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Difficulty: MediumClause Boundaries and Linking

In cognitive psychology, change blindness refers to the tendency of observers to fail to notice significant changes in a visual scene. Researchers study this phenomenon by inserting a brief disruption between two versions of an ______ many participants fail to detect the alteration because the brain does not store every visual detail.

Which choice completes the text so that it conforms to the conventions of Standard English?

  1. image;Answer
  2. B
    image,
  3. C
    image
  4. D
    image, but

Answer

image;
The semicolon correctly links the two independent clauses without a coordinating conjunction, conforming to the conventions of Standard English.

Step-by-Step Solution

1
Identify the clause boundaries in the sentence.
The sentence contains two independent clauses: 'Researchers study this phenomenon by inserting a brief disruption between two versions of an image' and 'many participants fail to detect the alteration because the brain does not store every visual detail.'
Both clauses contain a subject and a verb and can express a complete thought independently.
2
Determine the appropriate punctuation or conjunction to link these clauses.
Two independent clauses must be joined by a period, a semicolon, a colon (if the second explains the first), or a comma followed by a coordinating conjunction (FANBOYS).
Joining them with only a comma creates a comma splice, and joining them with no punctuation creates a run-on sentence.
3
Evaluate the choices to find the grammatically and logically correct option.
The option containing a semicolon correctly links the two clauses. The option with a comma creates an ungrammatical comma splice. The option with no punctuation creates an ungrammatical run-on. The option with the comma and coordinator 'but' is grammatically possible but logically incorrect since there is no contrast between the clauses.
The semicolon is the only choice that maintains grammatical correctness and logical flow.

Key Concept

Semicolons are used to connect two closely related independent clauses that are not joined by a coordinating conjunction.
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Topics

Clause Boundaries and Linking

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