In a two-by-two factorial design, you find that the high level of caffeine paired with high level of sugar produces the most memory improvement. Your results show
A) no interaction
B) a ceiling effect interaction
C) an antagonistic interaction
D) a synergistic interaction

Question

Quizplus · Accepted Answer

The fact that high levels of caffeine paired with high levels of sugar produce the most memory improvement indicates a synergistic interaction. This means that the combined effect of caffeine and sugar is greater than the sum of their individual effects.

In a Two-By-Two Factorial Design, You Find That the High