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: 3 Topic Development: 3

2.预估分数 Estimated Score: 23

3.表达 从表达方面来看，这位同学的回答基本上是清晰流畅的，但在某些地方存在一些不必要的停顿。建议同学在练习口语时注意保持连贯性和一致的语速，尽量减少不必要的停顿。此外，在发音方面也需要注意，避免出现拼写错误。

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 a few inaccuracies in the details, such as mentioning a Thai restaurant instead of an Italian one. To improve topic development, make sure to accurately recount the details from the lecture and reading passage. Additionally, try to make clearer connections between the example and the concept of information cascade, emphasizing how people's decisions were influenced by others' choices in this situation.

5.语言使用

Original: Information cascade is a tendency that people will imitate others' choice, and Professor uses an example to explain it. When he made choice between the Thai restaurant and French restaurant, he noticed that the Thai restaurant was of high ranking but was empty in it, and the French restaurant was of low ranking but was crowded in it. And he began to think that the guidebook may be wrong, the ranking may be not true, the French restaurant had a lot of people, so it must be very good. So he entered the French restaurant and found it actually very bad. But more people continued to come in the French restaurant because they all imitated others, and they thought that there are a lot of people eating in it, so it must be very good. And the Thai restaurant is always very empty because there are not a lot of people.

Corrected: The information cascade is a phenomenon where people tend to imitate others' choices. The professor illustrates this concept with an example. When deciding between an Italian restaurant and a French one, he noticed that the Italian restaurant had a high rating but was empty, while the French one had a low rating but was crowded. He began to doubt the guidebook's accuracy and assumed that the French restaurant must be better due to its popularity. After dining at the French restaurant, he found the food to be mediocre. However, more people continued to arrive at the French restaurant because they also followed others' choices, believing that its popularity indicated quality. Meanwhile, the Italian restaurant remained empty due to its lack of patrons. (在这个修改后的版本中，我们纠正了原文中的一些错误，例如将“泰国餐厅”改为“意大利餐厅”，并使用了更自然的语言表达。同时，我们还对句子结构和语法进行了调整，使其更加流畅。)

Revised Answer (140 words): The information cascade is a phenomenon where people tend to imitate others' choices, often leading to a chain reaction. The professor illustrates this concept with a personal example. When deciding between an Italian restaurant and a French one, he observed that the Italian restaurant had a high rating but was empty, while the French one had a low rating but was crowded. Doubting the guidebook's accuracy, he assumed that the French restaurant must be better due to its popularity. After dining there, he found the food to be mediocre. However, more people continued to arrive at the French restaurant because they also followed others' choices, believing that its popularity indicated quality. Meanwhile, the Italian restaurant remained empty due to its lack of patrons. This example clearly demonstrates how an information cascade can influence people's decisions based on the actions of others.

6.思维导图

Information Cascade
├─ Phenomenon
│   └─ Imitating others' choices
├─ Professor's Example
│   ├─ Italian vs French restaurant
│   ├─ Guidebook ratings
│   ├─ Popularity influencing decision
│   └─ Mediocre food at French restaurant
└─ Conclusion
    └─ Information cascade influencing decisions based on others' actions

7.关键词

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

2.预估分数 Estimated Score: 23

3.表达 在表达方面，发言者的语言流利度和语速基本一致，但偶尔出现停顿。为了提高发言质量，建议发言者注意以下几点：1) 在句子之间适当地使用停顿，以便让听众更好地理解内容；2) 注意发音的准确性，以避免拼写错误。通过改进这些方面，发言者的表达能力将得到提高。

4.话题发展 The speaker's response is coherent and well-organized, with clear connections between ideas and sufficient support or examples. However, there is room for improvement in topic development. To enhance the response, the speaker could provide more details about the professor's experience, such as mentioning the guidebook ratings and how the professor initially trusted the guidebook but changed his mind based on the crowd at the French restaurant. Additionally, the speaker could emphasize how this example illustrates the concept of an information cascade by explaining that people continued to choose the French restaurant based on its popularity, even though it had a lower rating in the guidebook. By incorporating these suggestions, the speaker's topic development will be stronger and more effective.

5.语言使用

Original Answer: In the lecture, the professor introduces a concept information cascade, which means when the decision of a few affects the behavior of a large group, this is said to be due to an information cascade. In the lecture, the professor introduces the concept of an information cascade, which occurs when the decisions of a few individuals influence the behavior of a larger group. (在这句话中，我们添加了“的概念”和“发生在”以使句子更自然。同时，我们也简化了句子结构，使其更易于理解。)

The professor uses himself as an example to explain the concept. The professor provides a personal example to illustrate the concept. (这里我们用“提供一个个人示例”来替换“用自己作为例子”，使表达更准确。)

Last week, he visited a place and he needed to eat dinner. Last week, while visiting a new city, he needed to find a place for dinner. (我们改进了句子结构，使其更自然，并提供了更多背景信息。)

He found two restaurants, Italian restaurant and French restaurant. He discovered two nearby restaurants, an Italian one and a French one. (我们改进了句子结构，并添加了“附近的”以提供更多信息。)

Italian restaurant was so empty, there wasn't many people eat there. The Italian restaurant was quite empty, with not many people eating there. (我们调整了句子结构，使其更自然。)

French restaurant was crowded, so he chose French restaurant because he thought it's better than Italian food since many people eat there. The French restaurant was crowded, so he chose it, thinking it must be better than the Italian one since many people were dining there. (我们改进了句子结构，使其更自然，并提供了更多细节。)

But actually, French restaurant's people wasn't good, and more people come there constantly. However, the food at the French restaurant turned out to be mediocre, and yet more people kept arriving. (我们调整了句子结构，使其更自然，并提供了更多细节。)

Maybe they also have similar thoughts with professor. Perhaps they also had similar thoughts as the professor did. (我们改进了句子结构，使其更自然。)

Revised Answer (140 words):

In the lecture, the professor introduces the concept of an information cascade, which occurs when the decisions of a few individuals influence the behavior of a larger group. The professor provides a personal example to illustrate the concept. Last week, while visiting a new city, he needed to find a place for dinner. He discovered two nearby restaurants, an Italian one and a French one. The Italian restaurant was quite empty, with not many people eating there. The French restaurant was crowded, so he chose it, thinking it must be better than the Italian one since many people were dining there. However, the food at the French restaurant turned out to be mediocre, and yet more people kept arriving. Perhaps they also had similar thoughts as the professor did.

6.思维导图

- Information Cascade
  - Definition
    - Decisions of a few influence behavior of larger group
  - Professor's Example
    - Visiting new city
      - Needed dinner
        - Italian restaurant (empty)
        - French restaurant (crowded)
          - Chose French (assumed better due to crowd)
          - Food mediocre
          - More people kept arriving (similar thoughts as professor)

7.关键词

1.子项得分

Delivery: 2 Language Use: 2.5 Topic Development: 3

2.预估分数

总分: 19

3.表达

在这个回答中，发言者的表达有些不清晰，语速不稳定，有时会出现不必要的停顿。建议发言者在练习口语时注意保持语速的稳定性，尽量减少不必要的停顿。此外，发言者在发音方面也有一些错误，需要加强发音练习。

4.话题发展

从话题发展的角度来看，发言者的回答是连贯和组织良好的，能够清楚地阐述观点，并提供了足够的支持和例子。但是，在表达过程中有些重复和冗余的部分，可以尝试更简洁地表达观点。总体来说，话题发展方面做得还不错，只需在表达上进行一些改进。

5.语言使用

Original: Well, an information cascade is a concept mentioned in the reading passage, which means many people follow the decisions of a few even when they believe a better option is available. In the lecture, the professor used his own experience as an example. Last week, he went to a brand new city for him and wanted to get some dinner. He had a map and the review of it is opposite to his own feelings. He firstly he go to the Italian restaurant, but it's empty. And then he go to French restaurant across the street and there are more people, there were more people here. So he started to question the review of the map and the dinner, however, the dinner is not that good, but still so many people rushed in this restaurant and get some meal. But when they went back to the Italian restaurant, there were still not many people.

Corrected: An information cascade, as mentioned in the reading passage, occurs when many people follow the decisions of a few even when they believe a better option is available. In the lecture, the professor shared his own experience as an example. Last week, he visited a new city and wanted to have dinner. He had a guidebook with restaurant reviews that contradicted his observations. Initially, he went to an Italian restaurant which was empty. Then he went to a French restaurant across the street that was crowded. He began questioning the guidebook's review and decided to dine at the French restaurant; however, the food was mediocre despite its popularity. When he passed by the Italian restaurant later on, it still had few customers. (在这个修改后的版本中，我们修正了一些语法错误，例如使用了正确的时态和词汇，并使句子更加简洁。)

Revised (140 words): An information cascade, as mentioned in the reading passage, occurs when many people follow the decisions of a few even when they believe a better option is available. In the lecture, the professor shared his own experience as an example. He visited a new city and wanted to have dinner. With a guidebook containing restaurant reviews, he initially went to an Italian restaurant which was empty. Then, he noticed a crowded French restaurant across the street. Questioning the guidebook's review, he decided to dine at the French restaurant; however, the food was mediocre despite its popularity. When he passed by the Italian restaurant later on, it still had few customers. This example illustrates how people tend to follow others' choices, creating an information cascade, even if they have access to different information suggesting a better option.

6.思维导图

• Information Cascade

  • Definition
  • Reading passage

• Professor's Example

  • New city
  • Guidebook with restaurant reviews
  • Italian restaurant (empty)
  • French restaurant (crowded)
  • Questioning guidebook's review
  • Mediocre food at French restaurant
  • Italian restaurant still empty later on

• Illustration of Information Cascade

  • Following others' choices
  • Ignoring available information

7.关键词