Events & Promotions
|
|
GMAT Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Apr 2808:00 AM PDT
-11:00 AM PDT
Whether you are just beginning your MBA journey or fine-tuning your path to a 700+ score, GMAT Day is designed to give you a competitive edge.
25 Sep 2025, 09:23
Kudos
Bookmarks
Researchers conducted a controlled study to examine how different follow-up activities affected retention of the same academic material. Five groups of equal size participated. All participants were drawn from the same academic program, and the groups were balanced with respect to prior course performance, gender, and age distribution. Each group first read the same chapter of a textbook for one hour.
After this initial reading, four groups were assigned distinct one-hour follow-up activities:
• Flashcard Review: students studied a prepared set of flashcards that summarized key concepts from the chapter.
• Silent Re-reading: students read the chapter again quietly on their own.
• Video Recap: students watched a one-hour instructional video that explained and summarized the chapter.
• Group Discussion: students discussed the chapter in their assigned groups, using a prepared set of guiding questions.
A fifth group served as the control. These students read the chapter once for one hour and then took the recall quizzes without any additional activity.
All groups completed the recall quiz three times: immediately after their assigned study procedure, one day later, and one week later. None of the groups had any further contact with the material between the first test and the final test. The quiz scores reported for each group represent the average percentage of correct answers achieved by that group.
After this initial reading, four groups were assigned distinct one-hour follow-up activities:
• Flashcard Review: students studied a prepared set of flashcards that summarized key concepts from the chapter.
• Silent Re-reading: students read the chapter again quietly on their own.
• Video Recap: students watched a one-hour instructional video that explained and summarized the chapter.
• Group Discussion: students discussed the chapter in their assigned groups, using a prepared set of guiding questions.
A fifth group served as the control. These students read the chapter once for one hour and then took the recall quizzes without any additional activity.
All groups completed the recall quiz three times: immediately after their assigned study procedure, one day later, and one week later. None of the groups had any further contact with the material between the first test and the final test. The quiz scores reported for each group represent the average percentage of correct answers achieved by that group.
For each of the following statements about the recall scores in Tab 3, select Yes if the statement accurately reflects the information provided. Otherwise, select No.
| Yes | No | |
| All four experimental groups scored at least four times as much as the control group on every test. | ||
| The average decline across the four experimental groups from the immediate test to the one-day test was smaller than the average decline from the one-day test to the one-week test. | ||
| At least one group outperformed another group at the immediate test but scored lower than that same group at the one-week test. |
ShowHide Answer
Official Answer
All four experimental groups scored at least four times as much as the control group on every test.: No
The average decline across the four experimental groups from the immediate test to the one-day test was smaller than the average decline from the one-day test to the one-week test.: Yes
At least one group outperformed another group at the immediate test but scored lower than that same group at the one-week test.: Yes
25 Sep 2025, 09:23
Kudos
Bookmarks
Official Solution:
Statement 1: All four experimental groups scored at least four times as much as the control group on every test.
Control scores: 20 (immediate), 12 (1 day), 5 (1 week)
Four times those values: 80, 48, 20.
• Immediate: Flashcard (82), Discussion (74), Silent (68), Video (64). Only Flashcard ≥ 80. Others < 80.
• 1 day: Experimental groups (71, 64, 50, 43). Three ≥ 48, but Video is 43 < 48.
• 1 week: Experimental groups (55, 59, 28, 22). All ≥ 20.
So it is not true that all four groups scored ≥ four times control on every test.
Answer: No
Statement 2: The average decline across the four experimental groups from the immediate test to the one-day test was smaller than the average decline from the one-day test to the one-week test.
We need to compute average declines.
• Immediate → 1 day:
Flashcard: 82 – 71 = 11
Silent: 68 – 50 = 18
Video: 64 – 43 = 21
Discussion: 74 – 64 = 10
Average decline = (11 + 18 + 21 + 10) / 4 = 60 / 4 = 15
• 1 day → 1 week:
Flashcard: 71 – 55 = 16
Silent: 50 – 28 = 22
Video: 43 – 22 = 21
Discussion: 64 – 59 = 5
Average decline = (16 + 22 + 21 + 5) / 4 = 64 / 4 = 16
Compare: 15 (first drop) vs 16 (second drop).
Yes, the average decline from Immediate → 1 day is smaller than from 1 day → 1 week.
Answer: Yes
Statement 3: At least one group outperformed another group at the immediate test but scored lower than that same group at the one-week test.
This means:
• At the Immediate stage, Group A > Group B.
• At the One-week stage, Group A < Group B.
• In other words, the two groups switched order between Immediate and One-week.
Check Tab 3:
• Flashcard vs Group Discussion:
Immediate → Flashcard (82) > Discussion (74).
One week → Flashcard (55) < Discussion (59).
Switch occurs.
Thus, the statement is true.
Answer: Yes
Correct answer:
All four experimental groups scored at least four times as much as the control group on every test. "No"
The average decline across the four experimental groups from the immediate test to the one-day test was smaller than the average decline from the one-day test to the one-week test. "Yes"
At least one group outperformed another group at the immediate test but scored lower than that same group at the one-week test. "Yes"
Bunuel
Statement 1: All four experimental groups scored at least four times as much as the control group on every test.
Control scores: 20 (immediate), 12 (1 day), 5 (1 week)
Four times those values: 80, 48, 20.
• Immediate: Flashcard (82), Discussion (74), Silent (68), Video (64). Only Flashcard ≥ 80. Others < 80.
• 1 day: Experimental groups (71, 64, 50, 43). Three ≥ 48, but Video is 43 < 48.
• 1 week: Experimental groups (55, 59, 28, 22). All ≥ 20.
So it is not true that all four groups scored ≥ four times control on every test.
Answer: No
Statement 2: The average decline across the four experimental groups from the immediate test to the one-day test was smaller than the average decline from the one-day test to the one-week test.
We need to compute average declines.
• Immediate → 1 day:
Flashcard: 82 – 71 = 11
Silent: 68 – 50 = 18
Video: 64 – 43 = 21
Discussion: 74 – 64 = 10
Average decline = (11 + 18 + 21 + 10) / 4 = 60 / 4 = 15
• 1 day → 1 week:
Flashcard: 71 – 55 = 16
Silent: 50 – 28 = 22
Video: 43 – 22 = 21
Discussion: 64 – 59 = 5
Average decline = (16 + 22 + 21 + 5) / 4 = 64 / 4 = 16
Compare: 15 (first drop) vs 16 (second drop).
Yes, the average decline from Immediate → 1 day is smaller than from 1 day → 1 week.
Answer: Yes
Statement 3: At least one group outperformed another group at the immediate test but scored lower than that same group at the one-week test.
This means:
• At the Immediate stage, Group A > Group B.
• At the One-week stage, Group A < Group B.
• In other words, the two groups switched order between Immediate and One-week.
Check Tab 3:
• Flashcard vs Group Discussion:
Immediate → Flashcard (82) > Discussion (74).
One week → Flashcard (55) < Discussion (59).
Switch occurs.
Thus, the statement is true.
Answer: Yes
Correct answer:
All four experimental groups scored at least four times as much as the control group on every test. "No"
The average decline across the four experimental groups from the immediate test to the one-day test was smaller than the average decline from the one-day test to the one-week test. "Yes"
At least one group outperformed another group at the immediate test but scored lower than that same group at the one-week test. "Yes"
