Waterdata {mixtools} | R Documentation |
This data set arises from the water-level task proposed by the Swiss psychologist Jean Piaget to assess children's understanding of the physical world. This involves presenting a child with a rectangular shaped, two-dimensional vessel on a sheet of paper tilted in specified clock-hour orientations. The child is then required to draw a line representing the still liquid in the tilted vessel. Then, the degree of deviation about the horizontal is recorded.
Waterdata
This data frame consists of 405 children (the rows) and the degree of deviation about the horizontal (the columns) for 8 specified clock-hour orientations (1, 2, 4, 5, 7, 8, 10, and 11 o'clock).
Thomas, H. and Lohaus, A. (1993) Modeling Growth and Individual Differences in Spatial Tasks, University of Chicago Press, Chicago.