1. Title: Balance Scale Weight & Distance Database
2. Source Information:
(a) Source: Generated to model psychological experiments reported
by Siegler, R. S. (1976). Three Aspects of Cognitive
Development. Cognitive Psychology, 8, 481-520.
(b) Donor: Tim Hume (hume@ics.uci.edu)
(c) Date: 22 April 1994
3. Past Usage: (possibly different formats of this data)
- Publications
1. Klahr, D., & Siegler, R.S. (1978). The Representation of
Children's Knowledge. In H. W. Reese & L. P. Lipsitt (Eds.),
Advances in Child Development and Behavior, pp. 61-116. New
York: Academic Press
2. Langley,P. (1987). A General Theory of Discrimination
Learning. In D. Klahr, P. Langley, & R. Neches (Eds.),
Production System Models of Learning and Development, pp.
99-161. Cambridge, MA: MIT Press
3. Newell, A. (1990). Unified Theories of Cognition.
Cambridge, MA: Harvard University Press
4. McClelland, J.L. (1988). Parallel Distibuted Processing:
Implications for Cognition and Development. Technical
Report AIP-47, Department of Psychology, Carnegie-Mellon
University
5. Shultz, T., Mareschal, D., & Schmidt, W. (1994). Modeling
Cognitive Development on Balance Scale Phenomena. Machine
Learning, Vol. 16, pp. 59-88.
4. Relevant Information:
This data set was generated to model psychological
experimental results. Each example is classified as having the
balance scale tip to the right, tip to the left, or be
balanced. The attributes are the left weight, the left
distance, the right weight, and the right distance. The
correct way to find the class is the greater of
(left-distance * left-weight) and (right-distance *
right-weight). If they are equal, it is balanced.
5. Number of Instances: 625 (49 balanced, 288 left, 288 right)
6. Number of Attributes: 4 (numeric) + class name = 5
7. Attribute Information:
1. Class Name: 3 (L, B, R)
2. Left-Weight: 5 (1, 2, 3, 4, 5)
3. Left-Distance: 5 (1, 2, 3, 4, 5)
4. Right-Weight: 5 (1, 2, 3, 4, 5)
5. Right-Distance: 5 (1, 2, 3, 4, 5)
8. Missing Attribute Values:
none
9. Class Distribution:
1. 46.08 percent are L
2. 07.84 percent are B
3. 46.08 percent are R