own. (在修改后的答案中，我们使用了更自然的语言表达，并对原文中的一些错误进行了纠正。例如，将“term of information cascade”改为“concept of information cascade”，将“non-high rate”改为“low rating”，并对叙述进行了澄清。这些修改使得答案更加准确和流畅。)

Revised Answer (140 words): The reading discusses the concept of information cascade, a phenomenon where people make decisions based on observing others' actions, even when it contradicts their own knowledge. In the professor's example, he arrived in an unfamiliar city and consulted a guidebook that recommended two nearby local restaurants: a highly-rated Italian restaurant and a lower-rated French restaurant. Despite the guidebook's ratings, he chose the French restaurant because it was crowded, assuming it was better than the Italian one. However, he found that the food was mediocre, while the Italian restaurant remained less crowded but presumably had better food. This experience demonstrated that the information cascade influenced people's decisions, including his own, as they followed the crowd instead of relying on their knowledge or other sources of information.

7.思维导图

• Information Cascade
  • Definition
  • Professor's Example
    • Unfamiliar city
    • Guidebook recommendations
      • French restaurant (low rating)
      • Italian restaurant (high rating)
    • Decision based on crowd
    • Mediocre food at French restaurant
    • Influence on people's decisions

8.关键词

1.子项得分

• 交付（Delivery）：3

• 语言使用（Language Use）：3

• 话题发展（Topic Development）：3

2.预估分数

• 总分：23

3.表达 回答中的发音和语速基本清晰，但有些地方存在适当的停顿。为了提高口语表达能力，建议在练习时注意以下几点：1) 在句子之间适当地使用停顿，以便让听众更好地理解你的观点；2) 注意发音的准确性，尤其是一些容易发错音的单词；3) 多加练习，提高语言流利度和自信心。

4.话题发展 回答内容基本上与题目相关，并且能够清楚地解释信息级联的概念。但在组织结构和论述方面还有待提高。建议在练习时注意以下几点：1) 在回答问题时，先简要概括阅读材料和听力材料的主要观点，然后再详细解释；2) 在解释听力材料中的例子时，尽量使用连词和过渡词，使得论述更加连贯；3) 在给出例子时，注意提供足够的支持和细节，以便让听众更好地理解你的观点。

5.语言使用

Original Answer: An informational cascade is when the majority of people chooses to imitate the actions of a minority of people because they cannot choose when they are deciding between two options. An information cascade occurs when the majority of people choose to imitate the actions of a minority because they are uncertain when deciding between two options. (修改了句子结构，使其更自然；将"informational"改为"information"，使词汇更准确) The professor illustrates the concept by giving a personal example of a time when he went to a foreign town and needed dinner. The professor demonstrates the concept by sharing a personal experience of visiting an unfamiliar city and looking for dinner. (使用了更高级的词汇和更自然的表达方式) He saw two options, one is a French restaurant and one is an Italian restaurant. He found two options, a French restaurant and an Italian restaurant. (简化了句子结构，使其更自然) And the Italian restaurant was rated good on his skybook, however, he saw that the French restaurant was extremely busy, so he went to the French restaurant instead of the Italian restaurant. The Italian restaurant had a high rating in his guidebook; however, he noticed that the French restaurant was very crowded, so he chose it over the Italian one. (改进了句子结构，使用了更高级的词汇，使句子更自然) He also noticed that because everyone was eating at the French restaurant, even though the food was not that good, more people went and came in, while when he went back to the hint hotel, he noticed that the Italian restaurant was still very empty. He observed that despite the mediocre food at the French restaurant, more people kept coming in, likely influenced by its popularity. Meanwhile, when he returned to his hotel, he noticed that the Italian restaurant remained mostly empty. (改进了句子结构，使用了更高级的词汇，使句子更自然) This illustrates the concept of an informational cascade because everyone wanted to go to the Italian restaurant but ended up in the French restaurant. This example illustrates the concept of an information cascade as people opted for the French restaurant based on its apparent popularity rather than their initial preference for the Italian one. (改进了句子结构，使用了更高级的词汇，使句子更自然)

Revised Answer (140 words):

An information cascade occurs when the majority of people choose to imitate the actions of a minority because they are uncertain when deciding between two options. The professor demonstrates the concept by sharing a personal experience of visiting an unfamiliar city and looking for dinner. He found two options, a French restaurant and an Italian restaurant. The Italian restaurant had a high rating in his guidebook; however, he noticed that the French restaurant was very crowded, so he chose it over the Italian one. He observed that despite the mediocre food at the French restaurant, more people kept coming in, likely influenced by its popularity. Meanwhile, when he returned to his hotel, he noticed that the Italian restaurant remained mostly empty. This example illustrates the concept of an information cascade as people opted for the French restaurant based on its apparent popularity rather than their initial preference for the Italian one.

6.思维导图

• Information Cascade

  • Majority imitates minority
  • Uncertainty in decision-making

• Professor's Example

  • Unfamiliar city
  • French and Italian restaurants
  • Guidebook ratings vs. crowd size
  • Chose French restaurant due to popularity
  • Mediocre food, continued popularity
  • Italian restaurant remained empty

• Illustration of Information Cascade

  • People chose based on popularity, not preference

7.关键词

1.Sub Scores

• Delivery: 3

• Language Use: 3

• Topic Development: 3

2.Estimated Scores

• Total Score: 23

3.Delivery The speaker's delivery is generally clear and fluid, but there are some occasional pauses that could be improved. To enhance the delivery, the speaker should practice speaking at a consistent pace and reduce unnecessary pauses. Additionally, focusing on accurate pronunciation will help eliminate any spelling errors that may arise from mispronunciation.

4.Topic Development The speaker provides a coherent and well-organized response, with clear connections between ideas and sufficient support from the professor's example. However, to further improve topic development, the speaker could elaborate more on how the professor's decision-making process exemplifies the concept of an information cascade. Additionally, incorporating more specific details from the reading passage and lecture will strengthen the response and provide a more comprehensive understanding of the topic.

5.Language Use

Original: Well, the information cascade is a behavior that when people are making decisions, they tend to be affected by a few others' choices, even though they know that there are better options. Well, the information cascade occurs when people's decision-making is influenced by a few others' choices, even though they are aware of better options. (Rephrased for clarity and improved sentence structure)

Original: In the lecture, to illustrate these concepts, the professor cited a personal example. In the lecture, the professor used a personal example to illustrate these concepts. (Rephrased for clarity and improved sentence structure)

Original: When he first went to a new city, he got a guidebook containing all local restaurant information Upon visiting a new city, he obtained a guidebook with comprehensive local restaurant information (Improved vocabulary and sentence structure)

Original: and he saw a nearby Italian restaurant, but he found that it is empty with little people in it, and noticed a nearby Italian restaurant which was empty with few customers, (Corrected grammar and improved vocabulary)

Original: so that he instead chose a French restaurant, leading him to choose a French restaurant instead, (Improved sentence structure and flow)

Original: But he found that the French restaurant doesn't taste that good. However, he discovered that the French restaurant's food was not that good. (Corrected grammar and improved vocabulary)

Revised Answer (140 words):

Well, the information cascade occurs when people's decision-making is influenced by a few others' choices, even though they are aware of better options. In the lecture, the professor used a personal example to illustrate these concepts. Upon visiting a new city, he obtained a guidebook with comprehensive local restaurant information and noticed a nearby Italian restaurant which was empty with few customers, leading him to choose a French restaurant instead. The French restaurant was much more crowded, making him think that the guidebook might be wrong. However, he discovered that the French restaurant's food was not that good. Despite this, more people kept coming in, likely influenced by the crowded appearance of the restaurant. This behavior of the professor and other tourists demonstrates the information cascade in action.

6.Mind Map

- Information Cascade
  - Definition
  - Influence on decision-making

- Lecture Example
  - Professor's experience
    - New city
    - Guidebook with restaurant ratings
    - Italian restaurant (empty)
    - French restaurant (crowded)
  - Decision-making process
    - Choosing French restaurant based on crowd
    - Food quality not as expected
  - Other tourists' behavior
    - Following the crowd
    - Information cascade in action

7.Key Words