Table 2.

Logistic regression analysis for measures of IQ and block construction predicting geometric response (in the black chamber) and correct performance (in the blue wall chamber) in experiment 1

	Four black walls: geometric corners (C and R)				Blue wall: correct corner
Predictor	B	SE B	eB	R2	B	SE B	eB	R2
Overall IQ	0.060	0.024	1.061*	0.158	0.053	0.022	1.054*	0.113
DAS pattern construction	0.039	0.015	1.040*	0.123	0.009	0.014	1.009	0.007

Scores for reorientation performance are taken from search at the geometric corners (correct plus rotationally equivalent corner) in the chamber with all black walls and search at the correct corner only in the chamber with one blue wall. Standardized measures include IQ from the Kaufman Brief Intelligence Test (37), and age equivalence for the Pattern Construction test from the DAS (38). Left/right comprehension and production data were collected for 16 participants. In the production task, a 3-cm x 3-cm square was displayed in the middle of a computer screen with a smiley face placed next to one of its sides (left, right, top, bottom). On each trial, participants were asked, “Where is the smiley face to the square?” They answered by labeling the position of the smiley face (e.g., left, right). In the Comprehension task, participants were given a 20-cm × 14-cm paper with a 3-cm × 3-cm square drawn at the center. They were asked to point to “the left [or right/top/bottom] side of the square.” In each task, each term was tested four times, for a total of 16 trials [task was taken from Dessalegn and Landau (39)]. In the Production task, participants correctly identified the location of the smiley face for terms left/right on 72.75% (SD, 30.35%) of the trials, whereas in the Comprehension task they correctly pointed to the left/right side on 71.62% (SD, 25.89%) of the trials. In both tasks participants scored above 90% for the terms “top” and “bottom” (M production, 99.52; SD, 0.02; M comprehension, 92.05; SD, 0.22). e^B, exponentiated B.

*Significant at P < 0.05.