1. A total of 8 children participated in a study with eight boys and eight. The subjects were randomly selected from one private school and one public school in a middle-class area of an Italian city with a population of 250, 000. Each subject was interviewed by a researcher and observations are made by a 2nd researcher. The same interview was performed 12 months later and again after another 12 months. The resulting data for the 1 st session is as follows:

Name Age in Sex School Test Score Completed years Task James 11 Male Public 65.56 Yes Amelia 8 Female Private 14.02 No Mia 10 Female Private 78.43 Yes Isabella 8 Female Public 49.15 Yes Olivia 10 Female Public 3.54 No Ava 9 Female Public 20.72 No Benjamin 9 Male Private 90.26 Yes Emma 12 Female Private 72.76 Yes William 12 Male Private 77.73 Yes Lucas 8 Male Private 97.55 No Liam 12 Male Public 26.10 Yes Elijah 8 Male Public 97.93 Yes Oliver 10 Male Public 58.67 No Noah 10 Male Private 94.45 No Charlotte 10 Female Private 61.36 No Sophia 8 Female Public 89.85 No