Meaning: 'Attempts' refers to efforts or endeavors made to achieve something, in this case, investigating the phenomenon scientifically.

Wrong options:

• tries: 'Tries' is a less formal term and does not fit well in the context of scientific investigation, which requires a more formal tone.
• tests: 'Tests' implies a more structured examination rather than the broader effort implied by 'attempts,' making it less suitable here.
• aims: 'Aims' suggests a goal rather than an action taken, which does not align with the context of conducting investigations.

Correct answer: genuine

Explanation: The word 'genuine' fits contextually as it describes the sixth sense as being real and authentic, which aligns with the positive sentiment of the evidence presented in the study.

Meaning: 'Genuine' means authentic or real, indicating that the sixth sense is not just a belief but has credible evidence supporting it.

Wrong options:

• accepted: 'Accepted' implies a consensus but does not convey the authenticity that 'genuine' does, making it less impactful in this context.
• received: 'Received' suggests something that has been given or obtained, which does not accurately describe the nature of the sixth sense being discussed.
• sure: 'Sure' indicates certainty but lacks the depth of meaning that 'genuine' provides regarding the nature of the sixth sense.

Correct answer: red

Explanation: The word 'red' fits grammatically as an adjective describing the state of the children's eyes, and contextually, it suggests a specific condition that prevents them from seeing.

Meaning: 'Red' refers to the color, indicating that the children's eyes were covered or altered in a way that made them unable to see.

Wrong options:

• shadded: 'Shadded' is not a standard English word and does not convey a clear meaning, making it grammatically incorrect.
• wraped: 'Wraped' is a misspelling of 'wrapped,' which could imply covering but does not specifically describe the condition of the eyes as effectively as 'red.'
• masked: 'Masked' implies covering but does not provide the specific visual imagery that 'red' does in this context.

Correct answer: tell

Explanation: The word 'tell' fits grammatically as a verb that indicates the ability to communicate or express knowledge about being stared at, aligning well with the context of the children's experiences.

Meaning: 'Tell' means to communicate or indicate something, in this case, the children's ability to recognize when they were being watched.

Wrong options:

• find: 'Find' implies discovering something, which does not accurately capture the act of recognizing or perceiving being stared at.
• notice: 'Notice' suggests awareness but lacks the definitive communication aspect that 'tell' conveys in this context.
• reveal: 'Reveal' implies disclosing something that was hidden, which does not fit the context of the children's immediate perception of being watched.

Correct answer: total

Explanation: The word 'total' fits grammatically as a noun that summarizes the overall number of trials conducted, aligning with the context of quantifying the experiments.

Meaning: 'Total' refers to the complete amount or sum of something, in this case, the total number of trials conducted.

Wrong options:

• sum: 'Sum' is typically used in mathematical contexts and does not convey the broader sense of a collection of trials as effectively as 'total.'
• collection: 'Collection' implies a gathering but does not specifically indicate the numerical aspect that 'total' does.
• mass: 'Mass' suggests a large quantity but lacks the precision and clarity that 'total' provides in this context.

Correct answer: correctly

Explanation: The word 'correctly' fits grammatically as an adverb modifying the verb 'sensed,' indicating the manner in which the children perceived being watched, aligning with the context of accuracy in their responses.

Meaning: 'Correctly' means in a right or accurate manner, indicating that the children were able to sense when they were being watched with a high degree of accuracy.

Wrong options:

• exactly: 'Exactly' implies precision but does not convey the broader sense of correctness that 'correctly' does in this context.
• throughlt: 'Throughlt' is a misspelling of 'thoroughly,' which suggests completeness but does not fit the context of sensing accurately.
• perfectly: 'Perfectly' suggests flawlessness, which is too strong a term for the context of sensing being watched, as it implies an unrealistic level of accuracy.