Psychologists suggest that to cure cruelty

We can infer that Sir Francis Galton's aim was

1. 
   to measure people's ability to picture past experiences
   
2. 
   to discover what his colleagues had eaten for breakfast
   
3. 
   to find out how much attention his colleagues paid to their domestic surroundings
   
4. 
   to assess the incidence of color-blindness
   

2. The writer states that

1. 
   most people cannot visually recall events as recent as that morning
   
2. 
   some people are completely unable to guess at the weight of something
   
3. 
   past experiences become less important to us as we grow up
   

D) not all people have the same ability to visualize things