REFERENCES
- Adamson , P.G. and Cole , A. 1969 . A simple method for drawing molecules using a digital plotter . Acta Crystallographica , A25 : 535 – 539 .
- Cattell , R.B. 1966 . “ The meaning and strategic use of factor analysis ” . In Handbook for Multivariate Experimental Psychology , Edited by: Cattell , R.B. Chicago : Rand McNally .
- Eliot , J. and Hauptman , A. 1981 . Different dimensions of spatial ability . Studies in Science Education , 8 : 45 – 66 .
- Gibson , J.J. 1966 . The Senses Considered as Perceptual Systems , Boston : Houghton Mifflin .
- Kaiser , H.F. 1959 . Computer program for Varimax rotation in factor analysis . Educational and Psychological Measurement , 19 : 413 – 420 .
- Nicholson , J.R. and Seddon , G.M. 1977 . The understanding of pictorial spatial relationships by Nigerian secondary school students . Journal of Cross‐cultual Psychology , 8 : 381 – 400 .
- Santos Veiga , J. , Seddon , G.M. and Jusoh , I. 1981 . Testing the understanding of pictorial spatial relationships using the Portuguese and Malay languages . Educational Psychology , 1 : 305 – 318 .
- Seddon , G.M. , Tariq , R.H. and Santos Veiga , J. 1982 . The visualization of spatial transformations in diagrams of molecular structures . European Journal of Science Education , 4 : 409 – 420 .