Cowles                package:effects                R Documentation

_C_o_w_l_e_s _a_n_d _D_a_v_i_s'_s _D_a_t_a _o_n _V_o_l_u_n_t_e_e_r_i_n_g

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

     The 'Cowles' data frame has 1421 rows and 4 columns. These data
     come from a study of the personality determinants of volunteering
     for psychological research.

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

     Cowles

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

     This data frame contains the following columns:

     _n_e_u_r_o_t_i_c_i_s_m scale from Eysenck personality inventory.

     _e_x_t_r_a_v_e_r_s_i_o_n scale from Eysenck personality inventory.

     _s_e_x a factor with levels: 'female'; 'male.'

     _v_o_l_u_n_t_e_e_r volunteeing, a factor with levels: 'no'; 'yes'.

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

     Cowles, M. and C. Davis (1987) The subject matter of psychology:
     Volunteers. _British Journal of Social Psychology_ *26*, 97-102.

_E_x_a_m_p_l_e_s:

     summary(Cowles)

