Waterdata              package:mixtools              R Documentation

_W_a_t_e_r-_L_e_v_e_l _T_a_s_k _D_a_t_a _S_e_t

_D_e_s_c_r_i_p_t_i_o_n:

     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.

_U_s_a_g_e:

     Waterdata

_F_o_r_m_a_t:

     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).

_S_o_u_r_c_e:

     Thomas, H. and Lohaus, A.  (1993) _Modeling Growth and Individual
     Differences in Spatial Tasks_, University of Chicago Press,
     Chicago.

