Mental Rotation: A Task for the Assessment of Visuospatial Skills of Children

1998 ◽  
Vol 86 (2) ◽  
pp. 527-536 ◽  
Author(s):  
Gerry A. Stefanatos ◽  
Ester S. Buchholz ◽  
Nancy Fay Miller
Keyword(s):  
Mental Rotation ◽  
Three Dimensional ◽  
Vertical Plane ◽  
Mirror Image ◽  
Three Dimensional Objects ◽  
Black And White ◽  
Task Instructions ◽  
Visuospatial Skills ◽  
Comprehensive Test ◽  
The Right

7 girls and 5 boys, ranging in age from 7 to 12 years, participated in the pilot testing of a mental rotation task developed for use in a comprehensive test battery of visuoperceptual abilities. Two asymmetric, three-dimensional objects were constructed from wood strips such that one object was the mirror-image of the other. Black and white photographs were taken of these objects in various spatial orientations along a horizontal plane. 16 photographs depicted the object right-side-up and in 16 the object was upside-down (rotated 180° in the vertical plane). These photographs were presented to the children who were asked to match each with the corresponding object. Analysis indicated correct judgements of the right-side-up images occurred more frequently than the upside-down images ( t11=4.73, p<.001). Using these data, adjustments were made to the task instructions to provide greater clarity for the young participants.

Effects of prolonged weightlessness on mental rotation of three-dimensional objects

1993 ◽  
Vol 94 (1) ◽  
Author(s):  
Y. Matsakis ◽  
M. Lipshits ◽  
V. Gurfinkel ◽  
A. Berthoz
Keyword(s):  
Mental Rotation ◽  
Three Dimensional ◽  
Three Dimensional Objects

Does Philosophy ‘Leave Everything as it is’? Even Theology?

1989 ◽  
Vol 25 ◽  
pp. 225-236
Author(s):  
Renford Bambrough
Keyword(s):  
Rocky Mountains ◽  
Three Dimensional ◽  
Two Dimensions ◽  
Three Dimensional Objects ◽  
Black And White ◽  
Aurora Borealis ◽  
The Church

Does photography leave everything as it is? Clearly not. It scalps Uncle George, as he stands at the church door, proudly, innocently, in the role of bride's father, and it decapitates his nephew James, who had until now been a head taller than any other member of the wedding group. It reduces to two dimensions, and to black and white, such solid three-dimensional objects as the Rocky Mountains and St Paul's Cathedral, such colourful scenes and sights as the Aurora Borealis and sunset in the desert.

Mental rotation of representations of two-dimensional and three-dimensional objects.

1985 ◽  
Vol 39 (1) ◽  
pp. 100-129 ◽  
Author(s):  
Pierre Jolicœur ◽  
Sonya Regehr ◽  
Lyndon B. J. P. Smith ◽  
Garth N. Smith
Keyword(s):  
Mental Rotation ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Three Dimensional Objects

Real Three-Dimensional Objects: Effects on Mental Rotation

2011 ◽  
Vol 113 (1) ◽  
pp. 38-50 ◽  
Author(s):  
Michael C. Felix ◽  
Joshua D. Parker ◽  
Charles Lee ◽  
Kara I. Gabriel
Keyword(s):  
Mental Rotation ◽  
Three Dimensional ◽  
Three Dimensional Objects

Mental Rotation of Three-Dimensional Objects

Science ◽  
1971 ◽  
Vol 171 (3972) ◽  
pp. 701-703 ◽  
Author(s):  
R. N. Shepard ◽  
J. Metzler
Keyword(s):  
Mental Rotation ◽  
Three Dimensional ◽  
Three Dimensional Objects

Origin of the homochirality of biomolecules

1995 ◽  
Vol 28 (4) ◽  
pp. 473-507 ◽  
Author(s):  
L. Keszthelyi
Keyword(s):  
Amino Acids ◽  
Three Dimensional ◽  
Polarized Light ◽  
Mirror Image ◽  
Reference Points ◽  
Dimensional Structure ◽  
Theoretical Treatment ◽  
Chiral Molecules ◽  
Amino Groups ◽  
The Right

Molecules built up from a given set of atoms may differ in their three-dimensional structure. They may have one or more asymmetric centres that serve as reference points for the steric distribution of the atoms. Carbon atoms, common to all biomolecules, are often such centres. For example, the Cα atom between the carboxyl and amino groups in amino acids is an asymmetric centre: looking ON ward (i.e. from the carbOxyl to the amiNo group, with the Cα oriented so that it is above the carboxyl and amino groups) the radical characterizing the amino acid may be to the right (D-molecules) or to the left (L-molecules). Nineteen of the 20 amino acids occurring in proteins have such a structure (the exception is glycine, where the radical is a hydrogen atom). These pairs of molecules cannot be brought into coincidence with their own mirror image, as is the situation with our hands. The phenomenon has therefore been named handedness, or chirality, from the Greek word cheir, meaning hand. The two forms of the chiral molecules are called enantiomers or antipodes. They differ in rotating the plane of the polarized light either to the right or to the left. The sense of rotation depends on the wavelength of the measuring light, but at a given wavelength it is always opposite for a pair of enantiomers. Chirality may also occur when achiral molecules form chiral substances during crystallization (for example, quartz forms D-quartz or Lquartz). A detailed theoretical treatment of molecular chirality is given by Barron (1991).

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