Side by Side Some individuals have the ability to recall accurately vast amounts of autobiographical information without mnemonic tricks or extra practice This ability is called Highly Superior Autobiographical Memory HSAM A study recruited 11 adults with confirmed HSAM and 15 control individuals of similar age without HSAM All study participants were given a battery of cognitive and behavioral tests with the goal of finding out what might explain this extraordinary ability One of the cognitive test the study participants completed was the Leyton Obsessional Inventory test which has a maximum score of 30 points The results for the 11 HSAM individuals and for 14 of the controls are displayed below one individual in the control group left before completing this test HSAM 245 88 99 10 11 11 12 Control 1 2 2 2 2 4 4 4 5 7 8 8 12 12 Click to download the data in your preferred format Excel Minitab14 18 Minitab18 JMP SPSS TI R Mac TXT PC TXT CSV CrunchIt How do individuals with and without HSAM compare in terms of obsessional score Follow the four step process in reporting your work 1 A K R LePort et al Behavioral and neuroanataomical investigation of Macmillan Learning PLAN Compare the distributions as well as the means and standard deviations between the HSAM and control groups SOLVE Make dotplots for the HSAM and control groups Calculate the mean and standard deviation in obsessional score for the HSAM and control group Provide the answers for the sample mean x and sample standard deviation s results for the control group and the HSAM group with precision to two decimal places Xcontrol Scontrol HSAM