问题


There is a single choice question about high school statistics. Answer the question by replying A, B, C or D.
Question: In a clinic, 50 patients with sleep disorders are randomly assigned to one of two different groups. Patients in one group are given medication before bedtime. Patients in the other group are given blindfolds and played soft music at bedtime. Each patient is attached to a machine that records breathing patterns. From the patterns, it is possible to determine if the patient is awake or asleep. The data will be used to decide which method is more effective in helping patients with sleep disorders. Which of the following statements is correct in the context of this experiment?
A. It is not possible for this experiment to be single-blind or double-blind, because human subjects are involved.
B. This is only a single-blind experiment because the experimenters did not include a control group that received neither medication nor a blindfold and soft music.
C. This is only a single-blind experiment because patients will know which treatment they are receiving, although the examining doctor might not.
D. This is a double-blind experiment because the experimenters could prevent both groups of patients from knowing what sort of treatment the other group is receiving.
Answer:

答案

模型 模型答案 正确答案
金声玉亮2.0

C. This is only a single-blind experiment because patients will know which treatment they are receiving, although the examining doctor might not.		 C
deepseekr1

The experiment involves two groups: one receiving medication and the other using blindfolds and soft music. The key to determining blinding lies in whether participants or assessors know the treatment assignments.

- **Option A** incorrectly claims blinding is impossible with human subjects, which is false (e.g., placebos can blind participants).
- **Option B** conflates the absence of a control group with blinding, which are separate concepts.
- **Option C** correctly identifies that patients know their treatment (medication vs. blindfold/music), but if the doctors analyzing the machine data (objective breathing patterns) are unaware of group assignments, the experiment is single-blind.
- **Option D** misdefines double-blind as preventing knowledge of other groups’ treatments, rather than blinding both participants and assessors.

Since patients are aware of their own treatment, but assessors might not be, **C** is correct.

**Answer: C**		 C
gpto1 C C
GPT-4o C. This is only a single-blind experiment because patients will know which treatment they are receiving, although the examining doctor might not. C
llama3.1-70B-Instruct

C		 C
llama3.1-405B-Instruct

C. This is only a single-blind experiment because patients will know which treatment they are receiving, although the examining doctor might not.		 C
DeepSeek-Coder-V2 C. This is only a single-blind experiment because patients will know which treatment they are receiving, although the examining doctor might not. C
Qwen2-72B-Instruct C. This is only a single-blind experiment because patients will know which treatment they are receiving, although the examining doctor might not. C
baichuan4 C C
doubao D

In this experiment, the patients don't know which group they are in (whether they are getting the medication or the blindfold and music), and the doctors analyzing the breathing patterns also don't know which treatment each patient received. This makes it a double-blind experiment. Option A is incorrect as human subjects can be involved in single-blind or double-blind experiments. Option B is incorrect as the presence or absence of a specific control group does not determine if it's single-blind or double-blind. Option C is incorrect as it's not only a single-blind if only the patients know.		 C
minimax C. This is only a single-blind experiment because patients will know which treatment they are receiving, although the examining doctor might not. C
kimi C. This is only a single-blind experiment because patients will know which treatment they are receiving, although the examining doctor might not.

Explanation: In a single-blind experiment, only the participants are unaware of which treatment they are receiving. In this case, the patients would know if they are given medication or blindfolds with soft music, but the doctor examining the results might not know which treatment the patient received. A double-blind experiment would require that neither the participants nor the researchers assessing the outcomes know which treatment is being given. Since the question does not specify that the examining doctor is blinded to the treatment, we cannot assume it is double-blind.		 C
wenxinyiyan C

Explanation:
In a single-blind experiment, either the subjects or the researchers who interact with the subjects and collect data are unaware of which treatment a subject received. In a double-blind experiment, both the subjects and the researchers who interact with the subjects and collect data are unaware of which treatment a subject received.

A. It is possible for experiments involving human subjects to be single-blind or double-blind. Blind experiments are commonly used in medical and psychological research to reduce bias. Therefore, this statement is incorrect.

B. The experiment described does include two treatment groups (medication and blindfold with soft music). However, the absence of a control group that receives no treatment does not determine whether the experiment is single-blind or double-blind. The blind aspect refers to who knows which treatment is being administered, not the presence or absence of a control group. Therefore, this statement is incorrect.

C. In this experiment, patients will likely know which treatment they are receiving (medication or blindfold with soft music). The examining doctor might not know which treatment each patient received, but since at least one party (the patients) is aware of the treatment, it can only be a single-blind experiment. Therefore, this statement is correct.

D. For an experiment to be double-blind, both the subjects and the researchers who interact with them must be unaware of which treatment is being administered. In this case, the patients are likely aware of their treatment, so it cannot be a double-blind experiment. Therefore, this statement is incorrect.		 C
zhipu C

Explanation: In this experiment, the patients know which treatment they are receiving (medication or blindfold with soft music), which means the patients are not blinded to the treatment. However, the examining doctor or researcher could be blinded to which treatment the patients are receiving if they do not know which group each patient belongs to. This makes it a single-blind experiment, as the patients are aware of their treatment but the researchers are not.

Option A is incorrect because it is possible to have single-blind or double-blind experiments with human subjects.
Option B is incorrect because the presence or absence of a control group does not determine whether the experiment is single-blind or double-blind.
Option D is incorrect because a double-blind experiment requires that both the patients and the researchers are unaware of the treatment assignments, which is not the case here as the patients know their treatment.		 C
gpto1 C C
deepseekv3 C. This is only a single-blind experiment because patients will know which treatment they are receiving, although the examining doctor might not.

Explanation: In this experiment, the patients will know whether they are receiving medication or a blindfold with soft music, so they are not blinded to the treatment. However, the examining doctor or the person analyzing the breathing patterns might not know which treatment each patient received, which would make the experiment single-blind. Double-blind experiments require that both the participants and the experimenters are unaware of who is receiving which treatment, which is not the case here. Therefore, the correct answer is C.		 C