Understanding the Passage and the Blank

The passage discusses the nature of psychology, emphasizing that it is primarily a laboratory science rather than just a text-book subject. It highlights the importance of verifying text-book statements through personal experience and observing others.

The specific sentence we need to focus on is: "While the text should be thoroughly mastered, its statements should always be verified________ reference to one's own experience, and observation of others."

The blank requires a preposition that connects the action "verified" with the means or method "reference to one's own experience".

Analyzing the Options for Verification

Let's examine the provided options and how they fit grammatically and contextually with the phrase "verified ________ reference to".

• to: "verified to reference" - This usage is generally incorrect. "To" often indicates direction, purpose, or a recipient. It doesn't fit the idea of using something as a method of verification.
• at: "verified at reference" - "At" usually indicates a location or specific time. It doesn't make sense in the context of using reference as a means of verification.
• by: "verified by reference" - This construction is grammatically correct and commonly used. "By" is used to indicate the means or agent performing an action. In this case, the statements are verified by means of reference to experience and observation.
• for: "verified for reference" - "For" can indicate purpose or benefit. While one might keep something "for reference", verifying something "for reference" doesn't convey the meaning that reference is the method of verification.

Choosing the Correct Preposition

The phrase "verified by reference to" is a standard idiom used to indicate that something is confirmed or checked using something else as a point of comparison or evidence. In the context of the passage, the text-book statements are verified using the reference points of personal experience and observation.

Therefore, the preposition that correctly indicates the means or method of verification in this context is "by".

Step-by-Step Selection

1. Identify the action being performed: "verified".

2. Identify what is used for verification: "reference to one's own experience, and observation of others".

3. Determine the preposition that correctly links the action to the means used.

4. Evaluate each option:

• "verified to reference" - Incorrect linkage.
• "verified at reference" - Incorrect linkage.
• "verified by reference" - Correctly links the action (verified) to the means (reference).
• "verified for reference" - Incorrect linkage in this specific context.

5. Conclude that "by" is the appropriate preposition.

Final Answer Placement

Inserting "by" into the blank yields: "While the text should be thoroughly mastered, its statements should always be verified by reference to one's own experience, and observation of others." This sentence makes grammatical sense and fits the overall meaning of the passage.

Revision Table: Prepositions for Verification

Additional Information: The Importance of Experiential Learning in Psychology

The passage highlights a key principle in studying psychology: active engagement and self-observation are crucial, not just passive reading. Psychology is about understanding the mind and behavior, which is best done by observing it in action, both in oneself and others. This makes it different from fields that might be learned primarily from books or lectures alone.

The concept of "verifying by reference to one's own experience" encourages students to connect theoretical concepts learned from textbooks to real-life situations. For instance, if a textbook discusses theories of memory, a student might try to observe their own memory processes or those of others to see how the theories apply. This hands-on approach makes learning more meaningful and solidifies understanding.

Similarly, prospective teachers are encouraged to observe children in a school setting to correlate textbook lessons with actual child behavior. This practical observation is essential for applying psychological principles effectively in an educational environment.