Chapter 23. Chapter 23 Graphic Content
Introduction
Graphic Content
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You must read each slide, and complete the question on the slide, before proceeding to the next one.
Instructions
Review the information provided in the graph to answer each question below.
After submitting your answer, you will be provided feedback to check if your response is correct.
(This activity contains 7 questions.)
Question 23.1
The graph shows that qualified taxi drivers have an increased posterior hippocampus size relative to nonqualified drivers and non-drivers.
Question 23.2
The asterisk indicates that the difference in size is statically significant. In other words, the statistic is reliable and not due to chance; however, it doesn't mean the finding is important or that it has any decision-making utility. The lack of an asterisk for the other bars indicates there is no statistically significant difference between the compared groups. We cannot say with certainty that there is a difference between them.
Question 23.3
The hypothesis is this: cab driving doesn’t make your hippocampus bigger. People differ innately in posterior hippocampus size, and those with a larger hippocampus are simply predisposed to be successful cab drivers. The study showed that there was no difference in hippocampus size at the start of training.
Question 23.4
The size of the posterior hippocampus differed in qualified trainees.
Question 23.5
You can test the effect of the variable cab driving on hippocampus size. Non-cab drivers serve as the control.
Question 23.6
“Brain cells” is not as specific as gray matter. Gray matter is made up of dendrites and cell bodies that do much of the processing in the brain.
Question 23.7
The blue bars tell us that the posterior hippocampus is of similar size in the groups prior to training.
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