Is the first one the right answer?? I appreciate the help! The following figure

Question

Is the first one the right answer?? I appreciate the help!

The following figure reflects the results of a study by Roediger and Karpicke (2006). The authors investigated whether the test-enhanced learning effect (the demonstration that repeated testing improves memory for material) was due merely to repeated exposure to the material. They randomly assigned participants to one of two study conditions (study-study or study-test) and to one of three retention interval conditions (final test at a delay of five minutes, two days, or one week). The dependent variable was the proportion of idea units recalled from an encyclopedia passage. According to the figure Testing and Memory, based on the cells of this study, which effects appear to be present? a main effect of the study condition, a main effect of the retention interval, and an interaction between the study condition and retention interval a main effect of the study condition and an interaction between the study condition and retention interval an interaction between the study condition and retention interval a main effect of the study condition and a main effect of the retention interval

Explanation / Answer

SInce grey bars are not always greater than white bars, a main effect of study condition is present when it is combined with an interaction effect..

ALso, the size of bars decrease with increasing retention time. Hence, an effect of retenton interval is present.

Also,an interaction effect is present as the grey bars are larger than white bars in shortest time frame, while it is inverse otherwise.

Hence, the correct answer is B.

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