Data from Tivnan (1980) measuring changes in cognitive growth over a
three-week period in a sample of 17 first and second-graders.
     
    
    
    
    A person-period data frame with 445 rows and
4 columns:
- id
- Child ID. 
- game
- Game number. Each child played up to a maximum of 27 games. 
- nmoves
- The number of moves completed before making a catastrophic error. 
- read
- Score on an unnamed standardized reading test. 
 
    
    Source
    Tivnan, T. (1980). Improvements in performance on cognitive tasks: The
acquisition of new skills by elementary school children. Unpublished doctoral
dissertation. Harvard University, Graduate School of Education.