An Instructor in Introductory Psychology Wanted to Know If the Textbook

question 49

Multiple Choice

An instructor in Introductory Psychology wanted to know if the textbook she was using was as effective as other textbooks on the market. In order to test this, she decided that she would teach the course in the fall with the text she typically uses, and in the spring she would use a new text. After doing this, she compared the students' final grades and students' responses to an 'end of semester' evaluation question. The question was "How effective was the text for this course?" She discovered that students' grades increased from a mean of 78 in the fall to 83 in the spring. She also discovered that the students' opinion of the course's text increased from a mean of 4.5 (on a 7-point scale, the higher the better) in the fall to 4.9 in the spring. After running the appropriate statistical test(s) , she discovered that both of these differences were statistically significant.
We have the most persuasive evidence of some phenomenon when

• A) we have a very large sample.
• B) we have very accurate measurements.
• C) we have converging lines of evidence from a variety of studies.
• D) we have a single tightly controlled experiment.

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Definitions:

Norms

Standards or expectations that are accepted by a group as guiding the behavior of its members.

Stanford-Binet

A cognitive ability and intelligence test that measures human intelligence across five factors.

MMPI-2

The Minnesota Multiphasic Personality Inventory-2, a widely used psychological assessment tool for diagnosing mental health disorders.

Standardized Tests

Tests that are administered and scored in a consistent, or "standard", manner which are used to measure proficiency in various subjects.